JP2001006920A - Superconducting wiggler magnet equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize high performance and excellent economical property and enable improving reliability in the case that superconductive wiggler magnet equipment has multipoles and is long in the longitudinal direction. SOLUTION: This equipment is provided with a vacuum vessel 17, a magnet assembly 14 wherein a plurality of pairs of superconducting coils 12 which vertically face with each other interposing a beam duct 11 forming an electron beam path in the vacuum vessel are arranged in parallel in the longitudinal direction of the beam duct 11, a cooling means 15 for cooling the magnet assembly at a very low temperature, and a radiation shield 16 which is arranged so as to surround the magnet assembly 14 and the cooling means 15, is installed as an insertion light source in a radiation light ring, and generates a radiation light. In this case, scattering radiation light paths are formed on both sides of an electron beam path formed in the central part of the widthwise direction of the beam duct 11, and the height of the scattering radiation light paths is made lower than the height of the electron beam path and higher than the scattering width of a scattering radiation light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting wiggler magnet device which is incorporated in an accelerator and generates radiation.

[0002]

2. Description of the Related Art Recently, for the diagnosis of ischemic heart disease such as angina pectoris or myocardial infarction caused by stenosis of the coronary artery of the heart, a synchrotron radiation diagnostic apparatus using synchrotron radiation as a powerful X-ray source has been developed. Attention has been paid.

One example of this synchrotron radiation diagnostic apparatus is a journal of the Atomic Energy Society of Japan.
vol. 36, No. 7 (1994), and this will be described with reference to FIG.
The electrons accelerated by the electron injector 1 are incident on the synchrotron radiation ring 2 and accelerated. The synchrotron radiation ring 2 mainly includes a bending electromagnet 3 for bending the electrons along the orbit, a quadrupole electromagnet 4 for converging the electrons, and an accelerating space for accelerating the electrons to the rated energy and compensating for the energy loss due to the synchrotron radiation. It is composed of a torso 5.

Further, a superconducting wiggler magnet device 6 is installed in the linear portion of the radiating light ring 2 as an insertion light source for generating high-energy radiating light with a large intensity. Is emitted. The emitted light 10 generated by the superconducting wiggler magnet device 6 is reflected by the monochromator 7 and irradiated to the patient 8, and diagnosed by the high-speed image processing system 9.

Here, an example of the superconducting wiggler magnet device will be described with reference to FIGS. 20 is a longitudinal sectional view, FIG. 21 is a sectional view taken along line AA of FIG. 20, and FIG. 22 is a sectional view taken along line BB of FIG.

Referring to FIGS. 20 to 22, a vacuum vessel 17 is shown.
A plurality of pairs of superconducting coils 12 vertically facing each other with a beam duct 11 forming an electron beam path 11a therebetween in the vacuum vessel 17 are arranged in parallel in the longitudinal direction of the beam duct 11, and a yoke 13 serving as a magnetic path is provided. And a cooling means 15 for cooling the magnet assembly 14 to a cryogenic temperature, a magnet assembly, a cooling means for cooling the magnet assembly to a cryogenic temperature, the magnet assembly 14 and the cooling means 1
5 and a radiation shield 16 provided so as to surround the radiation shield 5.

The principle of generation of the emitted light 10 is as shown in FIG. 23, in which a plurality of pairs of superconducting coils 12 form an N pole and an S pole,
By applying a perpendicular magnetic field to the electron beam 41,
The trajectory of the electron beam 41 is bent, and at this time, the emitted light 10 is generated in the tangential direction of the trajectory of the electron beam.

Therefore, scattered radiation 10 a is generated not only at the apex of the bent electron beam trajectory but also at various locations in the hatched area, and the width of the electron beam path 11 a is adjusted so that the scattered radiation 10 a does not collide with the beam duct 11. Is determined. The electron beam path 11a is maintained at a higher vacuum than that in the vacuum vessel 17 in order to suppress the attenuation of the electron beam.

The superconducting coil 12 generally has a racetrack shape as shown in FIG. 22, and the superconducting coil 12 is arranged so as to cancel out a large electromagnetic force acting on each adjacent superconducting coil 12 so that the stress generated on the superconducting coil 12 is reduced. Is to be reduced. Further, a large electromagnetic force acts as an attractive force between the pair of superconducting coils 12 facing each other, but the spacing pieces 19 arranged on both sides of the beam duct 11.
Thus, the pair of superconducting coils 12 are connected to withstand the attractive force of the electromagnetic force.

Further, the superconducting coil 12 is provided with a cooling means 15.
To maintain the superconducting state. On the other hand, since the beam duct 11 is maintained at a normal temperature of about 300 K, the superconducting coil 12 and the beam duct 11
A duct radiant shield 18 for reducing radiant infiltration heat is mounted therebetween.

[0011]

In recent years, there has been a demand for a superconducting wiggler magnet device having higher radiated light intensity. To meet this requirement, however, a superconducting coil 12 which is juxtaposed in the longitudinal direction of the beam duct 11 is required. A so-called multi-pole high-field superconducting wiggler magnet device with a large number and a high magnetic field has been desired.

However, the conventional structure has various problems in terms of supporting the scattered radiation 10a and the electromagnetic force. That is, the first problem is that the scattered radiation 10a and the beam duct 11
In the multipolar superconducting wiggler magnet device, the length in the longitudinal direction becomes longer, and the spread Wr of the scattered radiation 10a becomes larger.

Therefore, it is necessary to increase the width of the electron beam path 11a of the beam duct 11 so that the scattered radiation 10a does not hit the side surface of the beam duct 11. In the degree of vacuum of the electron beam path 11a and the degree of vacuum in the vacuum chamber 16, the electron beam path 11a has a degree of vacuum that is several orders of magnitude higher, but stress is applied to the beam duct due to the differential pressure in a vacuum state. Never.

In general, during a factory test or the like, the beam duct 11 may be carried out with the inside of the beam duct kept at the atmospheric pressure. Therefore, in consideration of the pressure imbalance at that time, the beam duct 11 can withstand a pressure difference of 1 atm between the inside and outside. It is designed to be The bending stress applied to the wall of the beam duct 11 increases in proportion to the square of the width of the electron beam path 11a, and the amount of deformation increases in proportion to the fourth power. Therefore, it is necessary to increase the wall thickness in order to suppress the stress and the amount of deformation of the beam duct 11 to within an allowable value.

However, when the wall thickness of the beam duct 11 is increased, the distance between the pair of superconducting coils 12 opposed to each other with the beam duct 11 interposed therebetween is increased, and the center magnetic field of the electron beam path 11a is reduced, thereby deteriorating the performance. There is.

Further, in the conventional method of connecting the attraction force acting on the upper and lower superconducting coils 12 by the spacing pieces 19 provided on both sides of the beam duct 11, the width is smaller than the width Wd of the beam duct 11 as shown in FIG. Width Wc of superconducting coil 12
Need to be larger.

Originally, the width Wc of the superconducting coil 12 should be determined in view of the required magnetic field. Increasing the width Wc of the superconducting coil 12 for supporting increases the electromagnetic force generated in the superconducting coil 12. In addition to increasing the stress of each part, the coil loss increases, which is disadvantageous from the viewpoint of cooling. In addition, an economically expensive superconducting wire is additionally used, which is extremely unreasonable.

The second problem is that the number of poles is long and the length in the longitudinal direction is long, and as the size of the apparatus increases, the amount of radiant heat that enters the superconducting coil 12 from the beam duct 11 increases, and the cooling means 15 for the superconducting coil 12 increases. There is a problem that the capacity of the memory increases.

A third problem is to adjust the magnetic field distribution in the longitudinal direction. That is, it is necessary to make the integral value of the magnetic field in the longitudinal direction zero, and to match the electron beam trajectories at the entrance and exit of the superconducting wiggler magnet device, so that the integral value of the multipole magnetic field in the longitudinal direction becomes zero. It needs to be adjusted so that For example, in the case of three poles, it can be easily adjusted by applying a bias voltage to the superconducting coils at both ends and adjusting the magnetic field at the ends.

On the other hand, in a multipolar superconducting wiggler magnet device having, for example, nine poles, since the central seven poles are excited by the same power supply, there is a problem that errors in the magnetic field due to manufacturing errors of the individual superconducting coils 12 and the like occur. .

A fourth problem is how to prevent quench (normal conduction transition) of the superconducting coil 12. In the conventional excitation circuit shown in FIG. 24, when the power is turned off, a current decay is exhibited according to a time constant determined by the inductance L of the superconducting coil 12 and the parallel resistance R1. The maximum voltage at that time is the current I
And the parallel resistance R1.

Generally, superconducting coil 12 has an allowable time constant, and parallel resistance R1 is selected so as to have a shorter time than the allowable time constant. In the multi-pole superconducting wiggler magnet device, the parallel resistance R1 must be naturally increased because the total inductance increases.

However, when the parallel resistance R1 is increased, there is a disadvantage that the voltage at both ends becomes excessive. Further, in order to reduce the voltage between both ends, as shown in FIG.
In the excitation circuit equipped with the parallel resistance R2, the current decay differs between the quenched superconducting coil 12 and the normal superconducting coil 12, and an unbalanced electromagnetic force is generated, resulting in a large stress on the normal superconducting coil 12. is there. In particular, when a space or a gap exists inside and outside the superconducting coil 12, a larger stress is generated in the superconducting coil 12.

The present invention has been made in order to solve the above-mentioned conventional problems. Even if it is multi-pole and long in the longitudinal direction of the beam duct, it has high performance, is economically excellent, and has improved reliability. It is an object to provide a superconducting wiggler magnet device that can be achieved.

[0025]

In order to achieve the above object, a superconducting wiggler magnet device is constituted by the following means.

The invention corresponding to claim 1 includes a vacuum vessel,
A magnet assembly in which a plurality of pairs of superconducting coils vertically facing each other across a beam duct forming an electron beam path in the vacuum vessel are arranged in parallel in the longitudinal direction of the beam duct, and the magnet assembly is cooled to a very low temperature. In a superconducting wiggler magnet device that includes a cooling means and a radiation shield provided so as to surround the magnet assembly and the cooling means, and is installed as an insertion light source in a radiation light ring to generate radiation light, A scattered radiation light path is formed on both sides of an electron beam path formed at the center in the lateral direction, and the height of the scattered radiation light path is lower than the height of the electron beam path and higher than the scattering width of the scattered radiation light. is there.

In the superconducting wiggler magnet device according to the present invention corresponding to claim 1, scattered radiation does not hit the beam duct and the strength of the beam duct is increased without increasing the wall thickness of the beam duct. Thus, the interval between the upper and lower superconducting coils can be made as small as possible.

According to a second aspect of the present invention, there is provided a superconducting wiggler magnet device according to the first aspect,
The scattered radiation optical path is formed with an inclined surface such that at least the distal end portion is narrowed.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 2, in addition to the function of the invention corresponding to claim 1, even when scattered radiation light hits, the unit is formed by the inclined surface of the narrowing. The heat flux per area can be significantly reduced.

According to a third aspect of the present invention, there is provided a superconducting wiggler magnet device according to the first aspect,
A cooling tube is attached to the scattered radiation path side of the beam duct.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 3, in addition to the effect of the invention corresponding to claim 1, even when scattered radiation is applied, a refrigerant is caused to flow through the cooling pipe. Since the beam duct is cooled, an increase in the temperature of the beam duct can be suppressed, and the heat penetrating into the superconducting coil can be reduced.

According to a fourth aspect of the present invention, there is provided a vacuum vessel,
A magnet assembly in which a plurality of pairs of superconducting coils vertically facing each other across a beam duct forming an electron beam path in the vacuum vessel are arranged in parallel in the longitudinal direction of the beam duct, and the magnet assembly is cooled to a very low temperature. In a superconducting wiggler magnet device that includes a cooling means and a radiation shield provided so as to surround the magnet assembly and the cooling means, and is provided as an insertion light source in a radiation light ring to generate radiation light, a superconducting coil is provided. It is housed in a coil housing case.

In the superconducting wiggler magnet device according to the present invention corresponding to claim 4, the electromagnetic attractive force acting on the upper and lower superconducting coils opposed to each other can be supported by the coil storage case.

According to a fifth aspect of the present invention, in the superconducting wiggler magnet device according to the fourth aspect,
The innermost part of the coil storage case is formed of an iron core container, and a magnetic material iron core is mounted on the iron core container.

In the superconducting wiggler magnet device of the present invention corresponding to claim 5, the magnetic resistance of the magnetic circuit is reduced by mounting the magnetic iron core, and a larger magnetic field is generated. Further, the magnetic core is brittle at low temperatures and its mechanical strength is remarkably reduced. However, since the iron container in which the magnetic core is stored bears electromagnetic force and the like, no load is applied to the magnetic core.

According to a sixth aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect,
An iron core container is fixed to an upper lid fixed to a coil storage case.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 6, in addition to the effect of the invention corresponding to claim 5, the attractive force acting on the opposing magnetic material cores is transmitted via the iron core container. To the upper lid and can be supported by the coil storage case.

According to a seventh aspect of the present invention, in the superconducting wiggler magnet device according to the fourth aspect,
The space between the superconducting coil and the coil housing case is filled with a curable resin.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 7, in addition to the function of the invention corresponding to claim 4, the electromagnetic force acting on the superconducting coil is reliably transmitted to the coil storage case. Since there is no gap, the amount of deformation of the superconducting coil can be suppressed as much as possible, and the stress can be reduced.

The invention corresponding to claim 8 is the superconducting wiggler magnet device according to the invention corresponding to claim 5,
At least one of the opposing surfaces of the superconducting coil and the coil housing case is coated with a fluororesin.

According to a superconducting wiggler magnet device of the present invention corresponding to claim 8, in addition to the function of the invention corresponding to claim 5, the superconducting coil and the coil housing case can be used when an electromagnetic force is applied or when cooling is performed. Generates low heat because they slide in contact with each other via a fluorine resin which is a low friction material. Also, when filling the curable resin, it acts as a mold release agent and can prevent adhesion between the superconducting coil and the coil storage case. Quenching can be suppressed.

According to a ninth aspect of the present invention, in a superconducting wiggler magnet device according to the fourth aspect,
The wedge is mounted in the gap between the superconducting coil and the coil storage case.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 9, in addition to the function of the invention corresponding to claim 4, the electromagnetic force acting on the superconducting coil is surely transmitted via the wedge. Since it is transmitted to the storage case and there is no gap, the amount of deformation of the superconducting coil can be suppressed as much as possible, and the stress can be reduced.

According to a tenth aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect of the present invention, permenda is used as the material of the magnetic iron core.

According to a tenth aspect of the present invention, there is provided a superconducting wiggler magnet device according to the fifth aspect of the present invention, in addition to the effects of the fifth aspect, a permender having a high saturation magnetic flux density and a high electric resistance as a magnetic iron core. , A high magnetic field can be generated and the eddy current is rapidly attenuated.

According to an eleventh aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect of the present invention, a hardening resin is filled in a gap between the iron core container and the magnetic core.

According to a superconducting wiggler magnet device of the present invention corresponding to claim 11, in addition to the effect of the invention corresponding to claim 5, when any of the adjacent superconducting coils is quenched, the coil that has been quenched Is crushed from the outside by the electromagnetic force of the sound coil. The electromagnetic force acting at that time is reliably transmitted to the magnetic material iron core via the iron core container, and since there is no gap, the amount of deformation of the superconducting coil can be suppressed as much as possible, and the stress can be reduced.

According to a twelfth aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect, a wedge is attached to a gap between the iron core container and the magnetic iron core to fix the magnetic iron core to the iron core container. It was done.

According to a twelfth aspect of the present invention, there is provided a superconducting wiggler magnet device according to the fifth aspect of the present invention. Is crushed from the outside by the electromagnetic force of the sound coil. The electromagnetic force acting at that time is reliably transmitted to the magnetic material iron core via the iron core container and the wedge, and since there is no gap, the amount of deformation of the superconducting coil can be suppressed as much as possible, and the stress can be reduced.

According to a thirteenth aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect of the present invention, at least one of the surfaces opposing the beam duct of the magnetic iron core satisfies the required magnetic field distribution. It is formed in such a shape that it can be obtained.

According to the superconducting wiggler magnet device of the present invention corresponding to the thirteenth aspect, in addition to the effect of the invention corresponding to the fifth aspect, the magnetic field distribution of the electron beam path can be easily adjusted. Can match accuracy.

According to a fourteenth aspect of the present invention, in the superconducting wiggler magnet device according to the fifth aspect of the present invention, there is provided a superconducting wiggler magnet device having an interval adjusting means for adjusting an interval of the magnetic material iron core facing the beam duct. is there.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 14, in addition to the effect of the invention corresponding to claim 5, since the magnetic field distribution of the beam path can be easily adjusted, the required magnetic field accuracy can be improved. Can be matched.

The invention corresponding to claim 15 is based on claim 14.
In the superconducting wiggler magnet device according to the invention, the distance adjusting means has a liner mounted between the iron core container and the magnetic core.

According to a fifteenth aspect of the present invention, in addition to the function of the fourteenth aspect of the present invention, a liner made of a non-magnetic material is mounted between an iron core container and a magnetic material iron core. By adjusting the distance between the magnetic material iron cores, the required magnetic field accuracy can be matched.

The invention corresponding to claim 16 is claim 14.
In the superconducting wiggler magnet device according to the present invention, the distance adjusting means is formed by attaching an iron core container and a magnetic iron core with adjusting screws.

According to a superconducting wiggler magnet device of the present invention corresponding to claim 16, in addition to the effect of the invention corresponding to claim 14, the distance between the magnetic material iron cores is varied by changing the length of the adjusting screw. Can be adjusted to the required magnetic field accuracy.

According to a seventeenth aspect of the present invention, there is provided a vacuum vessel, and a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In the superconducting wiggler magnet device for generating radiated light, light receiving plates are provided on both sides in the width direction of the electron beam path of the beam duct.

According to the present invention corresponding to claim 17,
Since the scattered radiation hits the light receiving plate and is removed and does not hit the beam duct, the temperature rise of the beam duct is suppressed,
Heat penetrating into the superconducting coil is reduced.

According to an eighteenth aspect of the present invention, there are provided a vacuum vessel and a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel in a longitudinal direction of the beam duct. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In a superconducting wiggler magnet device that generates radiated light, a duct radiation shield is provided between the beam duct and the superconducting coil, and an adiabatic spacer is placed between the superconducting coil and the duct radiation shield and between the beam duct and the duct radiation shield. It is interposed.

In the superconducting wiggler magnet device according to the present invention, the deformation of the duct radiation shield caused by the eddy current induced in the duct radiation shield and the electromagnetic force acting between the superconducting coils is controlled by the heat insulating spacer. Since it is held down, it is possible to prevent heat from penetrating due to contact.

According to a nineteenth aspect of the present invention, there is provided a vacuum vessel and a plurality of pairs of superconducting coils vertically opposed to each other with a beam duct forming an electron beam path in the vacuum vessel in a longitudinal direction of the beam duct. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In a superconducting wiggler magnet device that generates radiation light, a duct radiation shield is arranged between the beam duct and the superconducting coil, and at least a part of the duct radiation shield in the thickness direction is made of ceramic. is there.

In the superconducting wiggler magnet device according to the present invention corresponding to claim 19, since the duct radiation shield is made of ceramics and an electrically insulating material, eddy currents are generated even when the superconducting coil is extinguished or when the superconducting coil is quenched. Is not induced, and no electromagnetic force acts.

According to a twentieth aspect of the present invention, a vacuum vessel and a pair of superconducting coils vertically opposed to each other with a beam duct forming an electron beam path therebetween in the vacuum vessel are arranged in pairs in the longitudinal direction of the beam duct. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In a superconducting wiggler magnet device that generates radiation light, a duct radiation shield is disposed between the beam duct and the superconducting coil, and the material of the duct radiation shield is made of an electrically insulating material or a metal material having high electric resistance. Either one, and a heat transfer layer made of a good heat conductive material is applied on at least one surface in the thickness direction A.

In the superconducting wiggler magnet device according to the present invention, the duct radiating shield is made of a high electric resistance material, so that when the superconducting coil is extinguished or when the superconducting coil is quenched. Eddy currents induced in the radiation shield can be reduced. In addition, since the surface is made of a good heat conductive material, the heat resistance is small, and the duct radiation shield is uniformly cooled.

The invention corresponding to claim 21 is claim 20
In the superconducting wiggler magnet device according to the invention, the heat transfer layer is formed in a comb shape in which one end of a plurality of teeth is short-circuited in the longitudinal direction.

According to the superconducting wiggler magnet device of the present invention corresponding to claim 21, in addition to the operation of the superconducting wiggler magnet device of the invention corresponding to claim 20,
Since the heat transfer layer is formed in a comb shape, the eddy current generated in the heat transfer layer can be further reduced, and the thickness of the heat transfer layer can be further increased, so that the thermal resistance is further reduced.

According to a twenty-second aspect of the present invention, there is provided a vacuum vessel and a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In the superconducting wiggler magnet device for generating radiation light, a beam duct and at least one of a radiation shield and a cooling means are thermally connected by a thermal anchor having a predetermined thermal resistance.

In the superconducting wiggler magnet device according to the present invention, the beam duct is cooled by a radiation anchor or a cooling means with a thermal anchor having a predetermined thermal resistance.

According to a twenty-third aspect of the present invention, a vacuum vessel and a plurality of superconducting coils vertically opposed to each other with a beam duct forming an electron beam path therebetween in the vacuum vessel are arranged in pairs in the longitudinal direction of the beam duct. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In the superconducting wiggler magnet device for generating radiated light, the beam duct and the vacuum vessel are communicated by a communication pipe via a vacuum valve.

In the superconducting wiggler magnet device according to the present invention, when the beam duct and the vacuum vessel are evacuated, the vacuum valve is opened to allow the beam duct to communicate with the inner and outer pressures of the beam duct. Does not work.

According to a twenty-fourth aspect of the present invention, there is provided a vacuum vessel and a plurality of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In the superconducting wiggler magnet device for generating radiated light, the beam duct and the vacuum vessel are communicated by a communication pipe having a predetermined conductance.

In the superconducting wiggler magnet device according to the present invention corresponding to claim 24, the beam duct and the vacuum vessel are operated at a predetermined vacuum degree difference, so that the pressure difference between the inside and outside acting on the beam duct can be reduced. .

According to a twenty-fifth aspect of the present invention, there is provided a vacuum vessel and a plurality of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel. A magnet assembly provided, cooling means for cooling the magnet assembly to a cryogenic temperature, and a radiation shield provided so as to surround the magnet assembly and the cooling means, and installed as an insertion light source in the radiation light ring. In the superconducting wiggler magnet device for generating radiated light, each of the superconducting coils is constituted by a plurality of coils consisting of a main coil and a sub coil, and the main coil and the sub coil are connected to separate excitation power supplies.

In the superconducting wiggler magnet device according to the present invention, since the main coil and the sub coil can be excited independently, a predetermined empirical magnetic field is applied to the main coil by the sub coil in advance. In addition, the AC loss when the main coil is excited is reduced.

The invention corresponding to claim 26 is based on claim 25.
In the superconducting wiggler magnet device according to the present invention, the sub-coil is disposed on the side of the main coil opposite to the beam duct.

According to a superconducting wiggler magnet device of the invention corresponding to claim 26, in addition to the operation of the superconducting wiggler magnet device of claim 25, the magnetic field of the electron beam path is reduced by a predetermined low magnetic field. And applying a larger magnetic field to the main coil to further reduce the AC loss when the main coil is excited.

The invention corresponding to claim 27 is based on claim 25.
In the superconducting wiggler magnet device according to the present invention, the sub coil is disposed concentrically around the outer periphery of the main coil.

According to a superconducting wiggler magnet device of the present invention corresponding to claim 27, in addition to the operation of the superconducting wiggler magnet device of the invention corresponding to claim 25,
By exciting only the sub-coil, a gradual magnetic field distribution in the longitudinal direction can be realized, and an empirical magnetic field can be applied to the main coil to reduce the AC loss when the main coil is excited.

[0080]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a superconducting wiggler magnet device according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line CC of FIG. The same parts will be described with the same reference numerals.

In FIGS. 1 and 2, reference numeral 17 denotes a box-shaped vacuum vessel, and a beam duct 11 is disposed in the vacuum vessel 17 through through holes respectively provided substantially at the center of both sides of the vacuum vessel 17. At the same time, a flexible support is provided between each through hole and the beam duct 11 outside the container to keep the inside of the container in a vacuum state.

A pair of superconducting coils 12 which are vertically opposed to each other with the beam duct 11
Are provided in parallel in the longitudinal direction of the beam duct 11. These superconducting coils 12 are provided in a coil storage case 20.
And is integrated with an upper lid 21 fixed to the coil storage case 20 to constitute a magnet assembly 14. A radiation shield 16 is provided around the magnet assembly 14.

Further, the superconducting coil 12 is cooled and maintained at a very low temperature of, for example, about 5 K by the cooling means 15 such as a refrigerator installed on the upper surface of the vacuum vessel 17 in the magnet assembly 14 to maintain the superconducting state.

On the other hand, since the beam duct 11 is maintained at a normal temperature of about 300 K, a duct radiation shield 18 is provided between the superconducting coil 12 and the beam duct 11 to reduce heat intrusion.

An iron core container 22 is formed on the innermost side of the coil housing case 20, and a magnetic material iron core 23 is provided in the iron core container 22. The iron core container 22 is fixed to the upper lid 21 fixed to the coil storage case 20.

Further, as shown in FIG.
1. A scattered radiation optical path 11b is formed in a direction orthogonal to the traveling direction of the electron beam 1, that is, on both sides in the width direction of the electron beam path 11a formed in the central portion in the lateral direction.
The height Hr of 1b is lower than the height Hb of the electron beam path 11a and higher than the scattering width Hs of the scattered radiation 10a.

With the superconducting wiggler magnet device having such a configuration, the following operational effects can be obtained.

In the multipolar superconducting wiggler magnet device,
The length in the longitudinal direction becomes longer, and Wr of the scattered radiation 10a increases substantially in proportion to the length in the longitudinal direction, as shown in FIG. 23 described above.
Since scattered radiation optical paths 11b are formed on both sides of a,
The scattered radiation 10a does not hit the side surface of the beam duct 11. Inside the beam duct 11 and the vacuum vessel 1
Although the degree of vacuum in 7 is several orders of magnitude higher in the beam duct 11, no stress is applied to the beam duct since all are differential pressures in a vacuum state.

However, as described above, in general, during a factory test or the like, the beam duct may be carried out with the inside of the beam duct kept at the atmospheric pressure. It is designed to withstand a pressure difference of 1 atm between inside and outside. When the wall thickness of the beam duct 11 is equal, the bending stress applied to the wall of the beam duct 11 is proportional to the square of (the width of the electron beam path 11a + the width of the scattered radiation optical path 11b), and the amount of deformation is proportional to the fourth power. Then it gets bigger.

On the other hand, in the present embodiment, the height Hr of the scattered radiation optical path 11b is changed to the height Hb of the electron beam path 11a.
And the height is higher than the scattering width Hs of the scattered radiation 10a, so that the stress and deformation of the beam duct 11 can be suppressed to acceptable values without increasing the wall thickness of the electron beam path 11a.

Therefore, since the height of the beam duct 11 can be reduced, it is not necessary to increase the distance between the pair of superconducting coils 12 opposed to each other with the beam duct 11 interposed therebetween. As a result, the center magnetic field of the electron beam path 11a is increased. it can.

The magnetic iron core 23 is brittle at low temperatures and its mechanical strength is remarkably reduced. However, the attractive force acting on the magnetic iron cores 23 facing each other is transmitted to the upper lid 21 via the iron core container 22 and Supported. Therefore,
The width Wc of the superconducting coil 12 can be determined by a required magnetic field without any structural restrictions. In addition, since the electromagnetic force and the like are borne by the iron core container 22, no load is applied to the magnetic material iron core 23.

As described above, according to the present embodiment, the scattered radiation 10a can be prevented from hitting the beam duct 11, the strength of the beam duct 11 can be increased without increasing the wall thickness of the beam duct 11, and the vertical Superconducting coil 1
Since the interval of 2 can be made as small as possible, downsizing, performance and reliability of the device are improved.

Further, since the magnetic material iron core 23 is mounted in the iron core container 22 and supported by the upper lid 21, not only the structural integrity but also the superconducting coil 12 can be miniaturized, and the reliability and economy are improved. . The magnetic material core 23 is generally made of pure iron, mild steel, or the like. However, if a permender having a large saturation magnetic flux density and a high electric resistance is used, a high magnetic field can be generated, and the eddy current is rapidly attenuated. Can be improved.

Here, by forming an inclined surface such that at least the tip end of the scattered radiation optical path 11b is constricted, even when the scattered radiation 10a impinges on the beam duct 11, the inclination of the constriction causes a per unit area. Is significantly reduced.

Therefore, the temperature rise of the beam duct 11 can be suppressed, and the heat penetrating into the superconducting coil 12 can be reduced.

Further, a cooling pipe 24 may be attached to the side of the scattered radiation optical path 11b of the beam duct 11, and the beam duct 11 may be cooled by flowing a cooling medium through the cooling pipe 24.

FIG. 4 is a sectional view of a magnet assembly according to a second embodiment of the superconducting wiggler magnet device according to the present invention. The same components as those of the magnet assembly 14 shown in FIG.

In the second embodiment, as shown in FIG. 4, the superconducting coil 12 is housed in the coil housing case 20, and the space between the superconducting coil 12 and the coil housing case 20 is filled with the curable resin 34. Further, a fluorine-based resin 35 is applied to at least one of the opposing surfaces of the superconducting coil 12 and the coil housing case 20 by coating or pasting.

The magnet assembly 1 having such a configuration
4, the electromagnetic force acting on the superconducting coil 12 is reliably transmitted to the coil housing case 20 and there is no gap.
The amount of deformation of superconducting coil 12 can be suppressed as much as possible, and the stress generated in superconducting coil 12 can be reduced. When the superconducting coil 12 is energized, the opposing surface of the superconducting coil 12 and the coil housing case 20 undergoes relative deformation due to electromagnetic force and slides in contact. However, since the fluororesin 35 is a low friction material, heat is generated. Become smaller.

When filling the curable resin 34,
The fluorine-based resin 35 functions as a release agent, and the superconducting coil 1
2 and the coil storage case 20 can be prevented from being bonded,
The occurrence of quench in the superconducting coil 12 due to the breaking energy of cracking or peeling of the bonding surface during electromagnetic force loading or cooling can be suppressed.

As described above, according to the present embodiment, stable operation can be performed by avoiding quench, and structural soundness can be improved.

In the second embodiment, as shown in FIG. 5, the superconducting coil 1 is replaced with the curable resin 34 shown in FIG.
Even if the wedge 36 is attached to the gap between the coil housing 2 and the coil housing case 20, the same operation and effect as described above can be expected. The wedge 36
Needless to say, it is better to apply the fluorine-based resin 35 on the surface facing the superconducting coil 12 and the coil housing case 20 as described above.

A third embodiment of the superconducting wiggler magnet device according to the present invention will be described with reference to FIGS.

In the fourth embodiment, as shown in FIG. 4, the hardening resin 3 is provided in the gap between the iron core container 22 and the magnetic core 23.
4 is filled. The other configuration is the same as that of the first embodiment, and the description is omitted.

In the superconducting wiggler magnet device having such a configuration, any one of the adjacent superconducting coils 12
Is quenched, the quenched superconducting coil 12 is crushed from the outside by the electromagnetic force of a sound superconducting coil 12. Since the electromagnetic force acting at that time is reliably transmitted to the magnetic material iron core 23 via the iron core container 2 and there is no gap,
The amount of deformation of each superconducting coil 12 can be suppressed as much as possible, and their stress can be reduced.

Further, as shown in FIG. 5, a wedge 36 is provided in the gap between the iron core container 22 and the magnetic iron core 23 in place of the hardening resin.
The same function and effect as described above can be expected even in the case of mounting.

FIG. 6 is a magnetic field distribution diagram for explaining a fourth embodiment of the superconducting wiggler magnet device according to the present invention.

In the fourth embodiment, as shown in FIG. 6, at least one of the surfaces of the magnetic iron core 23 facing the first embodiment shown in FIG. It is formed into a shape that can satisfy the required magnetic field distribution.

That is, the shape of the superconducting coil 12 is a race track shape, and the beam duct 1 of the magnetic iron core 23 is formed.
When the surface facing 1 is flat as shown by the solid line (a), the magnetic field distribution in the horizontal axis direction L is low at the center as shown by the solid line (c) in FIG. . On the other hand, the uniformity of the magnetic field in the width direction L in the electron beam path 11a is required to have an accuracy of, for example, 0.1% or less.

Accordingly, the beam duct 1 of the magnetic material iron core 23 is
By forming at least one of the surfaces facing each other with a shape 1 as shown by a broken line (b) in FIG. 6 so as to satisfy the required magnetic field, electrons as shown by a broken line (d) in FIG. The magnetic field distribution of the beam path 11a is obtained, and the required magnetic field accuracy (accuracy of 0.1% or less) can be easily matched.

In this embodiment, the surface of the magnetic iron core 23 facing the beam duct 11 is formed into a shape capable of satisfying the required magnetic field. However, the surface is not necessarily required to be integral, and a spacer having the same shape as described above may be used. The magnetic material iron core 23 may be mounted on the opposing surface.

FIG. 7 is a longitudinal sectional view showing a fifth embodiment of a superconducting wiggler magnet device according to the present invention. The same parts as those in FIG. 2 are denoted by the same reference numerals, and their description is omitted. The part will be described.

The fifth embodiment is different from the first embodiment in that the fifth embodiment is provided with a distance adjusting means for adjusting the distance between the magnetic core 23 and the beam duct 11 therebetween, as shown in FIG. It is. In this case, a liner 37 is mounted between the iron core container 22 and the magnetic iron core 23 as an interval adjusting means.

Generally, the magnetic field generated by the plurality of superconducting coils 12 varies due to manufacturing errors, assembly errors, and the like. However, in the present embodiment, each superconducting coil 12
Can be adjusted by the liner 37, so that the integral value of the magnetic field in the longitudinal direction can be adjusted to zero, and the beam trajectories at the entrance and exit of the superconducting wiggler magnet device can be easily matched.

Therefore, it is not necessary to correct the beam trajectory, and the handleability and performance can be remarkably improved.

In the fifth embodiment, if the iron core container 22 and the magnetic material iron core 23 are attached by adjusting screws 38 as shown in FIG. Handleability can be improved.

FIG. 9 is a sectional view of a beam duct in a sixth embodiment of a superconducting wiggler magnet device according to the present invention.

In the sixth embodiment, as shown in FIG. 9, a light receiving plate 25 composed of, for example, a double wall is provided on both sides of an electron beam path 11a in a beam duct 11 so as to be inclined with respect to the scattered radiation 10a. In addition to the arrangement, cooling pipes 24 provided to penetrate both side surfaces of the beam duct 11 are connected to the light receiving plates 25, and a cooling medium is supplied from the cooling tubes 24 to cool the light receiving plates 25. It is. In this case, a bellows 26 which forms a vacuum boundary is attached to a penetrating portion of the beam duct 11 through which the cooling tube 24 penetrates.

Incidentally, the construction other than the beam duct 11 is the first construction.
Since the embodiment is the same as that of the first embodiment, the description thereof is omitted.

As described above, the light receiving plate 2 is provided in the beam duct 11.
5, the scattered radiation 10a is
Since the heat is removed at 5 and does not hit the beam duct 11, the temperature rise of the beam duct 11 can be suppressed, and the heat penetrating into the superconducting coil 12 can be reduced. Further, since the width of the scattered radiation optical path 11b can be reduced, the width of the beam duct 11 can be reduced, and the wall thickness of the beam duct 11 can be reduced, so that the performance can be improved and the apparatus can be downsized.

FIG. 10 is a perspective view showing a cross section of a main part of a duct radiation shield in a seventh embodiment of a superconducting wiggler magnet device according to the present invention.

In the seventh embodiment, as shown in FIG. 10, an insulating spacer 27 is provided between the superconducting coil (not shown) and the radiation shield 18 and between the beam duct 11 and the radiation shield 18. Are arranged almost equally. The configuration other than the main part of the duct radiation shield 18 is the same as that of the first embodiment, and a description thereof will be omitted.

In a superconducting wiggler magnet device,
When the superconducting coil 12 is excited or quenched, an eddy current is induced in the duct radiation shield 18, and an electromagnetic force acts between the superconducting coil 12 and the duct radiation shield 18 due to the eddy current. Generally, the duct radiation shield 18 is made of copper or aluminum having good heat conduction and has a small electric resistance. Therefore, a large eddy current is induced when the superconducting coil 12 is excited or quenched.

However, in the present embodiment, even if an electromagnetic force acts on the duct radiation shield 18, the heat insulating spacer 27 suppresses the deformation of the duct radiation shield 18, maintains the heat insulating space, and the duct radiation shield 18 Since contact with the beam duct 11 or the beam duct 11 can be suppressed, an increase in heat intrusion from the beam duct 11 can be prevented. In this case, as the material of the heat insulating spacer 27, a fiber reinforced resin having a low thermal conductivity or ceramics such as zirconia and alumina are desirable.

FIG. 11 is a perspective view of a duct radiation shield in an eighth embodiment of the superconducting wiggler magnet device according to the present invention.

In the eighth embodiment, as shown in FIG. 11, a base material 18a made of a metal material having a high electric resistance such as stainless steel or a titanium alloy and a ceramic 28 having a large thermal conductivity such as aluminum nitride or silica are used. The duct radiation shield 18 is constituted by at least two layers. The configuration other than the main part of the duct radiation shield 18 is the same as that of the first embodiment, and a description thereof will be omitted.

Here, since the ceramics 28 is an electric insulating material, the ceramics 28 can be used when the superconducting coil 12 is excited or
No eddy current is induced at the time of quench 2, and no electromagnetic force acts. Further, when aluminum nitride or silica is used as the ceramics 28, the thermal conductivity is more than 10 times larger than that of stainless steel, and the ceramics 28 are uniformly cooled. However, ceramics 2
8 is generally brittle, and there is a danger of breakage, especially for those that need to be thin, such as the duct radiation shield 18.

In this embodiment, since the ceramics 28 are fixed to the base material 18a made of a metal material, the soundness of the structure can be improved. Therefore, since the electromagnetic force acting on the duct radiation shield 18 can be suppressed and the cooling can be performed uniformly, the heat entering the superconducting coil 12 from the beam duct 11 can be stably suppressed.

Note that the duct radiation shield 18 may be made of only ceramics 28 having a high thermal conductivity, such as aluminum nitride or silica.

FIG. 12 is a perspective view of a duct radiation shield in a ninth embodiment of a superconducting wiggler magnet device according to the present invention.

In the ninth embodiment, as shown in FIG. 12, the base material 18a of the duct radiation shield 18 is made of an electrically insulating material such as a fiber reinforced resin or ceramics or a high electrical resistance material such as stainless steel or a titanium alloy. A thin heat transfer layer 29 of about 0.1 mm made of a good heat conductive material such as aluminum or copper on at least one side in the thickness direction of any metal material.
Is to be adhered.

With a radiation shield having such a configuration,
The base material 18a is basically made of a high electric resistance material, and the thickness of the heat transfer layer 29 is thin, so that the electromagnetic force that acts when the superconducting coil is extinguished or when the superconducting coil is quenched is made of aluminum or copper. Significant reduction compared to the conventional structure.

FIG. 13 is a perspective view showing a modification of the radiation shield in the ninth embodiment of the superconducting wiggler magnet device according to the present invention.

In this modification, as shown in FIG. 13, the heat transfer layer 29 is formed in a comb shape in which one end of a plurality of teeth 29a is short-circuited in the longitudinal direction.

Even with such a configuration, the eddy current generated in the heat transfer layer 29 can be reduced. Note that the short-circuit portion is not limited to the end portion, but may be only at one central portion.

FIG. 14 is a sectional view of a principal part showing a tenth embodiment of a superconducting wiggler magnet device according to the present invention. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted. Here, different points will be described.

In the tenth embodiment, as shown in FIG. 14, a beam duct 11 of about room temperature and a radiation shield 16 of about 80 K are thermally connected by a thermal anchor 30 having a predetermined thermal resistance. It is.

Here, the predetermined thermal resistance will be described.
The heat path that penetrates from the beam duct 11 to the radiation shield 16 is based on ordinary radiation heat, and the normal temperature part of the beam duct 11 (outside the vacuum vessel) → the low temperature part of the beam duct 11 (the mounting part of the thermal anchor 30 inside the vacuum vessel). →
There are two paths for thermal conduction from the thermal anchor 30 to the radiation shield 16. In this case, the invasion heat due to heat conduction from the normal temperature part of the beam duct 11 (outside the vacuum vessel) to the low temperature part of the beam duct 11 (the part where the thermal anchor 30 is attached inside the vacuum vessel) is proportional to the difference between these temperatures.

On the other hand, the radiant heat is proportional to the fourth power difference of the absolute temperature between the low temperature part of the beam duct 11 and the radiation shield 16.
Therefore, the thermal resistance of the thermal anchor 30 is +
Is adopted to obtain the temperature of the low-temperature portion of the beam duct 11 such that the infiltration heat represented by the following expression is minimized.

According to the present embodiment, the beam duct 11
Since the heat entering the radiation shield 16 can be suppressed to a minimum, the cooling capacity of the cooling means 15 can be reduced, and stable operation can be achieved.

FIG. 15 is a sectional view showing an eleventh embodiment of the superconducting wiggler magnet device according to the present invention.
The same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted. Here, different points will be described.

In the fifteenth embodiment, a vacuum valve 3 is provided between the beam duct 11 and the vacuum vessel 17 as shown in FIG.
1 through a communication pipe 32.

With such a configuration, when the beam duct 11 and the vacuum vessel 17 are evacuated during a factory test or the like, the vacuum valves 31 are opened to communicate with each other, and each of them is brought to about a vacuum (for example, 0.1 Torr). At this point, the vacuum valves 31 are closed, and each of them is evacuated to a predetermined degree of vacuum.

Therefore, the internal and external pressures can be prevented from acting on the beam duct 11, and the wall thickness of the beam duct 11 can be reduced.

Note that the vacuum valve 31 may be an automatic valve, and sequence control may be performed with each degree of vacuum and a vacuum exhaust system (not shown).

FIG. 16 shows a vacuum valve 31 according to the eleventh embodiment.
Instead of this, the communication between the beam duct 11 and the vacuum vessel 17 is established by a communication pipe 32 via an orifice 33 having a predetermined conductance.

Even with such a configuration, it is possible to operate the beam duct 11 and the vacuum vessel 17 with a predetermined degree of vacuum while avoiding a human error in opening and closing the vacuum valve 31.
FIG. 17 is a perspective view of a superconducting coil according to a twelfth embodiment of the superconducting wiggler magnet device according to the present invention, which can reliably prevent the internal and external pressures from acting on the beam duct 11.

In the twelfth embodiment, as shown in FIG. 17, a superconducting coil 12 is constituted by a plurality of coils consisting of a main coil 39 and a sub coil 40, and the main coil 39 and the sub coil 40 are not shown separately. Is connected to the exciting power supply. In this case, the sub coil 40 is
9 is desirably disposed on the side opposite to the beam duct 11.

Since other configurations are the same as those of the first embodiment, the description is omitted here.

With the superconducting coil 12 having such a configuration, the main coil 39 and the sub coil 40 can be excited independently of each other. When starting up to a current, a low magnetic field portion having a large AC loss can be avoided.

Therefore, the AC loss when the main coil 39 is excited can be greatly reduced. Further, by keeping the magnetic field of the electron beam path 11a at a predetermined low magnetic field, the startup of the electron beam 41 becomes easy.

FIG. 18 shows a superconducting coil 12 different from the above.
In this example, the sub-coil 40 is concentrically arranged on the outer periphery of the main coil 39.

With the superconducting coil 12 having such a configuration, in addition to the function and effect of the twelfth embodiment, a gentle magnetic field distribution in the longitudinal direction of the beam duct 11 can be realized by exciting only the sub-coil 40. In addition, the divergence angle of the scattered radiation 10a can be suppressed to a small value to prevent the scattered radiation 10a from hitting the beam duct 11.

[0156]

As described above, according to the present invention, it is possible to prevent the scattered radiation from hitting the beam duct without increasing the distance between the upper and lower superconducting coils, and to prevent heat from penetrating into the superconducting coil from the beam duct. Because it can reduce the electromagnetic force due to AC loss and eddy current during excitation, even if it is multi-pole and long in the longitudinal direction, it has high performance and excellent structural integrity.
A highly reliable superconducting wiggler magnet device can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a superconducting wiggler magnet device according to the present invention.

FIG. 2 is a sectional view taken along the line CC of FIG. 1;

FIG. 3 is a perspective view showing the beam duct according to the embodiment cut away.

FIG. 4 is a sectional view of a magnet assembly in the second and third embodiments of the superconducting wiggler magnet device according to the present invention.

FIG. 5 is a sectional view showing a modification of the second and third embodiments of the present invention.

FIG. 6 is a magnetic field distribution diagram for explaining a fourth embodiment of the superconducting wiggler magnet device according to the present invention.

FIG. 7 is a sectional view showing a fifth embodiment of the superconducting wiggler magnet device according to the present invention.

FIG. 8 is a cross-sectional view of a superconducting wiggler magnet device using an adjusting screw as a gap adjusting unit in the embodiment.

FIG. 9 is a cutaway perspective view showing a beam duct in a sixth embodiment of a superconducting wiggler magnet device according to the present invention.

FIG. 10 is an explanatory diagram of a duct radiation shield in a superconducting wiggler magnet device according to a seventh embodiment of the present invention.

FIG. 11 is an explanatory diagram of a duct radiation shield in an eighth embodiment of the superconducting wiggler magnet device according to the present invention.

FIG. 12 is an explanatory view of a duct radiation shield in a ninth embodiment of a superconducting wiggler magnet device according to the present invention.

FIG. 13 is an explanatory diagram of a modified example of the duct radiation shield in the embodiment.

FIG. 14 is a longitudinal sectional view showing a tenth embodiment of a superconducting wiggler magnet device according to the present invention.

FIG. 15 is a longitudinal sectional view showing an eleventh embodiment of a superconducting wiggler magnet device according to the present invention.

FIG. 16 is a longitudinal sectional view showing a modification of the embodiment.

FIG. 17 is a perspective view of a superconducting coil in a twelfth embodiment of the superconducting wiggler magnet device according to the present invention.

FIG. 18 is an exemplary perspective view showing a modification of the superconducting coil according to the embodiment;

FIG. 19 is a schematic explanatory view of a synchrotron radiation diagnostic apparatus to which the superconducting wiggler magnet device of the present invention is applied.

FIG. 20 is a longitudinal sectional view showing a conventional superconducting wiggler magnet device.

21 is a sectional view taken along the line AA of FIG. 20;

FIG. 22 is a sectional view taken along the line BB in FIG. 20;

FIG. 23 is a diagram illustrating the principle of generation of emitted light.

FIG. 24 is an excitation circuit diagram using one parallel resistor for a plurality of superconducting coils of a conventional superconducting wiggler magnet device.

FIG. 25 is an excitation circuit diagram using a parallel resistance for each superconducting coil of the conventional superconducting wiggler magnet device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electron injector 2 ... Synchrotron radiation ring 3 ... Bending electromagnet 4 ... Quadrupole electromagnet 5 ... Acceleration cavity 6 ... Superconducting wiggler magnet device 7 ... Monochromator 8 ... Patient 9 ... High-speed image processing system 10 ... Synchrotron radiation 10a ... Scattering Synchrotron radiation 11 ... beam duct 11a ... electron beam path 11b ... scattered radiation path yoke 12 ... superconducting coil 13 ... yoke 14 ... magnet assembly 15 ... cooling means 16 ... radiation shield 17 ... vacuum vessel 18 ... duct radiation shield 19 ... space piece 20 ... Coil storage case 21 ... Top lid 22 ... Iron core container 23 ... Magnetic material iron core 24 ... Cooling tube 25 ... Light receiving plate 26 ... Bellows 27 ... Heat insulation spacer 28 ... Ceramics 29 ... Heat transfer layer 30 ... Thermal anchor 31 ... Vacuum valve 32 ... Communication Pipe 33 ... Orifice 34 ... Curable resin 35 ... Fluorine resin 36 ... Wedge 37 ... Lye Over 38 ... adjustment screw 39 ... main coil 40 ... sub-coil 41 ... electron beam

Continuation of the front page (72) Inventor Tsukasa Wada 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Works Co., Ltd. (72) Inventor Tsutomu Kurusu 2-4-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Co., Ltd. Inside the Toshiba Keihin Works (72) Inventor Kosuke Sato 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture F-term in the Toshiba Yokohama Works 2G085 AA13 BA16 BC01 BC18 BE01 DB08 EA07

Claims (27)

[Claims] 1. A vacuum container, and a magnet assembly having a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container in a longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. In the wiggler magnet device, a scattered radiation optical path is formed on both sides of an electron beam path formed at the lateral center of the beam duct, and the height of the scattered radiation optical path is lower than the height of the electron beam path. A superconducting wiggler magnet device characterized in that the width is higher than the scattering width of scattered radiation. 2. The superconducting wiggler magnet device according to claim 1, wherein an inclined surface is formed in the scattered radiation optical path such that at least a tip portion thereof is narrowed. 3. The superconducting wiggler magnet device according to claim 1, wherein a cooling pipe is attached to the scattered radiation light path side of the beam duct. 4. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container are provided in parallel in a longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. A superconducting wiggler magnet device, wherein the superconducting coil is housed in a coil housing case. 5. The superconducting wiggler magnet device according to claim 4, wherein the innermost side of the coil storage case is formed of an iron core container, and a magnetic core is mounted on the iron core container. 6. The superconducting wiggler magnet device according to claim 5, wherein the iron core container is fixed to an upper lid fixed to the coil storage case. 7. The superconducting wiggler magnet device according to claim 4, wherein a gap between the superconducting coil and the coil housing case is filled with a curable resin. 8. The superconducting wiggler magnet device according to claim 5, wherein a fluorocarbon resin is applied to at least one of the opposing surfaces of the superconducting coil and the coil housing case. 9. The superconducting wiggler magnet device according to claim 4, wherein a wedge is mounted in a gap between the superconducting coil and the coil housing case. 10. The superconducting wiggler magnet device according to claim 5, wherein the material of the magnetic iron core is permendur. 11. The superconducting wiggler magnet device according to claim 5, wherein a hardening resin is filled in a gap between the iron core container and the magnetic material iron core. 12. The superconducting wiggler magnet device according to claim 5, wherein a wedge is mounted in a gap between the iron core container and the magnetic material iron core, and the magnetic material iron core is fixed to the iron core container. 13. The superconducting wiggler magnet device according to claim 5, wherein at least one of the surfaces opposing the beam duct of the magnetic material iron core is formed in a shape capable of satisfying a required magnetic field distribution. . 14. The superconducting wiggler magnet device according to claim 5, further comprising an interval adjusting means for adjusting an interval at which the magnetic material iron core opposes the beam duct. 15. The superconducting wiggler magnet device according to claim 14, wherein the distance adjusting means has a liner mounted between the iron core container and the magnetic core. 16. The superconducting wiggler magnet device according to claim 14, wherein the distance adjusting means is such that an iron core container and a magnetic iron core are attached with an adjusting screw. 17. A vacuum container, and a magnet assembly having a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container in a longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; a radiation shield provided so as to surround the magnet assembly and the cooling means; A superconducting wiggler magnet device, wherein light receiving plates are provided on both sides of the beam duct in the width direction of the electron beam path. 18. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container are provided in parallel in a longitudinal direction of the beam duct. A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. In the wiggler magnet device, a duct radiation shield is arranged between the beam duct and the superconducting coil, and between the superconducting coil and the duct radiation shield and between the beam duct and the duct radiation shield. A superconducting wiggler magnet device comprising an insulating spacer. 19. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container are provided in parallel in a longitudinal direction of the beam duct. A superconducting window which includes a cooling means for cooling the magnet assembly to a cryogenic temperature, a radiation shield provided to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation ring to generate radiation light. A superconducting wiggler magnet device, wherein a duct radiation shield is provided between the beam duct and the superconducting coil, and at least a part of the duct radiation shield in the thickness direction is made of ceramics. . 20. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other with a beam duct forming an electron beam path therebetween in the vacuum container are provided in parallel in a longitudinal direction of the beam duct. A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. In the wiggler magnet device, a duct radiation shield is provided between the beam duct and the superconducting coil, and the material of the duct radiation shield is either an electrically insulating material or a metal material having a high electric resistance, and has a thickness. A superconducting wiggler characterized in that a heat transfer layer made of a good heat conductive material is applied on at least one side in the direction. Magnet device. 21. The heat transfer layer is formed in a comb shape in which one end of a plurality of teeth is short-circuited in a longitudinal direction.
0 superconducting wiggler magnet device. 22. A vacuum container, and a magnet assembly having a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container in the longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. A superconducting wiggler magnet device, wherein the beam duct and at least one of the radiation shield and the cooling means are thermally connected by a thermal anchor having a predetermined thermal resistance. 23. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container are arranged in parallel in a longitudinal direction of the beam duct. A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. A superconducting wiggler magnet device, wherein the beam duct and the vacuum vessel are connected by a communication pipe via a vacuum valve. 24. A vacuum container, and a magnet assembly in which a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum container are arranged in parallel in a longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. A superconducting wiggler magnet device, wherein the beam duct and the vacuum vessel are communicated with each other by a communication pipe having a predetermined conductance. 25. A magnet assembly comprising: a vacuum vessel; and a plurality of pairs of superconducting coils vertically opposed to each other across a beam duct forming an electron beam path in the vacuum vessel in a longitudinal direction of the beam duct; A superconducting device comprising: cooling means for cooling the magnet assembly to a cryogenic temperature; and a radiation shield provided so as to surround the magnet assembly and the cooling means, and which is installed as an insertion light source in a radiation light ring to generate radiation light. In the wiggler magnet device, each of the superconducting coils is constituted by a plurality of coils each including a main coil and a sub coil, and the main coil and the sub coil are connected to separate excitation power supplies. apparatus. 26. The superconducting wiggler magnet device according to claim 25, wherein the sub coil is disposed on the side of the main coil opposite to the beam duct. 27. The superconducting wiggler magnet device according to claim 25, wherein the sub coil is disposed concentrically on the outer periphery of the main coil.