JPH08148297A - Charged particle apparatus - Google Patents

Abstract

PURPOSE: To make charged particle beam which is emitted out of a charged particle apparatus be rotated and radiated and moreover converged on one point. CONSTITUTION: A charged particle apparatus composed of an incidence part 4, a circular part 9, and an emission part 11 is mounted on a rotary supporting stand 26, the rotary stand 26 is made possible to rotate on a rotary axis 28 in order to make the emission direction of charge particle beam 12 of the emission part 11 variable, and the emission direction is so set as to converge on one point in the rotary axis 28. Consequently, since the charge particle beam 12 is converged on one point, if the beam is rotated and radiated while a diseased part being conformed with the converged point at the time of radiotherapy, the diseased part is radiated with high dose of the beam and at the same time radiation to other parts is diffused in the rotary face and the exposure of the normal tissue parts to the beam can be suppressed to the minimum level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charged particle device for transporting, accelerating or accumulating charged particles such as electrons and protons at high energy for use in elementary particle research and cancer cell killing.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing a conventional charged particle device disclosed in, for example, Japanese Patent Application Laid-Open No. 1-107500. In the figure, (1) is an injector that pre-accelerates by generating charged particles such as electrons and protons, (2) is an injection line that transports charged particles from the injector (1), and (3) is an injection line (2 ) Is an incident electromagnet that introduces the charged particle beam into the annular portion described later, and these injector (1), injection line (2) and incident electromagnet
The incident part (4) is constituted by (3) and the like.

(5) and (5a) are vacuum chambers for transporting charged particles, (6) and (6a) are provided around the vacuum chambers (5) and (5a) for deflecting charged particles, and (7) (6) 7a) is a converging quadrupole electromagnet for converging the charged particle beam, and (8) is a high-frequency acceleration cavity for accelerating the charged particles, which includes a vacuum chamber (5), a deflection electromagnet (6), and a converging quadrupole electromagnet (7). The high frequency acceleration cavity (8) and the like form the annular portion (9). (10) is an output electromagnet that guides the charged particle beam in the vacuum chamber (5) in the output direction. The output of the vacuum chamber (5a), the deflection electromagnet (6a) and the converging quadrupole electromagnet (7a) is inside the annular part (9). An emission part (11) for bending and emitting the charged particle beam in (1) is formed. (12) is the outgoing charged particle beam.

Next, the operation will be described. The charged particles ionized by the injector (1) are guided to the incident electromagnet (3) by the injection line (2). The orbit of the incident electromagnet (3) is modified so that the charged particles that have been incident orbit the circular vacuum chamber (5). The beam width of the charged particles introduced into the vacuum chamber (5) of the annular portion (9) is narrowed down by the converging quadrupole electromagnet (7), and the beam traveling direction is bent by the deflection electromagnet (6). This is sequentially repeated so that the charged particles circulate in the vacuum chamber (5) of the annular portion (9). High-frequency acceleration cavity (8) due to energy loss during orbit
Is further accelerated by. After the charged particles circulate in the vacuum chamber (5) a predetermined number of times in this way, the output electromagnet
The beam traveling direction is bent by (10) and guided to the vacuum chamber (5a) of the emitting part (11), bent by the deflection electromagnet (6a) and converged by the quadrupole electromagnet (7a), and the beam width is narrowed and emitted in a desired direction. To be done. The emission beam (12) emitted from the emission unit (11) is applied to the target object.

[0005]

Since the conventional charged particle device is constructed as described above, the outgoing beam extraction direction is fixed and only one object can be irradiated.
Moreover, in order to irradiate a plurality of objects, a plurality of branch lines must be further provided from the emitting portion, which is a problem.

The present invention has been made to solve the above problems, and an object thereof is to obtain a charged particle device capable of extracting an outgoing charged particle beam in an arbitrary direction.

Another object of the present invention is to obtain a charged particle device capable of concentrating outgoing charged particle beams from different directions at one point.

[0008]

The charged particle device according to claim 1 of the present invention comprises a rotatable support table, an entrance portion, and a rotary support table.
The annular portion and the emitting portion are integrally mounted.

According to a second aspect of the present invention, in the charged particle apparatus according to the first aspect, the rotary support of the charged particle apparatus according to the first aspect can be rotated about an axis orthogonal to the mounting surface of the entrance portion, the annular portion and the exit portion. It is what

According to a third aspect of the present invention, in the charged particle device according to the second aspect, the mounting surfaces of the incident part, the annular part and the emission part of the charged particle device according to the second aspect are horizontal, and the charged particle device according to the fourth aspect is the above. The mounting surface is a vertical surface.

According to a fifth aspect of the present invention, in the charged particle apparatus according to the first aspect, the rotary support of the charged particle apparatus according to the first aspect is centered on an axis in a direction along a mounting surface of the entrance portion, the annular portion and the exit portion. I was able to rotate.

A charged particle device according to a sixth aspect of the present invention is the charged particle device according to the second, third, fourth or fifth aspect, wherein the charged particle emission direction is directed to a point on the rotation axis of the rotary support. The emission part is arranged.

[0013]

According to the invention described in claim 1 of the present invention, since the support base integrally mounted on the entrance portion, the annular portion and the exit portion is rotatable, the exit portion is also rotated by the rotation of the entire apparatus,
The outgoing charged particle beam can be extracted in any direction.

According to the second, third and fourth aspects of the present invention, the rotary support is centered on an axis which is a horizontal plane or a vertical plane and which is orthogonal to the mounting surfaces of the entrance portion, the annular portion and the exit portion. Since the entire apparatus is rotated along the mounting surface, the outgoing charged particle beam can be taken out in an arbitrary angular direction within the mounting surface such as horizontal or vertical.

According to the invention of claim 5 of the present invention, the rotary support can be rotated about the axis in the direction along the mounting surface of the entrance portion, the annular portion and the exit portion.
The entire apparatus rotates along the plane orthogonal to the mounting surface, and the emitted charged particle beam can be taken out in any direction within the plane orthogonal to the mounting surface.

According to the sixth aspect of the present invention, since the emitting portion is arranged so that the charged particle emitting direction is directed to one point on the rotation axis of the rotary support, the direction of the emitted charged particle beam changes. But always focus on one point.

[0017]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view showing the first embodiment. In the figure, (1) is an injector, (2) is an injection line, (3) is an incident electromagnet, (4) is composed of these injectors (1), injection line (2) and incident electromagnet (3), etc. Incident part, (5) and (5a) are vacuum chambers, (6) and (6a) are deflection electromagnets, (7) and (7a) are focusing quadrupole electromagnets, (8) is a high-frequency acceleration cavity, and (9) is a vacuum. Chamber (5), deflection electromagnet (6), focusing quadrupole electromagnet (7) and high frequency acceleration cavity
An annular part composed of (8), etc., (10) an output electromagnet, (11) an output electromagnet (10), a vacuum chamber (5a), a deflection electromagnet (6a) and a converging quadrupole electromagnet (7a) An emitting portion, (12), is an emitted charged particle beam, and the above is the same as the conventional example shown in FIG.

Reference numeral (20) denotes an entrance portion (4), an annular portion (9) and an exit portion (1
A horizontal rotary support that integrally mounts the entire device consisting of 1) on its horizontal mounting surface (21), (22) a rotary axis orthogonal to the horizontal mounting surface (21), and (23) generating rotational force. Drives such as motors,
Reference numeral (24) is a rotation transmission roller for transmitting the rotational force of the driving machine (23) to the rotation support base (20), and (25) is a support roller for rotatably supporting the rotation support base (20).

Next, the operation will be described. Charged particles from the injector (1) are injected by the injection line (2) into the incident electromagnet (3).
Is introduced into the vacuum chamber (5) of the annular portion (9), the beam width is narrowed by the converging quadrupole electromagnet (7), and further deflected by the deflection electromagnet (6). It is accelerated by the high-frequency acceleration cavity (8) and goes around in the vacuum chamber (5) of the annular portion (9). After the charged particles circulate a predetermined number of times in this way, the beam traveling direction is bent by the output electromagnet (10) and is guided to the vacuum chamber (5a) of the output unit (11), and is bent by the deflection electromagnet (6a) and converges. The beam width is narrowed down by the polar electromagnet (7a) and emitted in a desired direction. The emitted charged particle beam (12) emitted from the emission part (11) is applied to a target object. The above is the same as the conventional example.

Next, the driving machine (23) is urged to rotate the rotation transmitting roller.
When the horizontal rotation support base (20) is rotated about the rotation axis (22) by the drive of (24), the incident part (4), the annular part (9) and the emission part (11) are all horizontally rotated in accordance with the rotation. To do. Therefore, the direction of the charged particle beam (12) emitted from the emitting part (11) is also changed, and it can be directed to an arbitrary angular direction in the horizontal plane.

Example 2. FIG. 2 is a perspective view showing a second embodiment, in which (1) is an injector, (2) is an injection line, and (3).
Is an incident electromagnet, (4) is an incident part, (5) and (5a) are vacuum chambers,
(6) (6a) is a deflection electromagnet, (7) (7a) is a converging quadrupole electromagnet, (8)
Is a high frequency acceleration cavity, (9) is an annular part, (10) is an output electromagnet,
(11) is an emission part, (12) is an emitted charged particle beam, (23) is a driving machine, (24) is a rotation transmission roller, and (25) is a support roller. The above is the same as the first embodiment shown in FIG. Similarly, these operations are also the same as those in the first embodiment, and the description thereof will be omitted.

Reference numeral (26) denotes an entrance portion (4), an annular portion (9) and an exit portion (1
A vertical rotation support stand for integrally mounting the entire device consisting of 1) on its vertical mounting surface (27), and (28) is a rotation axis orthogonal to the vertical mounting surface (27).

With the above structure, when the vertical rotation support base (26) is rotated about the rotation shaft (28) by energizing the driving machine (23) and driving the rotation transmission roller (24), the incident light is incident accordingly. Department
(4), the annular portion (9) and the emitting portion (11) as a whole rotate vertically. Therefore, the direction of the charged particle beam (12) emitted from the emission part (11) is also changed, and it can be directed to an arbitrary angular direction in the vertical plane.

Example 3. FIG. 3 is a perspective view showing a third embodiment, in which (1) is an injector, (2) is an injection line, and (3).
Is an incident electromagnet, (4) is an incident part, (5) and (5a) are vacuum chambers,
(6) (6a) is a deflection electromagnet, (7) (7a) is a converging quadrupole electromagnet, (8)
Is a high frequency acceleration cavity, (9) is an annular part, (10) is an output electromagnet,
(11) is an emission part, (12) is an emitted charged particle beam, (23) is a driving machine, (24) is a rotation transmission roller, and (25) is a support roller. The above is the embodiment shown in FIGS. The operations are the same as those of the first and second embodiments, and the operations thereof are also the same as those of the first and second embodiments, and therefore the description thereof is omitted.

Reference numeral (29) denotes an entrance portion (4), an annular portion (9) and an exit portion (1
A rotation support stand for integrally mounting the entire device consisting of 1) on its mounting surface (30), (31) is provided on the rotation support stand (29), and the rotation support stand (29) is mounted on the mounting surface (30). This is a rotation support rod that is rotatable around a rotation axis (32) in the direction along the rotation axis.

With the above structure, the rotary support rod (31) is rotated by urging the driving machine (23) to drive the rotation transmission roller (24), thereby rotating the rotary support base (29) to the rotary shaft (32). When it is rotated about, the incident part (4), the annular part (9), and the emitting part (11) are all rotated correspondingly along a plane orthogonal to the mounting surface (30). Therefore, the direction of the charged particle beam (12) emitted from the emitting part (11) is also changed, and it can be directed to an arbitrary angular direction in the plane orthogonal to the mounting surface (30).

In the first and second embodiments described above, the rotary support was rotated along the horizontal or vertical plane, and in the third embodiment along the plane orthogonal to the mounting surface. It is possible to rotate along an inclined surface of an angle or to rotate about an axis inclined at an arbitrary angle with the mounting surface. In addition, by supporting the rotation support base so as to be rotatable about two rotation axes that are orthogonal to each other,
Dimensional rotation is also possible.

Example 4. FIG. 4 is a perspective view showing Embodiment 4, in which (1) is an injector, (2) is an injection line, and (3).
Is an incident electromagnet, (4) is an incident part, (5) and (5a) are vacuum chambers,
(6) (6a) is a deflection electromagnet, (7) (7a) is a converging quadrupole electromagnet, (8)
Is a high frequency acceleration cavity, (9) is an annular part, (10) is an output electromagnet,
(11) is an output unit, (12) is an output charged particle beam, (20) is a horizontal rotary support, (21) is a horizontal mounting surface, (22) is a rotary shaft, (23) is a drive machine, (24) Is a rotation transmission roller, (25) is a support roller,
The above is the same as that of the first embodiment shown in FIG.

(6b) shows the outgoing charged particle beam (12) with the rotation axis (2
2) A deflecting electromagnet that deflects in the direction of the beam focusing point (33), which is one of the above points, and (34) is an exit beam transport line that transports and emits charged particles in the direction of the beam focusing point (33). It forms part of 11).

With the above structure, the driving machine (23) is energized and the rotation transmission roller (24) is driven to rotate the horizontal rotation support base (20) about the rotation shaft (22), and the charged particle beam (12) is rotated. ), The charged particle beam (12) still has a rotation axis (2
2) The charged particle beam (12) is always directed toward the beam focusing point (33) regardless of the rotation position of the horizontal rotary support (20) because it is emitted toward the beam focusing point (33) which is one point on the top. It is focused from multiple directions. Therefore, in radiation therapy, etc., if the affected area is rotated and irradiated at the focal point (33), a high dose is irradiated to the lesion area, but the irradiation to other areas is dispersed in the horizontal plane, and normal tissue is exposed to radiation. Can be kept to a minimum.

Example 5. FIG. 5 is a perspective view showing Example 5, in which (1) is an injector, (2) is an injection line, and (3).
Is an incident electromagnet, (4) is an incident part, (5) and (5a) are vacuum chambers,
(6) (6a) is a deflection electromagnet, (7) (7a) is a converging quadrupole electromagnet, (8)
Is a high frequency acceleration cavity, (9) is an annular part, (10) is an output electromagnet,
(11) is an output unit, (12) is an output charged particle beam, (23) is a driving machine, (24) is a rotation transmission roller, (25) is a support roller, (26) is a vertical rotation support, (27) Is the vertical mounting surface, (28) is the rotation axis,
The above is the same as that of the second embodiment shown in FIG. Further, (33) is a beam focusing point that is one point on the rotation axis (28), (6b) is a deflecting electromagnet that deflects the outgoing charged particle beam (12) in the direction of the beam focusing point (33), and (34) is The outgoing beam transport line is similar to that of the fourth embodiment shown in FIG.

With the above construction, the driving machine (23) is energized and the rotation transmission roller (24) is driven to rotate the vertical rotation support base (26) about the rotation axis (28), and the charged particle beam (12) ), The charged particle beam (12) still has a rotation axis (2
8) The charged particle beam (12) is always directed toward the beam focusing point (33) regardless of the rotation position of the vertical rotation support (26) because it is emitted toward the beam focusing point (33) which is one point on the above. It is focused from multiple directions. Therefore, in radiation treatment, etc., if the affected area is rotated and irradiated at the focal point (33), a high dose is irradiated to the lesion area, but the irradiation to other areas is dispersed in the vertical plane, and the normal tissue is irradiated. The exposure can be kept to a minimum.

Example 6. FIG. 6 is a perspective view showing Example 6, (1) is an injector, (2) is an injection line, (3) is an incident electromagnet, (4) is an incident part, (5) and (5a) are vacuum chambers, (6) (6a) is a deflection electromagnet, (7) (7a) is a converging quadrupole electromagnet, (8) is a high frequency acceleration cavity, (9) is an annular part, (10) is an exit electromagnet, and (11) is an exit. , (12) is an outgoing charged particle beam, (23) is a driving machine, (24) is a rotation transmission roller, (25) is a support roller, (29) is a rotation support base, (30) is a mounting surface, and (31) ) Is a rotary support rod, and (32) is a rotary shaft. The above is the same as that of the third embodiment shown in FIG. Also (33)
Is a beam focusing point, (6b) is a deflecting electromagnet, and (34) is an outgoing beam transport line, which is similar to that of the fourth embodiment shown in FIG.

With the above structure, the rotation support bar (31) is rotated by urging the driving machine (23) to drive the rotation transmission roller (24), thereby rotating the rotation support base (29) to the rotation shaft (32). Even if the charged particle beam (12) is rotated about its center to change the emitting direction of the charged particle beam (12), the charged particle beam (12) is emitted toward the beam focusing point (33), which is one point on the rotation axis (32). Therefore, the charged particle beam (12) is always directed to the beam focusing point (33) regardless of the rotation position of the rotary support (29), and is focused from one direction to another. Therefore, the affected area should be focused on
High-dose irradiation will be applied to the lesion area by rotating according to the above, but irradiation to other areas will be dispersed in the plane orthogonal to the mounting surface, and exposure to normal tissue can be minimized. .

[0035]

According to the first aspect of the present invention, since the incident part, the annular part and the emitting part are integrally mounted on the rotatable rotary support, the emitting part is also rotated by the rotation of the entire apparatus. ,
The outgoing charged particle beam can be extracted in any direction,
There is an effect that it is possible to easily irradiate a plurality of objects.

According to the second, third and fourth aspects of the present invention, the rotary support table can be rotated about an axis which is a horizontal plane or a vertical plane and which is orthogonal to the mounting surface of the entrance portion, the annular portion and the exit portion. Therefore, the entire apparatus rotates along the mounting surface, and the emitted charged particle beam can be taken out in any angle direction within the mounting surface such as horizontal or vertical, and a plurality of objects in the mounting surface can be extracted. There is an effect that it can be easily irradiated.

According to the fifth aspect of the present invention, the rotation support base is configured to be rotatable about the rotation axis in the direction along the mounting surface of the entrance portion, the annular portion and the exit portion. The entire apparatus rotates along a plane orthogonal to the, and the emitted charged particle beam can be taken out in an arbitrary direction within a plane orthogonal to the mounting surface. There is an effect that irradiation can be performed easily.

According to the sixth aspect of the invention, since the emitting portion is arranged so that the charged particle emitting direction is directed to one point on the rotation axis of the rotary support, even if the direction of the emitted charged particle beam changes. Always focus on one point, and if the affected area is rotated and irradiated during radiation treatment, etc., the lesion area will be irradiated with a high dose and the irradiation to other areas will be dispersed in the rotating plane, and This has the effect of minimizing exposure to radiation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective view showing a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing a fifth embodiment of the present invention.

FIG. 6 is a perspective view showing Embodiment 6 of the present invention.

FIG. 7 is a perspective view showing a conventional charged particle device.

[Explanation of symbols]

4 injection part, 5 vacuum chamber, 9 annular part, 11 exit part, 12 output charged particle beam, 20 horizontal rotation support, 21 horizontal mounting surface, 22 horizontal rotation axis, 26 vertical rotation support, 27 vertical mounting surface, 28 Vertical axis of rotation, 2
9 rotation support base, 30 mounting surface, 32 rotation shaft, 33
Beam focus point.

Claims (6)

[Claims] 1. An annular portion for transporting, accelerating or accumulating charged particles in an annular vacuum chamber, an entrance portion for introducing ionized charged particles into the annular portion, and a beam traveling of the charged particles in the annular portion. In a charged particle device provided with an emitting unit that bends a direction by a predetermined angle and emits charged particles, the incident unit, the annular unit, and the emitting unit are integrally mounted on a rotatable rotary support, and the charging of the emitting unit is performed. A charged particle device having a variable particle emission direction. 2. The charged particle device according to claim 1, wherein the rotary support is rotatable about an axis orthogonal to the mounting surface of the entrance portion, the annular portion and the exit portion. 3. The charged particle device according to claim 2, wherein the mounting surfaces of the entrance portion, the annular portion and the exit portion are horizontal surfaces. 4. The charged particle device according to claim 2, wherein the mounting surfaces of the entrance portion, the annular portion and the exit portion are vertical surfaces. 5. The charged particle device according to claim 1, wherein the rotary support is configured to be rotatable about an axis in a direction along a mounting surface of the entrance portion, the annular portion and the exit portion. 6. The charged particle according to claim 2, wherein the emitting portion is arranged so that the charged particle emitting direction is directed to one point on the rotation axis of the rotary support. apparatus.