GB1129254A - Improved magnetic circuit and crossed field tubes using same - Google Patents

Improved magnetic circuit and crossed field tubes using same

Info

Publication number
GB1129254A
GB1129254A GB22897/66A GB2289766A GB1129254A GB 1129254 A GB1129254 A GB 1129254A GB 22897/66 A GB22897/66 A GB 22897/66A GB 2289766 A GB2289766 A GB 2289766A GB 1129254 A GB1129254 A GB 1129254A
Authority
GB
United Kingdom
Prior art keywords
magnet
magnetic circuit
electrode
members
same
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB22897/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1129254A publication Critical patent/GB1129254A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/54—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes
    • H01J25/56—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes with interdigital arrangements of anodes, e.g. turbator tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path

Landscapes

  • Microwave Tubes (AREA)

Abstract

1,129,254. Magnetrons. VARIAN ASSOCIATES. 23 May, 1966 [25 May, 1965], No. 22897/66, Heading H1D. In a voltage-tunable magnetron comprising an electron injection region 46 formed between cathode 13 and control electrode 17 and an eletronic interaction region 45 formed between central electrode 18 and an interdigital anode circuit 22, the magnetic circuit comprises two permanent magnets 5, 6 designed to produce a field of greater intensity in the injection region 46 decreasing to a lower but uniform intensity in the interaction region 45, the magnet 5 being longer and of greater magnetomotive force than the magnet 6. The tube envelope 2 comprises a stack of conductive and ceramic discs and members 34<SP>1</SP>, 35<SP>1</SP> brazed across the ceramic end disc 12 provide connections to the cathode filament leads 14, 15. Insulating, sheets 42 are provided between the members 34<SP>1</SP>, 35<SP>1</SP> and the magnet 5 and between the electrode 18 and the magnet 6. The tube elements and the magnets are encased in epoxy resin potting material- 44 within a magnetic shield 7.
GB22897/66A 1965-05-25 1966-05-23 Improved magnetic circuit and crossed field tubes using same Expired GB1129254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US458617A US3392308A (en) 1965-05-25 1965-05-25 Crossed field tube having a pair of permanent magnets of different magn etomotive force

Publications (1)

Publication Number Publication Date
GB1129254A true GB1129254A (en) 1968-10-02

Family

ID=23821468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22897/66A Expired GB1129254A (en) 1965-05-25 1966-05-23 Improved magnetic circuit and crossed field tubes using same

Country Status (3)

Country Link
US (1) US3392308A (en)
DE (1) DE1541087A1 (en)
GB (1) GB1129254A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6806783A (en) * 1968-05-14 1969-11-18
US3989979A (en) * 1974-08-03 1976-11-02 Matsushita Electric Industrial Co., Ltd. Magnetron employing a permanent magnet formed of a manganese-aluminum-carbon system alloy
US4071804A (en) * 1975-01-31 1978-01-31 Tokyo Shibaura Electric Co., Ltd. Magnetron device having magnetic means for generating a uniform interaction field
JPS51126752A (en) * 1975-04-25 1976-11-05 Toshiba Corp Magnetron
US4104559A (en) * 1976-11-01 1978-08-01 Microwave Associates, Inc. Isopolar magnetron supported with rigid insulation in a remote housing
US5635798A (en) * 1993-12-24 1997-06-03 Hitachi, Ltd. Magnetron with reduced dark current
GB0404446D0 (en) * 2004-02-27 2004-03-31 E2V Tech Uk Ltd Electron beam tubes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473547A (en) * 1945-09-28 1949-06-21 Raytheon Mfg Co Electron discharge device
US2939046A (en) * 1958-06-16 1960-05-31 Gen Electric Electron beam control
US3229152A (en) * 1961-10-19 1966-01-11 Gen Electric Magnetron having evacuated discharge subassembly united with unevacuated magnetic andresonant cavity structure
NL295449A (en) * 1963-07-17

Also Published As

Publication number Publication date
DE1541087A1 (en) 1969-09-11
US3392308A (en) 1968-07-09

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