GB1069672A - High frequency electron tube apparatus - Google Patents

High frequency electron tube apparatus

Info

Publication number
GB1069672A
GB1069672A GB50256/63A GB5025663A GB1069672A GB 1069672 A GB1069672 A GB 1069672A GB 50256/63 A GB50256/63 A GB 50256/63A GB 5025663 A GB5025663 A GB 5025663A GB 1069672 A GB1069672 A GB 1069672A
Authority
GB
United Kingdom
Prior art keywords
anode
magnetic field
emitter
cathode
cathode emitter
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
GB50256/63A
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 GB1069672A publication Critical patent/GB1069672A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof
    • 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
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/029—Schematic arrangements for beam forming

Abstract

1,069,672. Travelling wave tubes; klystrons. VARIAN ASSOCIATES. Dec. 19, 1963 [Jan. 22, 1963], No. 50256/63. Heading H1D. An electron gun for a high-power discharge tube, e.g. a travelling-wave tube or a klystron, comprises a cathode emitter 22 for generating an electron beam to pass through an apertured anode structure 24, the area of the aperture being smaller than the area of the emissive surface 22, wherein the cathode emitter and the anode aperture are immersed in a converging magnetic field and a magnetic member 37 in the form of a hollow cylindrical member surrounds the cathode emitter and perturbs the magnetic field in the vicinity of the cathode emitter so as to increase the rate of convergence of the magnetic field and so as to cause the magnetic field lines substantially to follow the electric field lines between the cathode and anode. The anode structure comprises a modulating anode 20 having a longitudinally extending tube 29 and a main anode 25. A focusing electrode 34 following the contours of the concave emitter is located between the emitter and the magnetic member; coils 41 having a long heatconducting path spacing the focusing electrode from the shim. The electron beam is focused down the length of the discharge tube by a main magnetic field set up between two polepieces, one of which, 17, is spaced from and surrounds the shim.
GB50256/63A 1963-01-22 1963-12-19 High frequency electron tube apparatus Expired GB1069672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US253178A US3331984A (en) 1963-01-22 1963-01-22 Magnetic field shaping cylinder for confined flow electron guns

Publications (1)

Publication Number Publication Date
GB1069672A true GB1069672A (en) 1967-05-24

Family

ID=22959198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50256/63A Expired GB1069672A (en) 1963-01-22 1963-12-19 High frequency electron tube apparatus

Country Status (5)

Country Link
US (1) US3331984A (en)
DE (1) DE1439883A1 (en)
FR (1) FR1378524A (en)
GB (1) GB1069672A (en)
SE (1) SE308761B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522469A (en) * 1968-04-12 1970-08-04 Varian Associates Magnetic beam focusing structure for a traveling wave tube employing magnetic shunts between the pole pieces and the emitter
JPS5868846A (en) * 1981-10-07 1983-04-23 バリアン・アソシエイツ・インコ−ポレイテツド Linear beam microwave tube focused by permanent magnet
US4555646A (en) * 1981-10-07 1985-11-26 Varian Associates, Inc. Adjustable beam permanent-magnet-focused linear-beam microwave tube

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760161A (en) * 1951-10-10 1956-08-21 Bell Telephone Labor Inc Traveling wave frequency modulator
BE556363A (en) * 1954-09-16
US2936394A (en) * 1955-07-18 1960-05-10 Hughes Aircraft Co Electron gun
US2943234A (en) * 1956-02-24 1960-06-28 Varian Associates Charged particle flow control apparatus
DE1276217B (en) * 1958-06-25 1968-08-29 Siemens Ag Electron beam tubes with speed modulation, especially running field tubes
DE1090777B (en) * 1959-06-11 1960-10-13 Telefunken Gmbh Magnetic correction device for electron beam tubes, especially traveling wave tubes
NL282676A (en) * 1961-08-31

Also Published As

Publication number Publication date
FR1378524A (en) 1964-11-13
SE308761B (en) 1969-02-24
US3331984A (en) 1967-07-18
DE1439883A1 (en) 1969-08-28

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