GB1357469A - Electron-beam generators for transit-time electron discharge tubes - Google Patents

Electron-beam generators for transit-time electron discharge tubes

Info

Publication number
GB1357469A
GB1357469A GB5659072A GB5659072A GB1357469A GB 1357469 A GB1357469 A GB 1357469A GB 5659072 A GB5659072 A GB 5659072A GB 5659072 A GB5659072 A GB 5659072A GB 1357469 A GB1357469 A GB 1357469A
Authority
GB
United Kingdom
Prior art keywords
grid
cathode
control grid
annular
portions
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
GB5659072A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1357469A publication Critical patent/GB1357469A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam

Abstract

1357469 Velocity-modulated tubes SIEMENS AG 7 Dec 1972 [2 March 1972] 56590/72 Heading H1D An electron gun for a transit-time tube, operable at two different power levels, includes a control grid which is spaced from the cathode and includes a portion which surrounds a central portion of the emissive area of the cathode and is such that the emission from the cathode area surrounding the central portion can be controlled independently of the emission from the central portion. As shown, the outer portion of the cathode emissive surface is covered by the annular grid 18, and the inner portion 19 projects forward flush with the grid surface, an annular shadow grid 20, with apertures aligned with those of the control grid, between interposed between the control grid and the cathode. The focusing anode 30 draws a current I 1 or I 2 according to whether the control grid is negative or positive, respectively. In further embodiments (Figs. 1 to 3, and 6 to 9, not shown), which avoid the stepping forward of the central cathode portion 19, the latter is covered by an inner portion of control grid electrically insulated from the annular portion; in this case, a common shadow grid for the two grid portions may be employed (Figs. 6 to 9), and the grid portions are supported by separate metal plates 8 extending through the envelope wall and separated by ceramic envelope portions 9. The cathode includes radiation shields 6.
GB5659072A 1972-03-02 1972-12-07 Electron-beam generators for transit-time electron discharge tubes Expired GB1357469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2210160A DE2210160C3 (en) 1972-03-02 1972-03-02 Electron gun system for time-of-flight tubes

Publications (1)

Publication Number Publication Date
GB1357469A true GB1357469A (en) 1974-06-19

Family

ID=5837734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5659072A Expired GB1357469A (en) 1972-03-02 1972-12-07 Electron-beam generators for transit-time electron discharge tubes

Country Status (6)

Country Link
US (1) US3859552A (en)
DE (1) DE2210160C3 (en)
FR (1) FR2173919B1 (en)
GB (1) GB1357469A (en)
IT (1) IT972629B (en)
SE (1) SE386005B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117967A (en) * 1982-03-29 1983-10-19 Litton Systems Inc Dual-mode electron gun
GB2333892A (en) * 1998-02-02 1999-08-04 Litton Systems Inc Grid support structure for an electron beam device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL43254A (en) * 1972-09-28 1976-02-29 Varian Ass Ciates Gridded electron gun employing a concave cathode emitter
DE2535724A1 (en) * 1975-08-09 1977-02-17 Licentia Gmbh Cathode ray tube with axis symmetrical cathode - has shadow grid close to cathode which has circular ridges on its surface
US4023061A (en) * 1976-01-19 1977-05-10 Varian Associates Dual mode gridded gun
US4321505A (en) * 1978-07-24 1982-03-23 Varian Associates, Inc. Zero-bias gridded gun
US4553064A (en) * 1983-08-30 1985-11-12 Hughes Aircraft Company Dual-mode electron gun with improved shadow grid arrangement
US4748369A (en) * 1986-04-10 1988-05-31 Star Microwave Electron gun assembly useful with traveling wave tubes
US4745324A (en) * 1986-05-12 1988-05-17 Litton Systems, Inc. High power switch tube with Faraday cage cavity anode
CN104078296B (en) * 2014-07-02 2016-09-14 南京三乐电子信息产业集团有限公司 A kind of grided electron gun of high assembly precision

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694159A (en) * 1949-03-22 1954-11-09 Bell Telephone Labor Inc Microwave amplifier
NL241133A (en) * 1959-07-09
US3132275A (en) * 1960-05-31 1964-05-05 Eitel Mccullough Inc Electron gun and cathode heater assembly therefor
US3377492A (en) * 1965-08-03 1968-04-09 Hughes Aircraft Co Flood gun for storage tubes having a dome-shaped cathode and dome-shaped grid electrodes
US3484645A (en) * 1967-03-06 1969-12-16 Us Army Non-intercepting grid structure for an electron tube
US3500110A (en) * 1967-08-23 1970-03-10 Raytheon Co Noncurrent intercepting electron beam control element
FR1582070A (en) * 1968-04-26 1969-09-26
US3558967A (en) * 1969-06-16 1971-01-26 Varian Associates Linear beam tube with plural cathode beamlets providing a convergent electron stream

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117967A (en) * 1982-03-29 1983-10-19 Litton Systems Inc Dual-mode electron gun
GB2333892A (en) * 1998-02-02 1999-08-04 Litton Systems Inc Grid support structure for an electron beam device
US5990622A (en) * 1998-02-02 1999-11-23 Litton Systems, Inc. Grid support structure for an electron beam device
GB2333892B (en) * 1998-02-02 2002-12-18 Litton Systems Inc Grid support structure for an electron beam device

Also Published As

Publication number Publication date
US3859552A (en) 1975-01-07
DE2210160C3 (en) 1975-04-30
SE386005B (en) 1976-07-26
DE2210160A1 (en) 1973-09-13
IT972629B (en) 1974-05-31
DE2210160B2 (en) 1974-09-12
FR2173919A1 (en) 1973-10-12
FR2173919B1 (en) 1978-06-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19921206