EP0957505A3 - Electron gun assembly - Google Patents

Electron gun assembly Download PDF

Info

Publication number
EP0957505A3
EP0957505A3 EP99303558A EP99303558A EP0957505A3 EP 0957505 A3 EP0957505 A3 EP 0957505A3 EP 99303558 A EP99303558 A EP 99303558A EP 99303558 A EP99303558 A EP 99303558A EP 0957505 A3 EP0957505 A3 EP 0957505A3
Authority
EP
European Patent Office
Prior art keywords
electron gun
gun assembly
focus electrode
cathode
integral
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.)
Withdrawn
Application number
EP99303558A
Other languages
German (de)
French (fr)
Other versions
EP0957505A2 (en
Inventor
Steven Bardell
Alfred Christopher Thwaites
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.)
Teledyne UK Ltd
Original Assignee
EEV Ltd
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 EEV Ltd filed Critical EEV Ltd
Publication of EP0957505A2 publication Critical patent/EP0957505A2/en
Publication of EP0957505A3 publication Critical patent/EP0957505A3/en
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2225/00—Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
    • H01J2225/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J2225/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

An electron gun assembly includes a cathode 1, control grid 5 located in front of it and a focus electrode 6. The control electrode 5 is integral with a cylindrical support 11 and formed of pyrolytic graphite. Similarly, the focus electrode 6 is integral with a cylindrical support 16 and is formed of molybdenum. The control grid 5 and focus electrode 6 are mounted on a common mount 15 located behind the front face of the cathode 1, giving a simple structure having low thermally capacity and being mechanically robust.
EP99303558A 1998-05-09 1999-05-06 Electron gun assembly Withdrawn EP0957505A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9809819.7A GB9809819D0 (en) 1998-05-09 1998-05-09 Electron gun assembly
GB9809819 1998-05-09

Publications (2)

Publication Number Publication Date
EP0957505A2 EP0957505A2 (en) 1999-11-17
EP0957505A3 true EP0957505A3 (en) 2002-07-31

Family

ID=10831652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99303558A Withdrawn EP0957505A3 (en) 1998-05-09 1999-05-06 Electron gun assembly

Country Status (3)

Country Link
EP (1) EP0957505A3 (en)
CA (1) CA2271253A1 (en)
GB (2) GB9809819D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6664720B2 (en) * 2001-04-23 2003-12-16 L-3 Communications Corporation Temperature compensated gun
GB2386246B (en) * 2001-11-01 2005-06-29 Marconi Applied Techn Ltd Electron beam tube apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1220630A (en) * 1967-08-23 1971-01-27 Raytheon Co Improvements in electron guns
GB1353547A (en) * 1970-06-29 1974-05-22 Varian Associates Electron tube
US3967150A (en) * 1975-01-31 1976-06-29 Varian Associates Grid controlled electron source and method of making same
US4748369A (en) * 1986-04-10 1988-05-31 Star Microwave Electron gun assembly useful with traveling wave tubes
GB2287579A (en) * 1994-03-16 1995-09-20 Eev Ltd Electron gun arrangements
EP0945891A1 (en) * 1998-03-24 1999-09-29 Eev Limited Electron beam tubes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975315A (en) * 1957-03-13 1961-03-14 Rauland Corp Cathode-ray tube
US3983446A (en) * 1971-07-06 1976-09-28 Varian Associates Gridded convergent flow electron gun for linear beam tubes
GB2271020A (en) * 1992-09-24 1994-03-30 Eev Ltd Electron gun arrangements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1220630A (en) * 1967-08-23 1971-01-27 Raytheon Co Improvements in electron guns
GB1353547A (en) * 1970-06-29 1974-05-22 Varian Associates Electron tube
US3967150A (en) * 1975-01-31 1976-06-29 Varian Associates Grid controlled electron source and method of making same
US4748369A (en) * 1986-04-10 1988-05-31 Star Microwave Electron gun assembly useful with traveling wave tubes
GB2287579A (en) * 1994-03-16 1995-09-20 Eev Ltd Electron gun arrangements
EP0945891A1 (en) * 1998-03-24 1999-09-29 Eev Limited Electron beam tubes

Also Published As

Publication number Publication date
EP0957505A2 (en) 1999-11-17
GB2337152A (en) 1999-11-10
CA2271253A1 (en) 1999-11-09
GB9809819D0 (en) 1998-07-08
GB9910501D0 (en) 1999-07-07

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