GB872170A - Improvements relating to electron-beam discharge tubes - Google Patents

Improvements relating to electron-beam discharge tubes

Info

Publication number
GB872170A
GB872170A GB3444556A GB3444556A GB872170A GB 872170 A GB872170 A GB 872170A GB 3444556 A GB3444556 A GB 3444556A GB 3444556 A GB3444556 A GB 3444556A GB 872170 A GB872170 A GB 872170A
Authority
GB
United Kingdom
Prior art keywords
cathode
electrode
distance
aperture
anode
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
GB3444556A
Inventor
John Robert Pickin
Ronald Dawson Phillips
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB3444556A priority Critical patent/GB872170A/en
Publication of GB872170A publication Critical patent/GB872170A/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
    • 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

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

872,170. Velocity-modulated tubes. FERRANTI Ltd. Feb. 7, 1958 [Nov. 10, 1956], No. 34445/56. Class 39(1). An electron gun, particularly for high power klystrons, comprises a cathode having a plane or dished emissive surface provided with an aperture through which a modulating electrode protrudes. In one embodiment a cathode 5 is carried on a molybdenum disc 3 which is brazed to one end of an insulating cylinder 1. Heater 2 surrounds cylinder 1 and heat is conducted to the cathode through the insulating cylinder 1 and skirted portion 4. A rod-shaped modulating electrode 13 is secured at one end by metal cap 16 and protrudes through aperture 12 in cathode 5 at the other. The gun is completed by focusing electrode 10 supported by cylindrical insulator 11, and by an apertured anode 8. Electrode 13 may be rounded at the protruding end or may be a hollow cylinder in which case the cathode aperture is annular, or alternatively two modulating electrodes may be provided one being tubular and surrounding the second which is rod-shaped, the electrodes being insulated from each other and from the cathode, though they need not extend beyond the cathode by the same distance. In each case, however, they extend a distance which is short compared with the anode-cathode distance, e.g. about 2% of this distance. The modulation is applied to both the focusing electrode 10 and the electrode 13 in a negative sense with respect to the cathode, cut-off being obtained with a modulation potential of about 1 / 10th of the anode potential. Cap 16 and member 4 may provide contacts for electrode 13 and the cathode respectively.
GB3444556A 1956-11-10 1956-11-10 Improvements relating to electron-beam discharge tubes Expired GB872170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3444556A GB872170A (en) 1956-11-10 1956-11-10 Improvements relating to electron-beam discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3444556A GB872170A (en) 1956-11-10 1956-11-10 Improvements relating to electron-beam discharge tubes

Publications (1)

Publication Number Publication Date
GB872170A true GB872170A (en) 1961-07-05

Family

ID=10365756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3444556A Expired GB872170A (en) 1956-11-10 1956-11-10 Improvements relating to electron-beam discharge tubes

Country Status (1)

Country Link
GB (1) GB872170A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000309A1 (en) * 1977-06-27 1979-01-10 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Hollow-beam generator producing monokinetic electrons along helicoidal paths
EP0178359A1 (en) * 1983-07-30 1986-04-23 English Electric Valve Company Limited Linear beam tubes
US4599542A (en) * 1983-07-30 1986-07-08 English Electric Valve Company Limited Linear beam tubes
US5629582A (en) * 1994-03-16 1997-05-13 Eev Limited Thermally stable electron gun arrangement with electrically non-conductive spacer members

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000309A1 (en) * 1977-06-27 1979-01-10 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Hollow-beam generator producing monokinetic electrons along helicoidal paths
EP0178359A1 (en) * 1983-07-30 1986-04-23 English Electric Valve Company Limited Linear beam tubes
US4599542A (en) * 1983-07-30 1986-07-08 English Electric Valve Company Limited Linear beam tubes
US5629582A (en) * 1994-03-16 1997-05-13 Eev Limited Thermally stable electron gun arrangement with electrically non-conductive spacer members

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