GB906043A - Improvements in or relating to means for producing electron beams - Google Patents

Improvements in or relating to means for producing electron beams

Info

Publication number
GB906043A
GB906043A GB3692457A GB3692457A GB906043A GB 906043 A GB906043 A GB 906043A GB 3692457 A GB3692457 A GB 3692457A GB 3692457 A GB3692457 A GB 3692457A GB 906043 A GB906043 A GB 906043A
Authority
GB
United Kingdom
Prior art keywords
cathode
additional electrode
aperture
anode
continuation
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
GB3692457A
Inventor
Karl Heinz Robert Chr Kreuchen
Sydney Joseph Hewitt
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB3692457A priority Critical patent/GB906043A/en
Publication of GB906043A publication Critical patent/GB906043A/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
    • H01J3/029—Schematic arrangements for beam forming

Landscapes

  • Microwave Tubes (AREA)

Abstract

906,043. Velocity modulated tubes. ELECTRIC & MUSICAL INDUSTRIES Ltd. Nov. 27, 1958 [Nov. 27, 1957], No. 36924/57. Class 39 (1). An electron gun, particularly for use in klystrons or travelling wave tubes, has a dished cathode, a shield electrode, an anode and an additional electrode disposed in a central aperture in the cathode and having a part lying in, or in front of, a smooth continuation of the cathode surface across the aperture, but not extending forwardly of the cathode. As shown, the cathode 14, Fig. 10, is an annular ring which has a part-spherical shape, and faces an apertured anode 13; in between is a shield electrode 15. The additional electrode 16 lies in the continuation surface of the annular ring 14, but may be convex or may lie in front of the continuation surface as in Fig. 12. In Fig. 12 the annular cathode 14 departs from a spherical form; it may be of elliptical form. A further control on the emitted electron beam to reduce effects arising out of spherical aberration in the electron lens formed by the anode aperture. More than one additional electrode may be provided, e.g. in the form of concentric rings. The additional electrode or electrodes may be electron emissive. According to the Provisional Specification, the additional electrode may be behind the cathode aperture or a multi-apertured cathode surface.
GB3692457A 1957-11-27 1957-11-27 Improvements in or relating to means for producing electron beams Expired GB906043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3692457A GB906043A (en) 1957-11-27 1957-11-27 Improvements in or relating to means for producing electron beams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3692457A GB906043A (en) 1957-11-27 1957-11-27 Improvements in or relating to means for producing electron beams

Publications (1)

Publication Number Publication Date
GB906043A true GB906043A (en) 1962-09-19

Family

ID=10392285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3692457A Expired GB906043A (en) 1957-11-27 1957-11-27 Improvements in or relating to means for producing electron beams

Country Status (1)

Country Link
GB (1) GB906043A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266888B (en) * 1964-02-21 1968-04-25 Heurtey Sa Device for generating a high-power electron beam
GB2267175A (en) * 1992-05-11 1993-11-24 Litton Systems Inc Electron guns
EP3719830A1 (en) * 2019-04-05 2020-10-07 L3 Electron Devices Inc. Sheet beam electron gun using axially-symmetric spherical cathode

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266888B (en) * 1964-02-21 1968-04-25 Heurtey Sa Device for generating a high-power electron beam
GB2267175A (en) * 1992-05-11 1993-11-24 Litton Systems Inc Electron guns
US5332945A (en) * 1992-05-11 1994-07-26 Litton Systems, Inc. Pierce gun with grading electrode
GB2267175B (en) * 1992-05-11 1995-10-25 Litton Systems Inc Electron guns
EP3719830A1 (en) * 2019-04-05 2020-10-07 L3 Electron Devices Inc. Sheet beam electron gun using axially-symmetric spherical cathode

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