GB906043A - Improvements in or relating to means for producing electron beams - Google Patents
Improvements in or relating to means for producing electron beamsInfo
- 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
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.
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)
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 |
-
1957
- 1957-11-27 GB GB3692457A patent/GB906043A/en not_active Expired
Cited By (5)
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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