GB578271A - Improvements in electron discharge devices employing secondary emission - Google Patents
Improvements in electron discharge devices employing secondary emissionInfo
- Publication number
- GB578271A GB578271A GB582042A GB582042A GB578271A GB 578271 A GB578271 A GB 578271A GB 582042 A GB582042 A GB 582042A GB 582042 A GB582042 A GB 582042A GB 578271 A GB578271 A GB 578271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- resonator
- velocity
- emitter
- cathode
- 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
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—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
- H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
Abstract
578,271. Velocity modulated electron multipliers. STANDARD TELEPHONES & CABLES, Ltd. (Western Electric Co., Inc.). April 30, 1942, No. 5820. [Classes 39 (i) and 40 (v)] In a velocity modulated electron discharge tube, the velocity modulated beam impinges on the initial or only electrode of an electron multiplier. A small beam from a cathode 2, Fig. 2, is accelerated by the flanges 6, 7 of a resonator to impinge on a secondary emitter 4 maintained at a potential slightly positive to the cathode to reduce the velocity of impact; the beam is velocity modulated as it passes the flanges 6, 7 from the cathode to the electrode 4 and the emitted secondaries move past the gap to give an amplified output. The flanges 6, 7 may be the control electrodes of a resonator with a loop output or form part of a concentric conductor 14, 15 which is at the end of a wave guide of the kind described in Specification 468,548, the closure 16 being telescopic. The electrode 4 is nearer the flange 7 than the distance between the cathode and flange 6. The slow electrons may not impact the electrode 4. In a further form, using two resonators 24, 32, Fig. 5, a diaphragm 29 at cathode potential is interposed between them and allows only those electrons whose velocity has been raised at the gap 28 to flow to the secondary emitter 34 ; the two chambers 24, 32 are at the same potential and the emitter is slightly positive. Both the primary electron beam and the secondary stream yield energy to the output resonator 32. In an oscillation generator, the secondary emitter 43, Fig. 6, is placed between the two resonators 41, 45, which have a common wall 47 with a back coupling loop 48. A collector 46 withdraws the electrons which have passed through the second resonator 45. In other forms where the secondary emitter or multiplier is between two resonator chambers, this emitter may be (i) a thin plate, Fig. 7 (not shown), which when struck on one side by the primary beam emits secondary electrons on the other ; (ii) a per forated plate, Figs. 8-10 (not shown), with secondary emissive material carried in the perforations; (iii) a multi-stage multiplier, Fig. 11 (not shown) ; (iv) a single or multi-stage multiplier, Figs. 12 and 13 (not shown), with the secondary electrodes parallel to the axis of the tubes and working with crossed electrostatic and electro-magnetic fields. In a further form, electrons after velocity modulations at the gap 96, Fig. 14, pass through a drift space 101 and retarding electrode 113 so that the density modulated stream impinges on the first electrode 102 of the multiplier at a suitable speed. A cross-electromagnetic field is set up by a coil or permanent magnet 117 to direct the secondary streams on the electrodes 103, 104, 105, whence the amplified stream is directed by the accelerating and focusing electrodes 120, 121 to the gap in the output resonator 109. The primary beam may be circular or in the form of a line or pencil, the resonators and electrodes being suitably shaped according to the beam form. The focusing system may be designed by the method set out in Specification 545,835.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB582042A GB578271A (en) | 1942-04-30 | 1942-04-30 | Improvements in electron discharge devices employing secondary emission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB582042A GB578271A (en) | 1942-04-30 | 1942-04-30 | Improvements in electron discharge devices employing secondary emission |
Publications (1)
Publication Number | Publication Date |
---|---|
GB578271A true GB578271A (en) | 1946-06-21 |
Family
ID=9803207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB582042A Expired GB578271A (en) | 1942-04-30 | 1942-04-30 | Improvements in electron discharge devices employing secondary emission |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB578271A (en) |
-
1942
- 1942-04-30 GB GB582042A patent/GB578271A/en not_active Expired
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