GB1406938A - Periodic magnetically focused beam tube - Google Patents
Periodic magnetically focused beam tubeInfo
- Publication number
- GB1406938A GB1406938A GB3700473A GB3700473A GB1406938A GB 1406938 A GB1406938 A GB 1406938A GB 3700473 A GB3700473 A GB 3700473A GB 3700473 A GB3700473 A GB 3700473A GB 1406938 A GB1406938 A GB 1406938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- plate
- ceramic plates
- interaction
- magnetized
- 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
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
- H01J21/18—Tubes with a single discharge path having magnetic control means; having both magnetic and electrostatic control means
-
- 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
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
- H01J23/087—Magnetic focusing arrangements
- H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing
Landscapes
- Microwave Tubes (AREA)
Abstract
1406938 Velocity - modulated tubes; magnetization VARIAN ASSOCIATES 3 Aug 1973 [7 Aug 1972] 37004/73 Headings H1D and H1P The periodic permanent magnet focusing system of a microwave beam tube, e.g. a travelling-wave tube or klystron, is formed by a homogeneous permanently magnetizable plate 24 magnetized in a periodic pattern of alternating polarity along the beam path. The plate 24 may be of ferromagnetic material, or permanently magnetized material in a binder, e.g. barium ferrite embedded in silicone rubber, which may be flexible to permit winding into a cylindrical shape for use with pencil or hollow cylindrical electron beams. The plate is magnetized in the desired pattern by use of a soft iron comb structure having energizing coils wound around the base of the comb teeth, with the direction of current arranged in opposite senses in the coils of adjacent teeth. As shown, a travelling wave tube having an envelope formed by a pair of alumina or beryllia ceramic plates 12, 13 sealed together at their edges, has pair of magnetic systems 23, 24 disposed on the outer surfaces of the plates, and includes a cathode 17-e.g. a directly heated tungsten ribbon-and, printed on the inner surface of each plate, a slow-wave structure 18, focusing electrodes 21 and 22, and collector 19, connection to the components being effected via conducting pins passing through the ceramic plates. In further embodiments, a plurality of tubes (Fig. 8, not shown) having a common cathode (17) and a common envelope are formed by printing a plurality of slow-wave structures on the ceramic plates for interaction with a common sheet electron beam; and (Fig. 9, not shown) a coupled backward-wave oscillator 18<SP>1</SP> and forward wave amplifier 18 are printed on the same pair of ceramic plates for interaction with a common sheet electron beam. Reference is made to an extended interaction klystron structure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27840872A | 1972-08-07 | 1972-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1406938A true GB1406938A (en) | 1975-09-17 |
Family
ID=23064862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3700473A Expired GB1406938A (en) | 1972-08-07 | 1973-08-03 | Periodic magnetically focused beam tube |
Country Status (7)
Country | Link |
---|---|
US (1) | US3787747A (en) |
JP (1) | JPS49124962A (en) |
DE (1) | DE2338061A1 (en) |
FR (1) | FR2195838B1 (en) |
GB (1) | GB1406938A (en) |
IL (1) | IL42696A (en) |
IT (1) | IT992766B (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3909651A (en) * | 1974-08-15 | 1975-09-30 | Us Army | Low-cost periodic permanent magnet and electrostatic focusing scheme for electron tubes |
US3982152A (en) * | 1974-11-25 | 1976-09-21 | Raytheon Company | Cascade crossed field device |
US3971965A (en) * | 1975-03-31 | 1976-07-27 | The United States Of America As Represented By The Secretary Of The Army | Internally-focused traveling wave tube |
US4107573A (en) * | 1977-02-02 | 1978-08-15 | The United States Of America As Represented By The Secretary Of The Army | Printed circuit traveling wave tube |
US4232249A (en) * | 1978-09-28 | 1980-11-04 | Bell Telephone Laboratories, Incorporated | Beam-switched traveling wave tube |
US4392078A (en) * | 1980-12-10 | 1983-07-05 | General Electric Company | Electron discharge device with a spatially periodic focused beam |
US5227691A (en) * | 1989-05-24 | 1993-07-13 | Matsushita Electric Industrial Co., Ltd. | Flat tube display apparatus |
AU6086994A (en) * | 1993-01-11 | 1994-08-15 | Real Time Electronics Corporation | High frequency scan converter |
US6700454B2 (en) | 2001-06-29 | 2004-03-02 | Zvi Yaniv | Integrated RF array using carbon nanotube cathodes |
US7037370B2 (en) * | 2003-02-06 | 2006-05-02 | Mearini Gerald T | Free-standing diamond structures and methods |
FR2856189B1 (en) * | 2003-06-10 | 2007-02-16 | Hutchinson | METHOD FOR MANUFACTURING A MAGNETIC ENCODING DEVICE, AND THE DEVICE THUS OBTAINED |
WO2005017939A2 (en) * | 2003-06-30 | 2005-02-24 | Massachusetts Institute Of Technology | Ribbon-beam travelling wave amplifier with a single-sided slow-wave structure |
US7193485B2 (en) | 2003-08-12 | 2007-03-20 | James A. Dayton, Jr. | Method and apparatus for bi-planar backward wave oscillator |
WO2008008504A2 (en) * | 2006-07-13 | 2008-01-17 | Manhattan Technologies, Llc | Apparatus and method for producing electromagnetic oscillations |
WO2010065170A1 (en) * | 2008-08-20 | 2010-06-10 | Manhattan Technologies Ltd. | Multibeam doubly convergent electron gun |
US8723137B1 (en) * | 2012-10-17 | 2014-05-13 | Innosys, Inc | Hybrid magnet for vacuum electronic device |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2812470A (en) * | 1954-10-22 | 1957-11-05 | Bell Telephone Labor Inc | Periodic focusing in traveling wave tubes |
US2911555A (en) * | 1957-09-04 | 1959-11-03 | Hughes Aircraft Co | Traveling-wave tube |
US3102211A (en) * | 1959-08-19 | 1963-08-27 | Varian Associates | Adiabatic beam condenser method and apparatus |
US3231780A (en) * | 1960-10-14 | 1966-01-25 | Sfd Lab Inc | Meandering slow wave circuit having high impedance stub support means |
US3504222A (en) * | 1966-10-07 | 1970-03-31 | Hitachi Ltd | Slow-wave circuit including meander line and shielding therefor |
US3610999A (en) * | 1970-02-05 | 1971-10-05 | Varian Associates | Slow wave circuit and method of fabricating same |
US3670196A (en) * | 1971-02-24 | 1972-06-13 | Raytheon Co | Helix delay line for traveling wave devices |
US3705327A (en) * | 1971-06-02 | 1972-12-05 | Allan W Scott | Microwave generator with interleaved focusing and interaction structures |
-
1972
- 1972-08-07 US US00278408A patent/US3787747A/en not_active Expired - Lifetime
-
1973
- 1973-07-09 IL IL42696A patent/IL42696A/en unknown
- 1973-07-26 DE DE19732338061 patent/DE2338061A1/en active Pending
- 1973-07-31 IT IT27320/73A patent/IT992766B/en active
- 1973-08-03 GB GB3700473A patent/GB1406938A/en not_active Expired
- 1973-08-03 FR FR7328509A patent/FR2195838B1/fr not_active Expired
- 1973-08-07 JP JP48088748A patent/JPS49124962A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2338061A1 (en) | 1974-02-21 |
IL42696A0 (en) | 1973-10-25 |
US3787747A (en) | 1974-01-22 |
FR2195838A1 (en) | 1974-03-08 |
JPS49124962A (en) | 1974-11-29 |
IL42696A (en) | 1976-02-29 |
FR2195838B1 (en) | 1977-02-25 |
IT992766B (en) | 1975-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PCNP | Patent ceased through non-payment of renewal fee |