GB980119A - Periodic magnetic focusing arrangements for electron beam tubes - Google Patents
Periodic magnetic focusing arrangements for electron beam tubesInfo
- Publication number
- GB980119A GB980119A GB4826/62A GB482663A GB980119A GB 980119 A GB980119 A GB 980119A GB 4826/62 A GB4826/62 A GB 4826/62A GB 482663 A GB482663 A GB 482663A GB 980119 A GB980119 A GB 980119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polepiece
- electron beam
- feb
- polepieces
- magnetic focusing
- 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
- 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
980,119. Travelling wave tubes. TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT m.b.H. Feb. 6, 1963 [Feb. 23, 1962], No. 4826/63. Heading H1D. A periodic focusing arrangement, e.g. for travelling wave tubes, comprises a plurality of annular magnets 1, Fig. 1, arranged coaxially in relation to one another and separated by ferromagnetic polepieces 2 of alternate polarity, wherein the polepieces of like polarity are connected together by at least one ferromagnetic yoke 4. The annular magnets may be permanent magnets or electromagnets, and each polepiece has at least one web 3 for contacting the yoke. For feeding in high-frequency oscillations, Fig. 3, a resonant cavity 31 is sandwiched between a polepiece 37 and a radially magnetized element 32 provided with a polepiece 39 which thereby minimises distortions of the magnetic field due to the presence of the cavity resonator 31. For further influencing the focusing field, an adjustable magnetic shunt 33 is provided adjacent magnet 32.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET21644A DE1246891B (en) | 1962-02-23 | 1962-02-23 | Magnetic focusing arrangement for the bundled guidance of an electron beam, especially for traveling wave tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB980119A true GB980119A (en) | 1965-01-13 |
Family
ID=7550202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4826/62A Expired GB980119A (en) | 1962-02-23 | 1963-02-06 | Periodic magnetic focusing arrangements for electron beam tubes |
Country Status (3)
Country | Link |
---|---|
US (1) | US3188533A (en) |
DE (1) | DE1246891B (en) |
GB (1) | GB980119A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3334264A (en) * | 1963-07-01 | 1967-08-01 | Gen Electric | Beam focusing magnet system |
DE3014404C2 (en) * | 1979-04-11 | 1985-04-18 | Nippon Electric Co., Ltd., Tokio/Tokyo | Lauffeldtube |
DE3015231A1 (en) * | 1980-04-21 | 1981-10-22 | Siemens AG, 1000 Berlin und 8000 München | HIKING FIELD TUBES WITH PERIODIC-PERMANENT-MAGNETIC FOCUSING SYSTEM |
US5332947A (en) * | 1992-05-13 | 1994-07-26 | Litton Systems, Inc. | Integral polepiece RF amplification tube for millimeter wave frequencies |
US5332948A (en) * | 1992-05-13 | 1994-07-26 | Litton Systems, Inc. | X-z geometry periodic permanent magnet focusing system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844754A (en) * | 1953-04-29 | 1958-07-22 | Bell Telephone Labor Inc | Electron beam focusing system |
NL99653C (en) * | 1956-03-01 | |||
FR1212354A (en) * | 1957-10-10 | 1960-03-23 | Thomson Houston Comp Francaise | High frequency energy exchange device |
US2991382A (en) * | 1958-03-20 | 1961-07-04 | Nippon Electric Co | Electron beam tube focusing device |
-
1962
- 1962-02-23 DE DET21644A patent/DE1246891B/en active Pending
-
1963
- 1963-02-06 GB GB4826/62A patent/GB980119A/en not_active Expired
- 1963-02-18 US US259206A patent/US3188533A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE1246891B (en) | 1967-08-10 |
US3188533A (en) | 1965-06-08 |
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