GB865725A - Improvements in or relating to magnetic focusing systems for travelling-wave tubes - Google Patents
Improvements in or relating to magnetic focusing systems for travelling-wave tubesInfo
- Publication number
- GB865725A GB865725A GB22033/58A GB2203358A GB865725A GB 865725 A GB865725 A GB 865725A GB 22033/58 A GB22033/58 A GB 22033/58A GB 2203358 A GB2203358 A GB 2203358A GB 865725 A GB865725 A GB 865725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rods
- main
- soft iron
- travelling wave
- field
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microwave Tubes (AREA)
- Particle Accelerators (AREA)
Abstract
865,725. Travelling wave tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 9, 1958 [July 11, 1957], No. 22033/58. Class 39(1). A travelling wave tube has a 'uniform field' magnetic focusing system comprising two apertured polygonal soft iron pole pieces 3, Fig. 4, to each of which is attached a main set of radially arranged permanent magnet rods 1 the rods of one main set being radially magnetised in the opposite radial direction to the rods of the other main set the outer ends of the rods being connected by soft iron rod members 4 and an additional set 5 (2 sets shown) of radially arranged and radially magnetised permanent magnet steel rods adjacent one of the two main sets the outer ends of the rods of the additional set being disposed against the soft iron members 4 and the inner ends being free the field strength and direction of magnetisation of the rods of the additional set being such as to inhibit along at least part of the system variations in the strength of the axial magnetic field. To make the field larger at the output end of the travelling wave tube the main magnets at that end are made slightly longer and thicker than those at the input end, Fig. 5 (not shown). A pile of hard paper and mumetal rings 6, 7 may form a composite tube serving approximately the function of a flux guide. The input and output waveguides extend between the composite tube and the pole pieces.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL218874 | 1957-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB865725A true GB865725A (en) | 1961-04-19 |
Family
ID=19750926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22033/58A Expired GB865725A (en) | 1957-07-11 | 1958-07-09 | Improvements in or relating to magnetic focusing systems for travelling-wave tubes |
Country Status (6)
Country | Link |
---|---|
US (1) | US2956193A (en) |
CH (1) | CH362758A (en) |
DE (1) | DE1112790B (en) |
FR (1) | FR1211420A (en) |
GB (1) | GB865725A (en) |
NL (2) | NL218874A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3183398A (en) * | 1960-08-04 | 1965-05-11 | Raytheon Co | Beam focusing magnet |
US3164742A (en) * | 1960-12-27 | 1965-01-05 | Gen Electric | High frequency energy interchange device |
NL277862A (en) * | 1961-05-02 | |||
US3283200A (en) * | 1963-12-12 | 1966-11-01 | Varian Associates | High frequency electron discharge device having improved permanent magnetic focusing |
DE1491426A1 (en) * | 1964-08-12 | 1969-05-22 | Siemens Ag | Permanent magnet system for the bundled guidance of an electrode beam over a longer distance, especially for traveling field tubes |
DE1491444B2 (en) * | 1965-01-26 | 1972-04-06 | Siemens AG, 1000 Berlin u 8000 München | PERMANENT MAGNET SYSTEM FOR GENERATING A SIGNIFICANTLY HOMOGENOUS MAGNETIC FIELD FOR CONCENTRATED GUIDANCE OF AN ELECTRON BEAM OVER A LONGER DISTANCE, IN PARTICULAR FOR WALKING FIELD TUBES |
US3349354A (en) * | 1965-06-02 | 1967-10-24 | Miyata Saburo | Means for imposing electric and magnetic fields on flowing fluids |
US3896329A (en) * | 1972-09-21 | 1975-07-22 | Varian Associates | Permanent magnet beam focus structure for linear beam tubes |
US5744910A (en) * | 1993-04-02 | 1998-04-28 | Litton Systems, Inc. | Periodic permanent magnet focusing system for electron beam |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2825840A (en) * | 1953-01-29 | 1958-03-04 | Itt | Traveling wave electron discharge devices |
GB748946A (en) * | 1953-03-26 | 1956-05-16 | Standard Telephones Cables Ltd | Improvements in or relating to travelling wave apparatus |
US2844754A (en) * | 1953-04-29 | 1958-07-22 | Bell Telephone Labor Inc | Electron beam focusing system |
DE1098625B (en) * | 1953-11-13 | 1961-02-02 | Siemens Ag | Magnetic bundling system for bundled guidance of one (several) electron flow (s) by means of a homogeneous magnetic field along a larger distance, especially for traveling wave tubes |
NL200488A (en) * | 1954-09-22 | |||
NL99653C (en) * | 1956-03-01 |
-
0
- NL NL107303D patent/NL107303C/xx active
- NL NL218874D patent/NL218874A/xx unknown
-
1958
- 1958-06-13 US US741871A patent/US2956193A/en not_active Expired - Lifetime
- 1958-07-08 CH CH6151858A patent/CH362758A/en unknown
- 1958-07-09 DE DEN15319A patent/DE1112790B/en active Pending
- 1958-07-09 FR FR1211420D patent/FR1211420A/en not_active Expired
- 1958-07-09 GB GB22033/58A patent/GB865725A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2956193A (en) | 1960-10-11 |
NL218874A (en) | |
CH362758A (en) | 1962-06-30 |
NL107303C (en) | |
DE1112790B (en) | 1961-08-17 |
FR1211420A (en) | 1960-03-16 |
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