GB1049920A - High frequency electron discharge device having improved permanent magnetic focusing - Google Patents

High frequency electron discharge device having improved permanent magnetic focusing

Info

Publication number
GB1049920A
GB1049920A GB48164/64A GB4816464A GB1049920A GB 1049920 A GB1049920 A GB 1049920A GB 48164/64 A GB48164/64 A GB 48164/64A GB 4816464 A GB4816464 A GB 4816464A GB 1049920 A GB1049920 A GB 1049920A
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
tube
high frequency
discharge device
permanent magnetic
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
Application number
GB48164/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1049920A publication Critical patent/GB1049920A/en
Expired legal-status Critical Current

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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00

Abstract

1,049,920. Velocity-modulated tubes. VARIAN ASSOCIATES. Nov. 26, 1964 [Dec. 12, 1963], No. 48164/64. Heading H1D. A permanent magnet focusing structure for a travelling wave BWO or amplifier tube or for a klystron comprises a permanent magnet, or as shown an assembly of permanent magnet rings 17, 18 at opposite ends of the tube 7, and an intermediate, auxiliary, oppositely polarized permanent magnet, or assembly of magnets 19, 20, 21 for reinforcing and concentrating the axial uniform field and for reducing leakage field. The centre magnet 21 is divided into two in order to leave space for the output feeder 15. The structure is completed by polepieces 9, 10, which may be shifted by means of screws 25 to adjust the position of the tube 7, and by an exterior flux guide and shield 16, aluminium spacers 23, 24 and magnetic shims 28, 29 integral with the polepieces 9, 10.
GB48164/64A 1963-12-12 1964-11-26 High frequency electron discharge device having improved permanent magnetic focusing Expired GB1049920A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US330029A US3283200A (en) 1963-12-12 1963-12-12 High frequency electron discharge device having improved permanent magnetic focusing
US33072863A 1963-12-16 1963-12-16

Publications (1)

Publication Number Publication Date
GB1049920A true GB1049920A (en) 1966-11-30

Family

ID=26987093

Family Applications (2)

Application Number Title Priority Date Filing Date
GB47610/64A Expired GB1041518A (en) 1963-12-12 1964-11-23 High frequency electron discharge device
GB48164/64A Expired GB1049920A (en) 1963-12-12 1964-11-26 High frequency electron discharge device having improved permanent magnetic focusing

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB47610/64A Expired GB1041518A (en) 1963-12-12 1964-11-23 High frequency electron discharge device

Country Status (3)

Country Link
US (1) US3283200A (en)
DE (1) DE1491519B1 (en)
GB (2) GB1041518A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403627A1 (en) * 1973-01-26 1974-08-01 Thomson Csf CONCENTRATING DEVICE FOR AN ELECTRON TUBE

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614505A (en) * 1969-07-10 1971-10-19 Tokyo Shibaura Electric Co Packaged magnetron
US4218712A (en) * 1977-03-17 1980-08-19 Bethlehem Steel Corporation Magnetically shielded image dissector tube camera
US5382936A (en) * 1992-06-02 1995-01-17 The United States Of America As Represented By The Secretary Of The Army Field augmented permanent magnet structures
US6573817B2 (en) * 2001-03-30 2003-06-03 Sti Optronics, Inc. Variable-strength multipole beamline magnet
US20240096583A1 (en) * 2022-09-15 2024-03-21 Elve Inc. Cathode heater assembly and method of manufacture

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103609A (en) * 1963-09-10 zitelli
US2797353A (en) * 1951-06-15 1957-06-25 Bell Telephone Labor Inc Traveling wave type electron discharge devices
NL173106B (en) * 1951-12-29 Standard Oil Co Ohio CONNECTION OR CONNECTOR FOR AN ELECTROLYTIC CAPACITOR.
US2867744A (en) * 1953-09-30 1959-01-06 Bell Telephone Labor Inc Traveling wave tube
US3051866A (en) * 1954-04-09 1962-08-28 Varian Associates Velocity modulation electron tube apparatus
US2936394A (en) * 1955-07-18 1960-05-10 Hughes Aircraft Co Electron gun
US2934666A (en) * 1956-12-31 1960-04-26 Terry M Shrader Electron gun
NL107303C (en) * 1957-07-11
US2991391A (en) * 1957-07-24 1961-07-04 Varian Associates Electron beam discharge apparatus
GB836770A (en) * 1959-01-02 1960-06-09 Mullard Ltd Magnetic focusing assembly
US3134925A (en) * 1960-09-12 1964-05-26 Westinghouse Electric Corp Magnetic structure for providing smooth uniform magnetic field distribution in traveling wave tubes
NL274681A (en) * 1961-02-22
DE1136020B (en) * 1961-02-22 1962-09-06 Telefunken Patent Ferromagnetic shielding device for a permanent magnetic focusing arrangement for the bundled guidance of the electron beam of a field tube
NL287237A (en) * 1961-12-27

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403627A1 (en) * 1973-01-26 1974-08-01 Thomson Csf CONCENTRATING DEVICE FOR AN ELECTRON TUBE

Also Published As

Publication number Publication date
GB1041518A (en) 1966-09-07
DE1491519B1 (en) 1970-03-05
US3283200A (en) 1966-11-01

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