GB987024A - A magnetic focussing device for an electron tube - Google Patents

A magnetic focussing device for an electron tube

Info

Publication number
GB987024A
GB987024A GB1215/62A GB121562A GB987024A GB 987024 A GB987024 A GB 987024A GB 1215/62 A GB1215/62 A GB 1215/62A GB 121562 A GB121562 A GB 121562A GB 987024 A GB987024 A GB 987024A
Authority
GB
United Kingdom
Prior art keywords
electron tube
travelling
jan
focussing device
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
GB1215/62A
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of GB987024A publication Critical patent/GB987024A/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
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing

Abstract

987,024. Travelling-wave tubes. NIPPON ELECTRIC CO. Ltd. Jan. 12, 1962 [Jan. 19, 1961], No. 1215/62. Heading H1D. In a periodic magnetic focusing system of a travelling-wave tube having its gun region immersed in a magnetic field, the axial, annular extensions 70 of the annular polepieces 69 of the periodic structure 14 are all of the same diameter, but the axial lengths of the magnets 62, 63...; or the inner or, as shown, the outer diameters; or the materials, are varied in such manner as to compensate for the leakage field of the magnetic field of the gun region.
GB1215/62A 1961-01-19 1962-01-12 A magnetic focussing device for an electron tube Expired GB987024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP185461 1961-01-19

Publications (1)

Publication Number Publication Date
GB987024A true GB987024A (en) 1965-03-24

Family

ID=11513114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1215/62A Expired GB987024A (en) 1961-01-19 1962-01-12 A magnetic focussing device for an electron tube

Country Status (2)

Country Link
US (1) US3259788A (en)
GB (1) GB987024A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353056A (en) * 1964-04-24 1967-11-14 Gen Electric Electron beam focusing system including a magnetically permeable shield enclosing theelectron gun permanent magnet
US3355622A (en) * 1964-08-05 1967-11-28 Bell Telephone Labor Inc Electron beam focusing apparatus
US3398314A (en) * 1964-11-18 1968-08-20 Westinghouse Electric Corp Traveling wave tube having means for removing slow electrons from electron beam
GB1538430A (en) * 1975-04-03 1979-01-17 English Electric Valve Co Ltd Travelling wave tubes
CN111834185B (en) * 2020-07-22 2022-11-25 中国电子科技集团公司第十二研究所 Klystron

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945153A (en) * 1956-08-31 1960-07-12 Rca Corp Electron beam tube
NL237015A (en) * 1958-03-12
US3178602A (en) * 1960-12-30 1965-04-13 Gen Precision Inc Adjustable permanent magnet focusing array

Also Published As

Publication number Publication date
US3259788A (en) 1966-07-05

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