FR2218643A1 - - Google Patents

Info

Publication number
FR2218643A1
FR2218643A1 FR7405346A FR7405346A FR2218643A1 FR 2218643 A1 FR2218643 A1 FR 2218643A1 FR 7405346 A FR7405346 A FR 7405346A FR 7405346 A FR7405346 A FR 7405346A FR 2218643 A1 FR2218643 A1 FR 2218643A1
Authority
FR
France
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.)
Granted
Application number
FR7405346A
Other languages
French (fr)
Other versions
FR2218643B1 (en
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Publication of FR2218643A1 publication Critical patent/FR2218643A1/fr
Application granted granted Critical
Publication of FR2218643B1 publication Critical patent/FR2218643B1/fr
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
FR7405346A 1973-02-16 1974-02-18 Expired FR2218643B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB768273A GB1451956A (en) 1973-02-16 1973-02-16 Travelling wave tubes

Publications (2)

Publication Number Publication Date
FR2218643A1 true FR2218643A1 (en) 1974-09-13
FR2218643B1 FR2218643B1 (en) 1978-10-27

Family

ID=9837782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7405346A Expired FR2218643B1 (en) 1973-02-16 1974-02-18

Country Status (6)

Country Link
US (1) US3885192A (en)
JP (1) JPS5025167A (en)
CA (1) CA1000853A (en)
DE (1) DE2319689B2 (en)
FR (1) FR2218643B1 (en)
GB (1) GB1451956A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304172A2 (en) * 1973-02-16 1976-10-08 English Electric Valve Co Ltd PROGRESSIVE WAVE TUBE
FR2304171A2 (en) * 1973-02-16 1976-10-08 English Electric Valve Co Ltd PROGRESSIVE WAVE TUBE
FR2313765A1 (en) * 1975-06-06 1976-12-31 Hughes Aircraft Co FOCUSING DEVICE OF AN ELECTRON BEAM COUPLING TO A SLOW WAVE DEVICE FOR PROGRESSIVE WAVE TUBE

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057748A (en) * 1975-03-08 1977-11-08 English Electric Valve Company Ltd. Travelling wave tubes
US4072877A (en) * 1976-07-30 1978-02-07 English Electric Valve Co., Ltd. Travelling wave tubes
US4103207A (en) * 1977-03-11 1978-07-25 Litton Systems, Inc. Coupled cavity type traveling wave tube having improved pole piece structure
JPS57500217A (en) * 1980-01-28 1982-02-04
FR2479558A1 (en) * 1980-04-01 1981-10-02 Thomson Csf PROGRESSIVE WAVE TUBE WITH COUPLED CAVITIES AND FOCUSING BY ALTERNATE PERMANENT MAGNETS, AND AMPLIFIER ASSEMBLY COMPRISING SUCH A TUBE
DE3248693A1 (en) * 1982-12-30 1984-07-05 Siemens AG, 1000 Berlin und 8000 München HIKING FIELD TUBES WITH PERIODIC-PERMANENT-MAGNETIC FOCUSING SYSTEM
DE3676106D1 (en) * 1985-04-24 1991-01-24 Eev Ltd COUPLED HUMAN RUN TIME TUBES.
JPS62191690A (en) * 1986-02-17 1987-08-22 Tokico Ltd Horizontal type scroll compressor
JP2739833B2 (en) * 1995-03-31 1998-04-15 日本電気株式会社 Broadband traveling wave tube
DE102008064696B4 (en) * 2008-12-23 2022-01-27 Carl Zeiss Microscopy Gmbh Magnet array particle optical device and its use for imaging or illumination
DE102009032759B4 (en) * 2009-07-11 2011-12-15 Karlsruher Institut für Technologie Device for avoiding parasitic oscillations in cathode ray tubes
CN102163528B (en) * 2011-03-10 2013-05-15 安徽华东光电技术研究所 Multi-beam coupled cavity traveling-wave tube slow-wave structure and manufacturing method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324339A (en) * 1964-02-27 1967-06-06 Hughes Aircraft Co Periodic permanent magnet electron beam focusing arrangement for traveling-wave tubes having plural interaction cavities in bore of each annular magnet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010047A (en) * 1959-03-09 1961-11-21 Hughes Aircraft Co Traveling-wave tube
US3443146A (en) * 1966-02-16 1969-05-06 Westinghouse Electric Corp Conductive elements interconnecting adjacent members of the delay structure in a traveling wave tube
US3448326A (en) * 1966-12-08 1969-06-03 Varian Associates Twt with cloverleaf slow-wave circuit having specially shaped coupling slots
US3617802A (en) * 1970-05-06 1971-11-02 Us Navy Traveling wave tube
US3755706A (en) * 1972-03-20 1973-08-28 Varian Associates Miniaturized traveling wave tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324339A (en) * 1964-02-27 1967-06-06 Hughes Aircraft Co Periodic permanent magnet electron beam focusing arrangement for traveling-wave tubes having plural interaction cavities in bore of each annular magnet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304172A2 (en) * 1973-02-16 1976-10-08 English Electric Valve Co Ltd PROGRESSIVE WAVE TUBE
FR2304171A2 (en) * 1973-02-16 1976-10-08 English Electric Valve Co Ltd PROGRESSIVE WAVE TUBE
FR2313765A1 (en) * 1975-06-06 1976-12-31 Hughes Aircraft Co FOCUSING DEVICE OF AN ELECTRON BEAM COUPLING TO A SLOW WAVE DEVICE FOR PROGRESSIVE WAVE TUBE

Also Published As

Publication number Publication date
US3885192A (en) 1975-05-20
DE2319689A1 (en) 1974-09-05
CA1000853A (en) 1976-11-30
FR2218643B1 (en) 1978-10-27
GB1451956A (en) 1976-10-06
DE2319689B2 (en) 1976-09-09
JPS5025167A (en) 1975-03-17

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Legal Events

Date Code Title Description
ST Notification of lapse