GB1020233A - Improvements in or relating to hollow cathode structures - Google Patents

Improvements in or relating to hollow cathode structures

Info

Publication number
GB1020233A
GB1020233A GB30913/62A GB3091362A GB1020233A GB 1020233 A GB1020233 A GB 1020233A GB 30913/62 A GB30913/62 A GB 30913/62A GB 3091362 A GB3091362 A GB 3091362A GB 1020233 A GB1020233 A GB 1020233A
Authority
GB
United Kingdom
Prior art keywords
cavity
caesium
heated
vapour
ionized
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
GB30913/62A
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.)
CSF
Thales SA
Original Assignee
CSF
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF, CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF
Publication of GB1020233A publication Critical patent/GB1020233A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/025—Electron guns using a discharge in a gas or a vapour as electron source
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/025—Hollow cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/006—Tubes with electron bombarded gas (e.g. with plasma filter)

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

1,020,233. Thermionic cathodes. C.S.F.- COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Aug. 13, 1962 [Sept. 27, 1961], No. 30913/62. Heading H1D. A hollow cathode structure comprising a cavity 1 having an inner emissive coating 2 with associated heating means, and a restricted opening 3 for escape of electrons, is connected by a conduit 7 to a source of ionizable vapour which is ionized within cavity 1 to compensate the electron space charge therein by forming a plasma. As shown, cavity 1 is surrounded by a heating element 4, in a thermally-insulating envelope 5, and is connected to a heated caesium reservoir 10. Caesium vapour passes through porous member 9 and is deflected by barrier 13 and ionized by contact with a high work function emissive layer 2 of W, Re, Ta or Nb. The heating of the caesium reservoir and/or the cavity is regulated so that the electronic space charge is compensated by the caesium ions and a plasma is obtained, electrons being withdrawn therefrom by an external anode field. In an alternative arrangement, using a low work function emissive coating 2, the caesium vapour is ionized by contact with a directly-heated tungsten filament which replaces shield 13. Also, spherical cavity 1 may be replaced by a cylindrical cavity of circular or rectangular cross-section, the caesium vapour may be introduced at right angles to the orifice 3, and the ionizer may be a heated plate. Alternatively, the emissive layer may be heated by radiation from a heated ionizer or by electronic bombardment. A plurality of cavities may be arranged side-by-side to obtain not only a high density but also a large total current intensity.
GB30913/62A 1961-09-27 1962-08-13 Improvements in or relating to hollow cathode structures Expired GB1020233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR874284A FR1308692A (en) 1961-09-27 1961-09-27 Hollow cathode improvements

Publications (1)

Publication Number Publication Date
GB1020233A true GB1020233A (en) 1966-02-16

Family

ID=8763575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30913/62A Expired GB1020233A (en) 1961-09-27 1962-08-13 Improvements in or relating to hollow cathode structures

Country Status (5)

Country Link
US (1) US3253180A (en)
DE (1) DE1232663B (en)
FR (1) FR1308692A (en)
GB (1) GB1020233A (en)
NL (1) NL283468A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1437482A (en) * 1965-03-01 1966-05-06 Csf Improvements to cavities that generate particle flows
US3523210A (en) * 1966-05-20 1970-08-04 Xerox Corp Gas discharge neutralizer including a charged particle source
US3515932A (en) * 1967-04-27 1970-06-02 Hughes Aircraft Co Hollow cathode plasma generator
US4475063A (en) * 1981-06-22 1984-10-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Hollow cathode apparatus
EA020763B9 (en) 2008-08-04 2015-05-29 Эй-Джи-Си Флет Гласс Норт Эмерике, Инк. Plasma source and methods for depositing thin film coatings using plasma enhanced chemical vapor deposition
EA201791234A1 (en) * 2014-12-05 2017-11-30 Эй-Джи-Си Гласс Юроуп, С.А. PLASMA SOURCE WITH A HALF CATHODE
WO2016089427A1 (en) 2014-12-05 2016-06-09 Agc Flat Glass North America, Inc. Plasma source utilizing a macro-particle reduction coating and method of using a plasma source utilizing a macro-particle reduction coating for deposition of thin film coatings and modification of surfaces
US9721764B2 (en) 2015-11-16 2017-08-01 Agc Flat Glass North America, Inc. Method of producing plasma by multiple-phase alternating or pulsed electrical current
US9721765B2 (en) 2015-11-16 2017-08-01 Agc Flat Glass North America, Inc. Plasma device driven by multiple-phase alternating or pulsed electrical current
US10242846B2 (en) 2015-12-18 2019-03-26 Agc Flat Glass North America, Inc. Hollow cathode ion source
US10573499B2 (en) 2015-12-18 2020-02-25 Agc Flat Glass North America, Inc. Method of extracting and accelerating ions

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2330848A (en) * 1925-12-21 1943-10-05 Raytheon Mfg Co Gaseous discharge device
US2217436A (en) * 1938-05-26 1940-10-08 Westinghouse Electric & Mfg Co Cathode for electron tubes
DE845677C (en) * 1949-12-01 1952-08-04 Jaeger A G Hollow electrode with a glass insulating jacket, especially for cold cathode tubes
US2810848A (en) * 1954-06-01 1957-10-22 Bendix Aviat Corp Method and means of making stator coil end turns
US2841726A (en) * 1957-06-25 1958-07-01 Ronald C Knechtli Apparatus for producing thermallycool charged particles
US2883568A (en) * 1957-06-25 1959-04-21 Rca Corp Apparatus for producing thermallycool charged particles
US3139551A (en) * 1962-02-01 1964-06-30 United Aircraft Corp Conductivity augmentation

Also Published As

Publication number Publication date
DE1232663B (en) 1967-01-19
NL283468A (en)
FR1308692A (en) 1962-11-09
US3253180A (en) 1966-05-24

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