GB1020233A - Improvements in or relating to hollow cathode structures - Google Patents
Improvements in or relating to hollow cathode structuresInfo
- 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
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.
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)
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 |
CN102172104B (en) | 2008-08-04 | 2015-08-26 | 北美Agc平板玻璃公司 | Plasma source and carry out the method for depositing thin film coatings with the chemical vapour deposition (CVD) of plasma enhancing |
MX2017007356A (en) * | 2014-12-05 | 2018-04-11 | Agc Flat Glass Europe S A | Hollow cathode plasma source. |
MX2017007357A (en) | 2014-12-05 | 2018-04-24 | Agc Flat Glass Na 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)
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 |
US2883568A (en) * | 1957-06-25 | 1959-04-21 | Rca Corp | Apparatus for producing thermallycool charged particles |
US2841726A (en) * | 1957-06-25 | 1958-07-01 | Ronald C Knechtli | Apparatus for producing thermallycool charged particles |
US3139551A (en) * | 1962-02-01 | 1964-06-30 | United Aircraft Corp | Conductivity augmentation |
-
0
- NL NL283468D patent/NL283468A/xx unknown
-
1961
- 1961-09-27 FR FR874284A patent/FR1308692A/en not_active Expired
-
1962
- 1962-08-10 US US216141A patent/US3253180A/en not_active Expired - Lifetime
- 1962-08-13 GB GB30913/62A patent/GB1020233A/en not_active Expired
- 1962-09-08 DE DEC27903A patent/DE1232663B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1232663B (en) | 1967-01-19 |
US3253180A (en) | 1966-05-24 |
FR1308692A (en) | 1962-11-09 |
NL283468A (en) |
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