FR2402297A1 - Cathode a emission electronique - Google Patents
Cathode a emission electroniqueInfo
- Publication number
- FR2402297A1 FR2402297A1 FR7825256A FR7825256A FR2402297A1 FR 2402297 A1 FR2402297 A1 FR 2402297A1 FR 7825256 A FR7825256 A FR 7825256A FR 7825256 A FR7825256 A FR 7825256A FR 2402297 A1 FR2402297 A1 FR 2402297A1
- Authority
- FR
- France
- Prior art keywords
- emission cathode
- electronic emission
- cathode
- lab6
- emissive
- 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.)
- Granted
Links
Classifications
-
- 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
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
- H01J1/148—Solid thermionic cathodes characterised by the material with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
-
- 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
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
Landscapes
- Solid Thermionic Cathode (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
L'invention a pour objet une cathode émissive en hexaborure de lanthane (LaB6 ). Le corps émissif 1 est encastré dans un élément auxiliaire 2 qui est également en contact avec la résistance de chauffage 3. La température de fonctionnement de la cathode est obtenue par transmission de la chaleur dégagée par la résistance à travers l'élément 2. Celui-ci est réalisé en un matériau qui ne réagit pas avec le LaB6 . Application notamment aux tubes générateurs de faisceaux d'électrons.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1066577A CH617793A5 (fr) | 1977-09-02 | 1977-09-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2402297A1 true FR2402297A1 (fr) | 1979-03-30 |
FR2402297B1 FR2402297B1 (fr) | 1984-02-10 |
Family
ID=4365548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7825256A Granted FR2402297A1 (fr) | 1977-09-02 | 1978-09-01 | Cathode a emission electronique |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH617793A5 (fr) |
DE (2) | DE7821817U1 (fr) |
FR (1) | FR2402297A1 (fr) |
GB (1) | GB2003655B (fr) |
NL (1) | NL7808183A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440610A1 (fr) * | 1978-11-01 | 1980-05-30 | Denki Kagaku Kogyo Kk | Ensemble de cathode thermionique |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2445605A1 (fr) * | 1978-12-27 | 1980-07-25 | Thomson Csf | Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode |
DE3120454A1 (de) * | 1981-05-22 | 1982-12-09 | geb. Vlasova Margarita Sergeevna Moskva Čupina | Feldemissionskatode |
JPS57196443A (en) * | 1981-05-29 | 1982-12-02 | Denki Kagaku Kogyo Kk | Manufacture of hot cathode |
CH672860A5 (fr) * | 1986-09-29 | 1989-12-29 | Balzers Hochvakuum | |
JP6636472B2 (ja) * | 2017-02-28 | 2020-01-29 | 株式会社日立ハイテクノロジーズ | 電子源およびそれを用いた電子線装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1061633A (fr) * | 1951-03-28 | 1954-04-14 | Thomson Houston Comp Francaise | Substances à pouvoir émissif élevé |
GB1045396A (en) * | 1965-07-23 | 1966-10-12 | Standard Telephones Cables Ltd | Thermionic cathodes |
GB1210007A (en) * | 1968-07-05 | 1970-10-28 | Mullard Ltd | Cathode |
DE2553047A1 (de) * | 1974-11-29 | 1976-06-10 | Canadian Patents Dev | Elektronenquelle |
FR2388405A1 (fr) * | 1977-04-18 | 1978-11-17 | Hitachi Ltd | Fabrication d'une cathode pour une source d'electrons |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3532923A (en) * | 1969-03-17 | 1970-10-06 | Ibm | Pyrolytic graphite support for lanthanum hexaboride cathode emitter |
US3803677A (en) * | 1972-04-28 | 1974-04-16 | Air Liquide | Method for making cathodes for electron guns |
-
1977
- 1977-09-02 CH CH1066577A patent/CH617793A5/de not_active IP Right Cessation
-
1978
- 1978-07-21 DE DE19787821817 patent/DE7821817U1/de not_active Expired
- 1978-07-21 DE DE19782832027 patent/DE2832027C3/de not_active Expired
- 1978-08-02 GB GB7831971A patent/GB2003655B/en not_active Expired
- 1978-08-03 NL NL7808183A patent/NL7808183A/xx not_active Application Discontinuation
- 1978-09-01 FR FR7825256A patent/FR2402297A1/fr active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1061633A (fr) * | 1951-03-28 | 1954-04-14 | Thomson Houston Comp Francaise | Substances à pouvoir émissif élevé |
GB1045396A (en) * | 1965-07-23 | 1966-10-12 | Standard Telephones Cables Ltd | Thermionic cathodes |
GB1210007A (en) * | 1968-07-05 | 1970-10-28 | Mullard Ltd | Cathode |
DE2553047A1 (de) * | 1974-11-29 | 1976-06-10 | Canadian Patents Dev | Elektronenquelle |
FR2388405A1 (fr) * | 1977-04-18 | 1978-11-17 | Hitachi Ltd | Fabrication d'une cathode pour une source d'electrons |
Non-Patent Citations (1)
Title |
---|
EXRV/66 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440610A1 (fr) * | 1978-11-01 | 1980-05-30 | Denki Kagaku Kogyo Kk | Ensemble de cathode thermionique |
Also Published As
Publication number | Publication date |
---|---|
DE7821817U1 (de) | 1987-06-04 |
CH617793A5 (fr) | 1980-06-13 |
DE2832027A1 (de) | 1979-03-15 |
GB2003655B (en) | 1982-05-26 |
GB2003655A (en) | 1979-03-14 |
DE2832027C3 (de) | 1987-05-07 |
NL7808183A (nl) | 1979-03-06 |
DE2832027B2 (de) | 1981-07-09 |
FR2402297B1 (fr) | 1984-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |