FR2402297A1 - ELECTRONIC EMISSION CATHODE - Google Patents

ELECTRONIC EMISSION CATHODE

Info

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
Application number
FR7825256A
Other languages
French (fr)
Other versions
FR2402297B1 (en
Inventor
Wilhelm Brunger
Gottfried Mollenstedt
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.)
OC Oerlikon Balzers AG
Original Assignee
Balzers AG
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 Balzers AG filed Critical Balzers AG
Publication of FR2402297A1 publication Critical patent/FR2402297A1/en
Application granted granted Critical
Publication of FR2402297B1 publication Critical patent/FR2402297B1/fr
Granted legal-status Critical Current

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.The subject of the invention is an emissive lanthanum hexaboride (LaB6) cathode. The emissive body 1 is embedded in an auxiliary element 2 which is also in contact with the heating resistor 3. The operating temperature of the cathode is obtained by transmitting the heat given off by the resistor through the element 2. The latter. This is made of a material which does not react with LaB6. Application in particular to tubes for generating electron beams.

FR7825256A 1977-09-02 1978-09-01 ELECTRONIC EMISSION CATHODE Granted FR2402297A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1066577A CH617793A5 (en) 1977-09-02 1977-09-02

Publications (2)

Publication Number Publication Date
FR2402297A1 true FR2402297A1 (en) 1979-03-30
FR2402297B1 FR2402297B1 (en) 1984-02-10

Family

ID=4365548

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7825256A Granted FR2402297A1 (en) 1977-09-02 1978-09-01 ELECTRONIC EMISSION CATHODE

Country Status (5)

Country Link
CH (1) CH617793A5 (en)
DE (2) DE2832027C3 (en)
FR (1) FR2402297A1 (en)
GB (1) GB2003655B (en)
NL (1) NL7808183A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440610A1 (en) * 1978-11-01 1980-05-30 Denki Kagaku Kogyo Kk THERMIONIC CATHODE ASSEMBLY

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE
DE3120454A1 (en) * 1981-05-22 1982-12-09 geb. Vlasova Margarita Sergeevna Moskva Čupina Field emission cathode
JPS57196443A (en) * 1981-05-29 1982-12-02 Denki Kagaku Kogyo Kk Manufacture of hot cathode
CH672860A5 (en) * 1986-09-29 1989-12-29 Balzers Hochvakuum
JP6636472B2 (en) * 2017-02-28 2020-01-29 株式会社日立ハイテクノロジーズ Electron source and electron beam device using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1061633A (en) * 1951-03-28 1954-04-14 Thomson Houston Comp Francaise Substances with high emissivity
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 (en) * 1974-11-29 1976-06-10 Canadian Patents Dev Electron microscope electron source - with lanthanum hexaboride bead heated by current passage through rhenium or tantalum (alloy) wires
FR2388405A1 (en) * 1977-04-18 1978-11-17 Hitachi Ltd MANUFACTURING A CATHODE FOR AN ELECTRON SOURCE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1061633A (en) * 1951-03-28 1954-04-14 Thomson Houston Comp Francaise Substances with high emissivity
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 (en) * 1974-11-29 1976-06-10 Canadian Patents Dev Electron microscope electron source - with lanthanum hexaboride bead heated by current passage through rhenium or tantalum (alloy) wires
FR2388405A1 (en) * 1977-04-18 1978-11-17 Hitachi Ltd MANUFACTURING A CATHODE FOR AN ELECTRON SOURCE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXRV/66 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440610A1 (en) * 1978-11-01 1980-05-30 Denki Kagaku Kogyo Kk THERMIONIC CATHODE ASSEMBLY

Also Published As

Publication number Publication date
DE2832027B2 (en) 1981-07-09
FR2402297B1 (en) 1984-02-10
GB2003655A (en) 1979-03-14
DE2832027A1 (en) 1979-03-15
DE2832027C3 (en) 1987-05-07
CH617793A5 (en) 1980-06-13
GB2003655B (en) 1982-05-26
DE7821817U1 (en) 1987-06-04
NL7808183A (en) 1979-03-06

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Legal Events

Date Code Title Description
ST Notification of lapse