JPS57141839A - Cathode made of lanthanum hexaboride single crystal - Google Patents

Cathode made of lanthanum hexaboride single crystal

Info

Publication number
JPS57141839A
JPS57141839A JP2651081A JP2651081A JPS57141839A JP S57141839 A JPS57141839 A JP S57141839A JP 2651081 A JP2651081 A JP 2651081A JP 2651081 A JP2651081 A JP 2651081A JP S57141839 A JPS57141839 A JP S57141839A
Authority
JP
Japan
Prior art keywords
single crystal
lanthanum hexaboride
cathode
hexaboride single
central part
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.)
Pending
Application number
JP2651081A
Other languages
Japanese (ja)
Inventor
Takukatsu Yoshida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2651081A priority Critical patent/JPS57141839A/en
Publication of JPS57141839A publication Critical patent/JPS57141839A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/15Cathodes heated directly by an electric current
    • H01J1/16Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Cold Cathode And The Manufacture (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To concentrate the distribution pattern of radiation current on a spot, and stabilize the electron beam by surrounding the central part of a signle crystal cathode with parts having a larger work function than that of the said central part. CONSTITUTION:The axial direction of a cathode made of lanthanum hexaboride single crystal is made to correspond to the <100> direction of a lanthanum hexaboride single crystal. The surface of an electron radiating area at the pointed end of the above cathode is constituted of a central part consisting of a (100) surface 301, and crystal surfaces which consist of (111) surfaces 302 and have a larger work function than that of the (100) surface 301.
JP2651081A 1981-02-25 1981-02-25 Cathode made of lanthanum hexaboride single crystal Pending JPS57141839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2651081A JPS57141839A (en) 1981-02-25 1981-02-25 Cathode made of lanthanum hexaboride single crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2651081A JPS57141839A (en) 1981-02-25 1981-02-25 Cathode made of lanthanum hexaboride single crystal

Publications (1)

Publication Number Publication Date
JPS57141839A true JPS57141839A (en) 1982-09-02

Family

ID=12195469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2651081A Pending JPS57141839A (en) 1981-02-25 1981-02-25 Cathode made of lanthanum hexaboride single crystal

Country Status (1)

Country Link
JP (1) JPS57141839A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007148507A1 (en) * 2006-06-19 2007-12-27 Denki Kagaku Kogyo Kabushiki Kaisha Electron source
JPWO2022064557A1 (en) * 2020-09-23 2022-03-31

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007148507A1 (en) * 2006-06-19 2007-12-27 Denki Kagaku Kogyo Kabushiki Kaisha Electron source
JPWO2022064557A1 (en) * 2020-09-23 2022-03-31

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