JPS5686433A - High brightness electron gun - Google Patents

High brightness electron gun

Info

Publication number
JPS5686433A
JPS5686433A JP16392879A JP16392879A JPS5686433A JP S5686433 A JPS5686433 A JP S5686433A JP 16392879 A JP16392879 A JP 16392879A JP 16392879 A JP16392879 A JP 16392879A JP S5686433 A JPS5686433 A JP S5686433A
Authority
JP
Japan
Prior art keywords
high brightness
hot cathode
electron gun
cab6
cone
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
JP16392879A
Other languages
Japanese (ja)
Other versions
JPS6129093B2 (en
Inventor
Hirotoshi Hagiwara
Hideo Hiraoka
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.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
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 Denki Kagaku Kogyo KK filed Critical Denki Kagaku Kogyo KK
Priority to JP16392879A priority Critical patent/JPS5686433A/en
Publication of JPS5686433A publication Critical patent/JPS5686433A/en
Publication of JPS6129093B2 publication Critical patent/JPS6129093B2/ja
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
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To obtain high brightness by specifying the axial direction of a hot cathode which uses a CaB6 type boride single crystal and selecting its angle of a cone within the specified range. CONSTITUTION:The axial direction [001], [011], and [111] of a hot cathode consisting of a boride single crystal of CaB6 type crystal structure are made to coincide with the direction of the crysral axis selected from those which are equivalent to afore-mentioned directions. The angle of a cone is selected to a range within 100 to 180 degree. This hot cathode shows high brightness at 1,450-1,600 deg.C.
JP16392879A 1979-12-17 1979-12-17 High brightness electron gun Granted JPS5686433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16392879A JPS5686433A (en) 1979-12-17 1979-12-17 High brightness electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16392879A JPS5686433A (en) 1979-12-17 1979-12-17 High brightness electron gun

Publications (2)

Publication Number Publication Date
JPS5686433A true JPS5686433A (en) 1981-07-14
JPS6129093B2 JPS6129093B2 (en) 1986-07-04

Family

ID=15783481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16392879A Granted JPS5686433A (en) 1979-12-17 1979-12-17 High brightness electron gun

Country Status (1)

Country Link
JP (1) JPS5686433A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840729A (en) * 1981-09-02 1983-03-09 Denki Kagaku Kogyo Kk High brightness utilizing method from single crystal lanthanum boride cathode
JPH01143125A (en) * 1987-11-27 1989-06-05 Denki Kagaku Kogyo Kk Ion source device for large-current ion implantation
JP2011014529A (en) * 2009-04-20 2011-01-20 National Institute For Materials Science Cold-cathode field-emission electron source including rare-earth hexaboride

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110563A (en) * 1976-03-15 1977-09-16 Hitachi Ltd Hexagonal boride cathode

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110563A (en) * 1976-03-15 1977-09-16 Hitachi Ltd Hexagonal boride cathode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840729A (en) * 1981-09-02 1983-03-09 Denki Kagaku Kogyo Kk High brightness utilizing method from single crystal lanthanum boride cathode
JPH0418408B2 (en) * 1981-09-02 1992-03-27 Denki Kagaku Kogyo Kk
JPH01143125A (en) * 1987-11-27 1989-06-05 Denki Kagaku Kogyo Kk Ion source device for large-current ion implantation
JP2011014529A (en) * 2009-04-20 2011-01-20 National Institute For Materials Science Cold-cathode field-emission electron source including rare-earth hexaboride

Also Published As

Publication number Publication date
JPS6129093B2 (en) 1986-07-04

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