JPS56106334A - Thermion emission type cathode - Google Patents

Thermion emission type cathode

Info

Publication number
JPS56106334A
JPS56106334A JP804180A JP804180A JPS56106334A JP S56106334 A JPS56106334 A JP S56106334A JP 804180 A JP804180 A JP 804180A JP 804180 A JP804180 A JP 804180A JP S56106334 A JPS56106334 A JP S56106334A
Authority
JP
Japan
Prior art keywords
cathode
zig
electron
pellet
service life
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
JP804180A
Other languages
Japanese (ja)
Inventor
Chokichiro Shibata
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.)
New Japan Radio Co Ltd
Japan Radio Co Ltd
Original Assignee
New Japan Radio Co Ltd
Japan Radio 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 New Japan Radio Co Ltd, Japan Radio Co Ltd filed Critical New Japan Radio Co Ltd
Priority to JP804180A priority Critical patent/JPS56106334A/en
Publication of JPS56106334A publication Critical patent/JPS56106334A/en
Pending 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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Abstract

PURPOSE:To improve the insulation resistance between the cathode and the heaters and to lengthen the service life, by adhering an electron emission suppressing metal such as Ti to the portion not required of the electron emission in the cathode face. CONSTITUTION:A pellet 7 of an immersed type cathode where an electroradioactive substance is immersed in a metal base having high melting point is tightly contacted to a zig 8 to expose the portion not required to emit the electron, while a positive electrode 9 is connected to the zig 8. A target board 11 such as Ti board is held on the negative electrode 10, then high frequency voltage is applied from a power source 13 under inert gas environment 12 such as Ar. With such device Ti will adhere to the positive side of the electrode or the exposed portion of the cathode pellet 7. Said Ti layer can be adhered to the desired depth which is approximately proportional to the time being applied with high voltage. Consequently desired electron beam shape is obtained without producing the thermal deformation of the grid or the noise while causing no useless consumption of the radioactive substance, resulting in the lengthening of the service life.
JP804180A 1980-01-25 1980-01-25 Thermion emission type cathode Pending JPS56106334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP804180A JPS56106334A (en) 1980-01-25 1980-01-25 Thermion emission type cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP804180A JPS56106334A (en) 1980-01-25 1980-01-25 Thermion emission type cathode

Publications (1)

Publication Number Publication Date
JPS56106334A true JPS56106334A (en) 1981-08-24

Family

ID=11682254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP804180A Pending JPS56106334A (en) 1980-01-25 1980-01-25 Thermion emission type cathode

Country Status (1)

Country Link
JP (1) JPS56106334A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62145620A (en) * 1985-12-20 1987-06-29 Hitachi Ltd Impregnated cathode
US5285129A (en) * 1988-05-31 1994-02-08 Canon Kabushiki Kaisha Segmented electron emission device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136559A (en) * 1976-05-10 1977-11-15 Varian Associates Thermion source with bond control lattice

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52136559A (en) * 1976-05-10 1977-11-15 Varian Associates Thermion source with bond control lattice

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62145620A (en) * 1985-12-20 1987-06-29 Hitachi Ltd Impregnated cathode
US5285129A (en) * 1988-05-31 1994-02-08 Canon Kabushiki Kaisha Segmented electron emission device
US5576051A (en) * 1988-05-31 1996-11-19 Canon Kabushiki Kaisha Multiple electron emission device

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