JPS5519782A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5519782A
JPS5519782A JP9344078A JP9344078A JPS5519782A JP S5519782 A JPS5519782 A JP S5519782A JP 9344078 A JP9344078 A JP 9344078A JP 9344078 A JP9344078 A JP 9344078A JP S5519782 A JPS5519782 A JP S5519782A
Authority
JP
Japan
Prior art keywords
cathode
heat generating
computor
current
power source
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
JP9344078A
Other languages
Japanese (ja)
Inventor
Tadahiro Takigawa
Yoshihide Kato
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9344078A priority Critical patent/JPS5519782A/en
Publication of JPS5519782A publication Critical patent/JPS5519782A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To perform stable heating of cathode through constant power control.
CONSTITUTION: Cathode 21 is held between the heat generating members 22 composed of pyloritic graphite. Cathode heating power source 23 is connected across said member 22. The computor 28 calculates the power consumption from the voltage and current applied on said member 22 to calculate the error from the preset value thus to produce signal corresponding with the correction current. The power source 23 receives signal from the computor 28 to correct the current to heat generating member 22. Consequently the power consumption of heat generating member 22 is continuously maintained to the setting level.
COPYRIGHT: (C)1980,JPO&Japio
JP9344078A 1978-07-31 1978-07-31 Electron gun Pending JPS5519782A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9344078A JPS5519782A (en) 1978-07-31 1978-07-31 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9344078A JPS5519782A (en) 1978-07-31 1978-07-31 Electron gun

Publications (1)

Publication Number Publication Date
JPS5519782A true JPS5519782A (en) 1980-02-12

Family

ID=14082376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9344078A Pending JPS5519782A (en) 1978-07-31 1978-07-31 Electron gun

Country Status (1)

Country Link
JP (1) JPS5519782A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5659421A (en) * 1979-10-12 1981-05-22 Jeol Ltd Electron gun
JPS5760646A (en) * 1980-09-27 1982-04-12 Fujitsu Ltd Thermion emission type electron gun and control method
JPS581959A (en) * 1981-06-29 1983-01-07 Nippon Telegr & Teleph Corp <Ntt> Filament heater of electron gun for electron microscope
JPS58147945A (en) * 1982-02-25 1983-09-02 Toshiba Corp How to use electron gun
FR3075673A1 (en) * 2017-12-26 2019-06-28 Addup APPARATUS FOR SELECTIVE ADDITIVE PRODUCTION WITH INDIRECT HEATING CATHODE ELECTRON SOURCE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5659421A (en) * 1979-10-12 1981-05-22 Jeol Ltd Electron gun
JPS5760646A (en) * 1980-09-27 1982-04-12 Fujitsu Ltd Thermion emission type electron gun and control method
JPS581959A (en) * 1981-06-29 1983-01-07 Nippon Telegr & Teleph Corp <Ntt> Filament heater of electron gun for electron microscope
JPS58147945A (en) * 1982-02-25 1983-09-02 Toshiba Corp How to use electron gun
FR3075673A1 (en) * 2017-12-26 2019-06-28 Addup APPARATUS FOR SELECTIVE ADDITIVE PRODUCTION WITH INDIRECT HEATING CATHODE ELECTRON SOURCE
WO2019129988A1 (en) * 2017-12-26 2019-07-04 Addup Selective additive manufacturing apparatus with indirectly heated cathode electron source

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