JPS5519782A - Electron gun - Google Patents
Electron gunInfo
- 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
Links
Landscapes
- Electron Sources, Ion Sources (AREA)
- Solid Thermionic Cathode (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
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)
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 |
-
1978
- 1978-07-31 JP JP9344078A patent/JPS5519782A/en active Pending
Cited By (7)
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 |
JPH0419663B2 (en) * | 1982-02-25 | 1992-03-31 | Tokyo Shibaura Electric Co | |
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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