scholarly journals Cathodes DARHT-II Thermionic Cathode Experience

2018 ◽  
Author(s):  
Martin E. Schulze
Keyword(s):  
Thermionic Cathode

Some critical materials problems of thermionic cathode systems for fission-heat conversion

1963 ◽  
Vol 3 (1) ◽  
pp. 93-99
Author(s):  
L. Yang ◽  
R.G. Hudson ◽  
F.D. Carpenter ◽  
A.F. Weinberg
Keyword(s):  
Thermionic Cathode ◽  
Critical Materials

Predictions of Current Attachment at Thermionic Cathode for TIG Arcs

2008 ◽  
Vol 580-582 ◽  
pp. 319-322 ◽  
Author(s):  
Manabu Tanaka ◽  
Kentaro Yamamoto ◽  
Tashiro Shinichi ◽  
John J. Lowke
Keyword(s):  
Melting Point ◽  
Work Function ◽  
Atmospheric Pressure ◽  
The Other ◽  
Numerical Calculations ◽  
Maximum Temperature ◽  
Arc Plasma ◽  
Melting Points ◽  
Thermionic Cathode ◽  
Uniform Current

Study of current attachment at thermionic cathode for TIG arc at atmospheric pressure is attempted from numerical calculations of arc-electrodes unified model. The calculations show that the maximum temperature of arc plasma close to the cathode tip for W-2% ThO2 reaches 19,000 K and it is the highest value in comparison with the other temperatures for W-2% La2O3 and W-2% CeO2, because the current attachment at the cathode tip is constricted by a centralized limitation of liquid area of ThO2 due to its higher melting point. The calculations also show that, in cases of W- 2% La2O3 and W-2% CeO2, the liquid areas of La2O3 and Ce2O3 are widely expanded at the cathode tip due to their lower melting points and then produce uniform current attachments at the cathode. It is concluded that the current attachment at thermionic cathode is strongly dependent on work function, melting point and Richardson constant of emitter materials.

scholarly journals Theory and simulation of backbombardment in single-cell thermionic-cathode electron guns

2015 ◽  
Vol 18 (4) ◽  
Author(s):  
J. P. Edelen ◽  
S. G. Biedron ◽  
J. R. Harris ◽  
S. V. Milton ◽  
J. W. Lewellen
Keyword(s):  
Single Cell ◽  
Thermionic Cathode ◽  
Electron Guns

Improvement of beam macropulse properties using slim thermionic cathode in IAE RF gun

2004 ◽  
pp. 408-411
Author(s):  
Toshiteru Kii ◽  
Atsushi Miyasako ◽  
Syusuke Hayashi ◽  
Kai Masuda ◽  
Hideaki Ohgaki ◽  
...  
Keyword(s):  
Thermionic Cathode ◽  
Rf Gun

Thermal analysis of heating structure for thermionic cathode electron gun

2010 ◽  
Vol 22 (7) ◽  
pp. 1607-1609 ◽  
Author(s):  
程诚 Cheng Cheng ◽  
程道喜 Cheng Daoxi ◽  
郑曙昕 Zheng Shuxin ◽  
吕进 Lü Jin ◽  
多金生 Duo Jinsheng
Keyword(s):  
Thermal Analysis ◽  
Electron Gun ◽  
Thermionic Cathode

Back electron bombardment effect on independently tunable cells thermionic cathode RF gun

2013 ◽  
Vol 25 (s) ◽  
pp. 133-136
Author(s):  
柏伟 Bai Wei ◽  
黎明 Li Ming ◽  
王汉斌 Wang Hanbin ◽  
杨兴繁 Yang Xingfan ◽  
单李军 Shan Lijun ◽  
...  
Keyword(s):  
Electron Bombardment ◽  
Thermionic Cathode ◽  
Rf Gun
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