DocumentCode :
2924893
Title :
Improved electron emission from W-Ir dispenser cathodes
Author :
Ravi, Meduri ; Kumar, K. Santosh ; Devi, P. Durga ; Bhat, K. Seetharama ; Kumar, Lalit
Author_Institution :
Microwave Tube R&D Centre, Bangalore, India
fYear :
2012
fDate :
24-26 April 2012
Firstpage :
465
Lastpage :
466
Abstract :
W-Ir dispenser cathodes have been fabricated with lithium oxide doped impregnant mix and tested for their emission characteristics in a closely spaced diode configuration. With Li2O doping, emission current density improved from 7.5 to 32 A/cm2 at 1075°C. 32000 hours of life as on date has been measured.
Keywords :
cathodes; current density; iridium; lithium compounds; semiconductor diodes; thermionic electron emission; tungsten; Li2O; W-Ir; closely spaced diode configuration; dispenser cathodes; emission characteristics; emission current density; improved electron emission; lithium oxide doped impregnant mix; temperature 1075 degC; thermionic electron emission; time 32000 hour; Barium; Cathodes; Current measurement; Lithium; Temperature measurement; Tungsten; Voltage measurement; Dispenser Cathodes; Mixed Metal Matrix; Thermionic emission;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0368-2
Type :
conf
DOI :
10.1109/IVESC.2012.6264198
Filename :
6264198
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=2924893
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