DocumentCode :
1470517
Title :
Emission Characteristics of Nanosized Scandia-Doped Dispenser Cathodes in Open Electron-Gun Structures
Author :
Liu, Wei ; Wang, Yiman ; Wang, Jinshu ; Wang, Yanchun ; Vancil, Bernard
Author_Institution :
Sch. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Volume :
58
Issue :
4
fYear :
2011
fDate :
4/1/2011 12:00:00 AM
Firstpage :
1241
Lastpage :
1246
Abstract :
The emission properties of nanosized scandia-doped dispenser cathodes tested in open-structure Pierce electron guns are reported in this paper. Over 100 A/cm2 and over 80 A/cm2 space-charge-limited current densities have been obtained at the operating temperatures of 950 °Cb and 1025°Cb for cathodes with planar emitting surfaces and cathodes with concave emitting surfaces, respectively, at rated anode voltages.
Keywords :
current density; doping; electron guns; scandium; space charge; thermionic cathodes; thermionic electron emission; JkJk:ScO3; concave emitting surface; nanosized scandia-doped dispenser cathode; open-structure Pierce electron gun; planar emitting surface; space-charge-limited current density; temperature 1025 degC; temperature 950 degC; vacuum electron device; Anodes; Cathodes; Current density; Electron tubes; Temperature measurement; Voltage measurement; Pierce electron gun; scandate cathode; thermionic emission; vacuum electron devices (VEDs);
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/TED.2011.2105877
Filename :
5729800
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1470517
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