DocumentCode :
2813375
Title :
A novel nanocomposite scandia-tungsten coated dispenser cathode
Author :
Wang, Ping ; Li, Ji
Author_Institution :
Beijing Vacuum Electron. Res. Inst., Beijing, China
fYear :
2009
fDate :
28-30 April 2009
Firstpage :
189
Lastpage :
190
Abstract :
This paper will present a novel nanocomposite scandia-tungsten coated dispenser cathode, which has the capability to provide more than 150 A/cm2 knee point current density at 1000degCb. The authors pointed out that the generation and maintenance of emissive islets on the cathode surface is the main factor to decide the Sc-type cathodes emission mechanism is incline to dominating thermionic emission or field enhancement thermionic emission.
Keywords :
current density; nanocomposites; scandium; thermionic cathodes; thermionic emission; tungsten; ScW; cathode surface; cathodes emission; coated dispenser cathode; current density; emissive islet generation; emissive islet maintenance; nanocomposite scandia-tungsten; thermionic emission; Cathodes; Current density; Knee; Powders; Rough surfaces; Sputtering; Surface roughness; Temperature; Testing; Thermionic emission; coated dispenser cathode; high current density; nanocomposite scandia-tungsten;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
Type :
conf
DOI :
10.1109/IVELEC.2009.5193516
Filename :
5193516
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=2813375
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