Title :
Comment on progress in scandate cathodes
Author :
Hasker, Jan ; Crombeen, J.E. ; Van Dorst, Peter A M
Author_Institution :
Philips Res. Labs., Eidhoven, Netherlands
Abstract :
Emission capability and emission recovery after ion bombardment are discussed. Impregnated top-layer scandate cathodes show better performance than cathodes with a mixed matrix of tungsten and scandia and impregnated cathodes with a sputtered layer consisting of tungsten and scandia. The recovery of scandate cathodes has been considerably improved, and it has been shown that fast emission recovery after ion bombardment is most probably feasible at a cathode operating temperature of 950 degrees C/sub b/.<>
Keywords :
scandium compounds; thermionic cathodes; thermionic electron emission; 950 C; Sc/sub 2/O/sub 3/-W; cathode operating temperature; emission capability; emission recovery after ion bombardment; impregnated cathodes; progress; sputtered layer; Anodes; Cathodes; Current density; History; Schottky diodes; Temperature distribution; Transmission line matrix methods; Tungsten; Voltage;
Journal_Title :
Electron Devices, IEEE Transactions on
