Title :
The extended Schottky cathode
Author :
Hinrichs, Clarence H. ; Mackie, William A. ; Pincosy, Philip A. ; Poulsen, Peter
Author_Institution :
Linfield Res. Inst., McMinnville, OR, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
Cathodes operating in the range of electric field strength and temperatures falling within the extended Schottky domain are discussed for applications requiring high current densities from a broad area cathode. Generally, these cathodes are operated in a pulsed high-voltage mode. Current densities of up to 300 A/cm2 have been achieved without breakdown. Cathode performance is limited by space-charge effects and excessive evaporation at the high operating temperatures required
Keywords :
Schottky effect; cathodes; current density; space charge; broad area cathode; electric field strength; evaporation; extended Schottky domain; high current densities; high operating temperatures; pulsed high-voltage mode; space-charge effects; Cathodes; Current density; Electric breakdown; Electron emission; Free electron lasers; Laboratories; Levee; Masers; Surface emitting lasers; Temperature distribution;
Journal_Title :
Electron Devices, IEEE Transactions on
