Title :
Measures to alleviate the back bombardment effect of thermionic RF electron gun
Author :
Huang, Yi-Pai ; Xie, J.
Author_Institution :
Inst. of High Energy Phys., Beijing, China
Abstract :
The thermionic RF electron gun finds application as a high-brightness electron source for RF linacs. However, cathode heating from the back-bombardment effect (BBE) causes a ramp in the macropulse beam current and limits the usable pulse width. Three methods for alleviating the BEE, ring cathode, magnetic deflection, and laser-assisted heating, were studied theoretically and experimentally. The results of these studies are reported.<>
Keywords :
electron guns; electron sources; RF linacs; back-bombardment effect; cathode heating; high-brightness electron source; laser-assisted heating; macropulse beam current; magnetic deflection; pulse width; ring cathode; thermionic RF electron; Apertures; Cathodes; Costs; Electron beams; Electron emission; Heating; Magnetic field measurement; Radio frequency; Ring lasers; Temperature;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164855
