Title :
Beam test of the coaxial cavity for the thermionic triode type RF gun
Author :
Torgasin, K. ; Mishima, Kiyoshi ; Inukai, Motoharu ; Okumura, Katsuhiro ; Nogi, T. ; Yoshida, Kenta ; Negm, H. ; Omer, M. ; Zen, Heishun ; Kii, T. ; Nagasaki, K. ; Masuda, Kohji ; Ohgaki, H.
Author_Institution :
Grad. Sch. of Energy Sci., Kyoto Univ., Kyoto, Japan
fDate :
June 30 2014-July 4 2014
Abstract :
The KU-FEL (Kyoto University Free Electron Laser) facility uses an S-band 4,5 cell thermionic RF gun as an electron source. The gun is strongly suffering from back-bombarding effect. In order to mitigate the energy of back streaming electrons the used RF gun shall be modified to triode type. For this reason a RF driven pre-bunching small coaxial cavity should be attached to the main 4,5 cell gun. The coaxial cavity was designed and fabricated. We report here results of a hot test of the coaxial cavity.
Keywords :
electron guns; electron sources; triodes; 4,5 cell thermionic RF gun; KU-FEL; Kyoto University free electron laser; RF driven pre-bunching; S-band; back streaming electrons; back-bombarding effect; beam test; coaxial cavity; electron source; thermionic triode; Cavity resonators; Educational institutions; Electron sources; Electronic mail; Free electron lasers; Laser beams; Radio frequency;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2014 Tenth International
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4799-5770-5
DOI :
10.1109/IVESC.2014.6892089
