Title :
Status of high polarization DC high voltage Gallium Arsenide photoelectron guns
Author :
Poelker, M. ; Adderley, P. ; Brittian, J. ; Clark, J. ; Grames, J. ; Hansknecht, J. ; McCarter, J. ; Stutzman, M.L. ; Suleiman, R. ; Surles-Law, K.
Author_Institution :
Jefferson Lab, Newport
Abstract :
Users receive very high beam polarization from reliable GaAs photoelectron guns at facilities worldwide. Satisfaction with beam quality (and a number of lab closures) has reduced the level of polarized source R&D from the heyday of 1990s. However, new experiments and new accelerators proposals including high current unpolarized machines, require GaAs photoguns with capabilities that exceed today´s state of the art. This submission describes the capabilities of today´s high- polarization DC high voltage GaAs photoguns and discusses issues that must be addressed to meet new demands.
Keywords :
III-V semiconductors; beam handling techniques; electron accelerators; electron guns; electron sources; gallium arsenide; linear accelerators; polarisation; GaAs; accelerator applications; accelerator-based polarized electron sources; gallium arsenide photoelectron guns; high beam polarization; high current unpolarized machines; Cathodes; Colliding beam accelerators; Electron beams; Gallium arsenide; Guns; Hydrogen; Particle beams; Polarization; Research and development; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440108
