Title :
Bnl photo-injector performance optimization
Author :
Chang, X.Y. ; Wang, X.J. ; Ben-Zvi, I.
Author_Institution :
ATF, Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
Extensive simulation studies of the BNL 1.6 cell photoinjector were carried out at the Accelerator Test Facility (ATF) using computer program PARMELA. The transverse emittance of photo-injector was optimized at much lower RF gun phase than earlier studies, which agrees with the longitudinal emittance compensation predictions. The Schottky effect on the emittance and pulse length of photoelectron beam was investigated. Instead of flat longitudinal distribution, simple laser and electron beam longitudinal profile control techniques, such a laser pulse truncation by saturable absorber, or electron beam longitudinal beam profile truncation using energy slit, were used to achieve transverse emittance 1 mm-mrad for a charge of 1 nC
Keywords :
electron beams; electron guns; electron sources; ATF; Accelerator Test Facility; BNL 1.6 cell photoinjector; PARMELA; RF gun; Schottky effect; electron beam longitudinal beam profile truncation; electron beam longitudinal profile control techniques; flat longitudinal distribution; laser pulse truncation; longitudinal emittance compensation predictions; photoelectron beam; saturable absorber; transverse emittance; Computational modeling; Computer simulation; Electron beams; Laser beams; Life estimation; Optical control; Optical pulses; Optimization; Radio frequency; Test facilities;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987348
