Title :
Physics of JLAB FEL injector [Jefferson Laboratory]
Author_Institution :
Thomass Jefferson Nat. Accel. Facility, Newport News, VA, USA
Abstract :
Jefferson Laboratory is currently commissioning a high-power kW-level cw IR FEL which recently demonstrated impressive high-power capability with the linac operating in a nonrecirculating mode. The injector, which provides a 10 MeV electron beam with high bunch charge (60-135 pC) to the linac, consists of a 350 kV dc photocathode gun and two 5-cell superconducting RF cavities, along with a buncher cavity. Due to the nonrelativistic nature of the electron beam at 350 keV there is some interesting physics involved in the β=1 SRF cavities during acceleration. This is discussed, as is the usual space-charge-originated emittance degradation at various injector components
Keywords :
accelerator RF systems; accelerator cavities; free electron lasers; particle beam injection; photocathodes; superconducting cavity resonators; 10 MeV; 350 kV; FEL injector; IR FEL; Jefferson Laboratory; buncher cavity; emittance; injector; photocathode gun; superconducting RF cavities; Acceleration; Cathodes; Degradation; Electron beams; Laboratories; Linear particle accelerator; Particle beam injection; Physics; Solenoids; Space charge;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792722
