Title :
LCLS LLRF Upgrades to the SLAC linac
Author :
Akre, R. ; Dowell, D. ; Emma, P. ; Frisch, J. ; Hong, B. ; Kotturi, K. ; Krejcik, P. ; Wu, J. ; Byrd, J.
Author_Institution :
SLAC, Menlo Park
Abstract :
The Linac Coherent Light Source (LCLS) at SLAC will be the brightest X-ray laser in the world when it comes on line. In order to achieve the brightness a 200fS length electron bunch is passed through an undulator. To create the 200fS, 3kA bunch, a 10pS electron bunch, created from a photo cathode in an RF gun, is run off crest on the RF to set up a position to energy correlation. The bunch is then compressed by chicanes. The stability of the RF system is critical in setting up the position to energy correlation. Specifications derived from simulations require the RF system to be stable to below 200fS in several critical injector stations and the last kilometer of linac. The SLAC linac RF system is being upgraded to meet these requirements.
Keywords :
X-ray apparatus; accelerator RF systems; electron accelerators; electron guns; linear accelerators; particle beam bunching; particle beam injection; photocathodes; wigglers; RF gun; RF system; X-ray laser; chicanes; critical injector stations; electron bunch; linac coherent light source; photocathode; undulator; Acceleration; Electrons; Jitter; Klystrons; Linear particle accelerator; Particle beams; Phase measurement; Radio frequency; Stability; X-ray lasers;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441270
