Title :
Diagnostics for commissioning LCLS
Author_Institution :
SLAC, Menlo Park
Abstract :
The first stage of commissioning of the Linac Coherent Light Source at SLAC has begun in April of this year with successful transport of the beam from the new RF photoinjector throught to the first bunch compressor. Construction and installation is continuing and will culminate with first FEL light in 2009. The LCLS provides several diagnostic challenges for providing precision, single-pulse readback of beam size and position in order to tune for very low 1 micron emittances. Ultra-short subpicosecond bunches call for special techniques of bunch length measurement including coherent radiation monitoring and the transverse deflecting cavity. The latter is also used to measure time dependant emittance and energy spread of slices along the bunch, which are critical to the lasing process within the FEL.
Keywords :
accelerator RF systems; accelerator cavities; free electron lasers; linear accelerators; particle beam bunching; particle beam injection; radiation monitoring; FEL light; LCLS commissioning; Linac Coherent Light Source; RF photoinjector; SLAC; beam transport; bunch compressor; bunch length measurement; coherent radiation monitoring; lasing process; single-pulse readback; time dependant emittance measurement; transverse deflecting cavity; ultra-short subpicosecond bunches; Energy measurement; Instruments; Length measurement; Light sources; Linear particle accelerator; Radiation monitoring; Radio frequency; Structural beams; Time measurement; USA Councils;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440724
