2 papers

title:	Photoinjector design for the LCLS
format:	conference procceeding
conference:	23rd International Free Electron Laser Conference
year:	2002
16 authors:	Bolton, P. R. | Clendenin, J. E. | Dowell, D. H. | M. Ferrario | Fisher, A. S. | Gierman, S. M. | Kirby, R. E. | P. Krejcik | Limborg, C. G. | Mulhollan, G. A. | D. Nguyen | D. T. Palmer | J. B. Rosenzweig | Schmerge, J. F. | L. Serafini | X. J. Wang
abstract:	The design of the Linac Coherent Light Source assumes that a low-emittance, 1 nC, 10 ps beam will be available for injection into the 15 GeV linac. The proposed RF photocathode injector that will meet this requirement is based on a 1.6-cell S-band RF gun equipped with an emittance-compensating solenoid. The booster accelerator with a gradient of 25 MV/m is positioned at the beam waist coinciding with the first emittance maximum, i.e., the "new working point." The UV pulses required for cathode excitation will be generated by tripling the output of a Ti:sapphire laser system. Details of the design and the supporting simulations are presented. (12 References).
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title:	Start-to-end simulation for the LCLS X-ray FEL
format:	conference procceeding
conference:	2001 Particle Accelerator Conference
year:	2001
5 authors:	S. Reiche | C. Pellegrini | J. B. Rosenzweig | P. Emma | P. Krejcik
abstract:	X-ray FELs, such as the LCLS and TESLA FEL, require electron beams with large peak current and very small emittance. The X-ray peak power, temporal and spectral properties, depend significantly on details of the electron beam phase space distribution. The electron beam distribution is determined by many effects, as the emission process at the gun photo-cathode, bunch compression, acceleration and wakefields within the undulator. Although analytical results can give an estimate of the expected performance, the complexity of the electron beam generation, acceleration and compression can only be evaluated using a numerical simulation of all these processes, a start-to-end simulation. In this presentation we discuss the LCLS X-Ray FEL performance estimated by a start-to-end simulation, and we compare the results with those obtained using a simpler model. (19 References).
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