Transverse emittance measurements on an S-band photoinjector rf electron gun

Details Transverse emittance measurements on an S-band photoinjector rf electron gun Transverse emittance measurements on an S-band photoinjector rf electron gun

2001-11-03

arxiv.org/abs/physics/0111010v1

Nucl.Instrum.Meth. A483 (2002) 301-304

Physics

Accelerator Physics

12 pages, 4 figures, contributed to The 23rd Int. FEL Conf., Darmstadt, 20-24 Aug. 2001

Scientific paper

10.1016/S0168-9002(02)00332-7

Proposed fourth generation light sources using SASE FELs to generate short pulse, coherent, X-rays require demonstration of high brightness electron sources. The Gun Test Facility (GTF) at SLAC was built to test high brightness sources for the proposed Linac Coherent Light Source at SLAC. The transverse emittance measurements are made at nearly 30 MeV by measuring the spot size on a YAG screen using the quadrupole scan technique. The emittance was measured to vary from 1 to 3.5 mm-mrad as the charge is increased from 50 to 350 pC using a laser pulse width of 2 ps FWHM. The measurements are in good agreement with simulation results using the LANL version of PARMELA.

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