Experimental Studies of Photocathode Rf Gun with Laser Pulse Shaping
نویسندگان
چکیده
A technique of laser pulse shaping was developed for low-emittance electron beam generation in a photocathode RF gun. The emittance growth due to space charge and RF effects in the RF gun was experimentally investigated with square and gaussian temporal laser pulse shapes. It is found that the square pulse shaping is a useful tool for both the reduction of nonlinear space charge force and the correction of the linear space charge effect. An optimal normalized rms emittance of 1.2 πmmmrad at 1 nC was obtained by a square temporal laser pulse shape with pulse length of 9 ps FWHM.
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