Fiber-Based, Spatially and Temporally Shaped Picosecond UV Laser for Advanced RF Gun Applications
ORAL
Abstract
The UV laser system has been specifically designed for advanced rf gun applications, with a special emphasis on the production of high-brightness electron beams for free-electron lasers and Compton scattering light sources. The laser pulse can be shaped to a flat-top in both space and time with a duration of 10 ps FWHM, rise and fall times under 1 ps, and pulse energy of 50 micro-joules at 261.75 nm. A fiber oscillator and amplifier system generates a chirped pump pulse at 1047 nm; stretching is achieved in a chirped fiber Bragg grating; recompression to 1 ps FWHM is achieved with a single multi-layer dielectric grating based compressor. A two stage harmonic converter frequency quadruples the beam. Temporal shaping is accomplished with a Michelson-based ultrafast pulse stacking device with nearly 100{\%} throughput.
*This work was performed under auspices of the U.S. Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract W-7504-Eng-48.
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