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TY - CONF AU - Endo, A. AU - Chyla, M. AU - Miura, T. AU - Mocek, T. AU - Sakaue, K. AU - Sikocinski, P. AU - Washio, M. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Cryogenically Cooled 1J, ps Yb:YAG Slab Laser for High-brightness Laser-Compton X-Ray Source J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Laser Compton X-ray source is studied as an accelerator-laser hybrid technology to realize a compact source from soft X-ray to gamma ray*. It is critical to design a solid state laser of 1J pulse energy with 1ps pulse length, and a high beam quality for 10 microμm diameter interaction. The required M2 is less than 1.5 in a standard normal incidence configuration. X-ray total photon number is ~10⁹ with 1nC, 3ps 43MeV electron bunch for each shot. HiLASE project is committed to make a progress in the field of new generation solid state laser based on Yb-doped materials, to deliver 1J at 120Hz of 1-2ps with M2<1.5. The laser system consists of a seed fiber laser and two amplifier stages, an Yb:YAG thin disk regenerative amplifier, and a cryogenically cooled single slab booster amplifier. We have obtained output energy of 45mJ from the regenerative amplifier at 1 kHz with M2 <1.2. Booster amplifier is designed by a conduction cooling to build a compact system. Gain bandwidth was 1.2nm at 120K, enough to obtain 1-2ps pulses. Improvement of the crystal holder and the experimental results are presented to indicate the available pulse energy and M2. PB - JACoW CP - Geneva, Switzerland SP - 2056 EP - 2058 KW - laser KW - photon KW - electron KW - booster KW - operation DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRO050 UR - http://jacow.org/ipac2014/papers/wepro050.pdf ER -