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We performed a photon generation experiment by laser-Compton scattering at the KEK-ATF, aiming to develop a Compton based polarized positron source for linear colliders. In the experiment, laser pulses with a 357MHz repetition rate were accumulated and their power was enhanced by up to 250 times in the Fabry–Perot optical resonant cavity. We succeeded in synchronizing the laser pulses and colliding...
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