Experiment studies on the polarized

Experiment studies on the polarized gamma-rays generation at KEK-ATF

Polarized positrons can be created through electron-positron pair creation from circularly polarized gamma-rays. Laser-Compton scattering is an efficient method to generate circularly polarized gamma-rays. A high finesse 2-mirror optical stacking cavity had been installed on the straight section of the electron storage ring at KEK-ATF. A 1064 nm circularly polarized pulsed laser beam was stacked in the cavity. Polarized gamma-rays with a maximum energy of 28.3 MeV were produced via inverse Compton scattering of the enhanced laser pulse off an electron beam of 1.28 GeV. The number of generated gamma photons per collision was estimated by a photon detector. It was found that the experimental result was in agreement with the simulated value.

作 者： LI Xiao-Ping PEI Guo-Xi   作者单位： LI Xiao-Ping(Institute of High Energy Physics, CAS, Beijing 100049, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

PEI Guo-Xi(Institute of High Energy Physics, CAS, Beijing 100049, China) 

刊 名： 中国物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2009 33(8)  分类号： O4  关键词： polarized gamma-rays   Compton scattering   optical stacking cavity  

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