Backward Compton scattering of picosecond CO{sub}2 laser pulses using relativistic electron beam for the bright x-ray generation

摘要

Laser-Compton scattering can generate X-rays or γ-rays with high brightness by applying high-peak-power laser pulses to relativistic electron bunches. We have proposed laser-Compton scattering to generate polarized γ-rays which can inducepair-creation to produce polarized positrons for JLC (Japan Linear Collider) project[1]. As a photon source of the Compton scattering, a picosecond CO{sub}2 laser system is going to be applied for our experiment because of the higher scattering crosssection than near-infrared solid-state lasers, laser power scalability, the laser efficiency and the possibility of high-repetition rated operation. Not only for the JLC positrons source, Compton scattering with CO{sub}2-laser has a possibility to be acompact high intensity X-ray source as an alternative of synchrotron radiation source[2]