PROBLEM TO BE SOLVED: To obtain laser Compton light with a high monochromaticity.;SOLUTION: An electron pulse 12 that passed through a deflection cavity 13 passes a linear accelerator 14. The electron pulse 12 receives high-frequency acceleration to become a high-energy electron pulse 15, in the linear accelerator 14. A laser beam source 16 generates a pulse-like laser beam 17 that is visible light or near infrared light. Setting is performed so that the laser beam 17 is reflected on a reflection mirror 18 and collided with the high-energy electron pulse 15 at a collision point 19. Laser Compton light 20, that is high-energy light (an X ray, a gamma ray, and the like), is generated from the collision point 19. Setting is performed so that an inclination angle to the travelling direction is given to the electron pulse 12 by the deflection cavity 13, and the inclination angle becomes larger at the collision point 19.;COPYRIGHT: (C)2012,JPO&INPIT
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