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Sei, N.

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MOOAC02 A Short-Pulse Hard X-ray Source with Compact Electron LINAC Via Laser-Compton Scattering for Medical and Industrial Radiography 121
  • H. Toyokawa, H. Ikeura-Sekiguchi, M. K. Koike, R. Kuroda, H. Ogawa, N. Sei, M. Tanaka, K. Y. Yamada, M. Y. Yasumoto
    AIST, Tsukuba, Ibaraki
  • T. Nakajyo, F. Sakai, T. Y. Yanagida
    SHI, Tokyo
  An intense, quasi-monochromatic hard X-ray beam has been generated via the laser-Compton scattering of a picosecond electron bunch with an intense femtosecond TW laser. A s-band linear accelerator of 40 MeV and Ti:Sa femtosecond TW laser were used to generate X-rays. We plan to increase the X-ray yield up to two-orders than the current one until FY2008. Our recent R&D for that purpose are generation of multi-pulse electron beam using a photo-cathode rf-gun, and multi-pulse laser cavity for Compton scattering. We briefly describe the specifications of the electron accelerator and the laser systems, together with the developments and modifications being undergone.  
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TUPMN051 Development of Photocathode RF Gun and Laser System for Multi-collision Laser Compton Scattering 1037
  • R. Kuroda, M. K. Koike, H. Ogawa, N. Sei, H. Toyokawa, K. Y. Yamada, M. Y. Yasumoto
    AIST, Tsukuba, Ibaraki
  • T. Gowa, Y. Kamiya, A. Masuda, R. Moriyama, K. Sakaue, M. Washio
    RISE, Tokyo
  • S. Kashiwagi
    ISIR, Osaka
  • T. Nakajyo, F. Sakai, T. Y. Yanagida
    SHI, Tokyo
  A compact soft and hard X-ray source via laser Compton scattering is required for biological, medical and industrial science because it has many benefits about generated X-rays such as short pulse, quasi-monochromatic, energy tunability and good directivity. Our X-ray source is conventionally the single collision system between an electron pulse and a laser pulse. To increase X-ray yield, we have developed a multi-collision system with a multi-bunch electron beam and a laser optical cavity. The multi-bunch beam will be generated from a Cs-Te photocathode rf gun sytem using a multi-pulse UV laser. The laser optical cavity will be built like the regenerative amplification including a collision point between the electron pulse and the laser pulse to enhance the laser peak power per 1 collision on laser Compton scattering. In this conference, we will describe the results of preliminary experiments for the multi-collision system and future plans.