MeV- and sub-MeV-photon sources based on Compton backscattering at SPring-8 and KPSI-JAEA

Kawase, Keigo; Kando, Masaki; Hayakawa, Takehito; Daito, Izuru; Kondo, Shuji; Homma, Takayuki; Kameshima, Takashi; Kotaki, Hideyuki; Chen, L.*; Fukuda, Yuji; Faenov, A. Y.; Shizuma, Toshiyuki; Bulanov, S. V.; Kimura, Toyoaki*; Tajima, Toshiki; Shoji, Masazumi*; Suzuki, Shinsuke*; Tamura, Kazuhiro*; Okuma, Haruo*; Arimoto, Yasushi*; Yorita, Tetsuhiko*; Fujiwara, Mamoru; Okajima, Shigeki*

We constructed MeV- and sub-MeV-photon sources by means of Compton backscattering with a laser light and an electron beam at SPring-8 and KPSI-JAEA. MeV-photon source consists of a continuous-wave optically-pumped far infrared laser and an 8-GeV stored electron beam. Sub-MeV-photon source consists of a Nd:YAG pulse-laser and an 150-MeV electron beam accelerated by a microtron. Both source have been succeeded backscattered photon generation. In this talk, I will present characteristics and future prospects of these photon sources.