MeV -ray generation from backward Compton scattering at SPring-8

Kawase, Keigo; Arimoto, Yasushi*; Fujiwara, Mamoru; Okajima, Shigeki*; Shoji, Masazumi*; Suzuki, Shinsuke*; Tamura, Kazuhiro*; Yorita, Tetsuhiko*; Okuma, Haruo*

A test experimental line at SPring-8 has been constructed for the generation of backward Compton scattered (BCS) -ray by head-on collision between an 8 GeV electron beam and a far-infrared (FIR) laser. For the FIR laser, we use a continuous-wave methanol laser optically pumped by a carbon dioxide ( ${rm CO}_{2}$ ) laser. The FIR laser output power achieved is 1.6 W at maximum for 118.8 m lasing; this value is the highest in the case of this type of laser. As a result of the direct measurement, the generated BCS -ray flux was found to be about $10^{3}$ photons/s. This value is consistent with the estimation calculated by taking into account the input laser power and the transmittance of the laser transport system.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research A
Volume	:	592
Number	:	3
Pages	:	p.154 - 161
Publication Year/Month	:	2008/07
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Paper URL	:	https://doi.org/10.1016/j.nima.2008.04.008
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Registration No. : AA20080062
JAEA Abstracts No. : 36001440
Paper Submission No. : 4730

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