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

✍ Scribed by K. Kawase; Y. Arimoto; M. Fujiwara; S. Okajima; M. Shoji; S. Suzuki; K. Tamura; T. Yorita; H. Ohkuma

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 620 KB
• Volume: 592
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2008.04.008

✦ Synopsis

A test experimental line at SPring-8 has been constructed for the generation of backward Compton scattered (BCS) g-rays 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 ðCO 2 Þ laser. The FIR laser output power achieved is 1.6 W at maximum for 118:8 mm lasing; this value is the highest in the case of this type of laser. As a result of the direct measurement, the generated BCS g-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.