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Journal of Instrumentation 7 (2012) P01021
Production of gamma rays by pulsed laser beam Compton scattering off GeV-electrons using a non-planar four-mirror optical cavity
T. Akagi1, S. Araki2, J. Bonis3, I. Chaikovska3, R. Chiche3, R. Cizeron3, M. Cohen3, E. Cormier4, P. Cornebise3, N. Delerue3, R. Flaminio5, S. Funahashi2, D. Jehanno3, Y. Honda2, F. Labaye3, M. Lacroix3, R. Marie3, S. Miyoshi, S. Nagata, T. Omori2, Y. Peinaud3, L. Pinard5, H. Shimizu2, V. Soskov3, T. Takahashi, R. Tanaka, T. Terunuma2, J. Urakawa2, A. Variola3, F. Zomer3

As part of the positron source R&D for future $e^+-e^-$ colliders and Compton based compact light sources, a high finesse non-planar four-mirror Fabry-Perot cavity has recently been installed at the ATF (KEK, Tsukuba, Japan). The first measurements of the gamma ray flux produced with a such cavity using a pulsed laser is presented here. We demonstrate the production of a flux of 2.7 $\pm$ 0.2 gamma rays per bunch crossing ($\sim3\times10^6$ gammas per second) during the commissioning.
1 :  Graduate School of Advanced Sciences of Matter, Hiroshima University
2 :  KEK - High Energy Accelerator Research Organization
3 :  LAL - Laboratoire de l'Accélérateur Linéaire
4 :  CELIA - Centre d'Etudes Lasers Intenses et Applications
5 :  LMA - Laboratoire des matériaux avancés
Physique/Physique/Physique des accélérateurs
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