Development of high intensity laser-electron photon beams up to 2.9 GeV at the SPring-8 LEPS beamline

N. Muramatsu, Y. Kon, S. Daté, Y. Ohashi, H. Akimune, J. Y. Chen, M. Fujiwara, S. Hasegawa, T. Hotta, T. Ishikawa, T. Iwata, Y. Kato, H. Kohri, T. Matsumura, T. Mibe, Y. Miyachi, Y. Morino, T. Nakano, Y. Nakatsugawa, H. OhkumaT. Ohta, M. Oka, T. Sawada, A. Wakai, K. Yonehara, C. J. Yoon, T. Yorita, M. Yosoi

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


A laser-Compton backscattering beam, which we call a 'Laser-Electron Photon' beam, was upgraded at the LEPS beamline of SPring-8. We accomplished the gains in backscattered photon beam intensities by factors of 1.5-1.8 with the injection of two adjacent laser beams or a higher power laser beam into the storage ring. The maximum energy of the photon beam was also extended from 2.4 GeV to 2.9 GeV with deep-ultraviolet lasers. The upgraded beams have been utilized for hadron photoproduction experiments at the LEPS beamline. Based on the developed methods, we plan the simultaneous injection of four high power laser beams at the LEPS2 beamline, which has been newly constructed at SPring-8. As a simulation result, we expect an order of magnitude higher intensities close to 107 s-1 and 106 s-1 for tagged photons up to 2.4 GeV and 2.9 GeV, respectively.

Original languageEnglish
Pages (from-to)184-194
Number of pages11
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2014 Feb 11


  • Electron storage ring
  • Hadron photoproduction experiment
  • High energy photons
  • High intensity beam
  • Laser-Compton backscattering


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