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Time-interleaved multienergy acceleration for an x-ray free-electron laser facility

Toru Hara1,*, Kenji Tamasaku1, Takao Asaka1, Takahiro Inagaki1, Yuichi Inubushi1, Tetsuo Katayama2, Chikara Kondo1, Hirokazu Maesaka1, Shinichi Matsubara2 et al.

Takashi Ohshima1, Yuji Otake1, Tatsuyuki Sakurai1, Takahiro Sato1,†, Hitoshi Tanaka1, Tadashi Togashi2, Kazuaki Togawa1, Kensuke Tono2, Makina Yabashi1, and Tetsuya Ishikawa1

  • 1RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
  • 2Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan

  • *toru@spring8.or.jp
  • Present address: School of Science, The University of Tokyo.

Phys. Rev. ST Accel. Beams 16, 080701 – Published 15 August, 2013

DOI: https://doi.org/10.1103/PhysRevSTAB.16.080701

Abstract

To meet the demand from the growing number of user experiments, multi-beam-line operation with a wide spectral range is seriously considered in x-ray free-electron laser facilities. In a conventional design, the beam line of low photon energies branches off from the middle of the accelerator to take out low energy electron beams. Here in this paper, a novel method is proposed to deliver bunch-to-bunch energy changed electron beams at the end of the accelerator. Since all accelerator components are operated in steady state, this method enables quasisimultaneous operation of multi-beam-line in the same undulator hall without degrading the stability and performance of the electron beam.

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