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Progress of beam commissioning and beam loss mitigation in the J-PARC linac after the Tohoku earthquake

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Abstract

The Tohoku earthquake in March 2011 caused significant damage to the Japan Proton Accelerator Research Complex (J-PARC) linac and forced us to shutdown the accelerator for nearly nine months. After a significant effort for its restoration, we resumed beam operation of the J-PARC linac in December 2011. Since the resumption of beam operation, we have been suffering from beam-losses which were not observed before the earthquake. Tackling the beam-loss issues, we have finally reached the same beam power for user operation as before the earthquake. In this paper, we present our experience with the beam start-up tuning after the earthquake, with emphasis on beam-loss mitigation efforts.

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Author notes

  1. Tomofumi Maruta

    Present address: J-PARC center, High Energy Accelerator Research Organization, Tokai-mura, 319-1195, Japan

Authors and Affiliations

  1. J-PARC center, Japan Atomic Energy Agency, Tokai-mura, 319-1195, Japan

    Tomofumi Maruta, Akihiko Miura, Hiroyuki Sako & Jun Tamura

  2. J-PARC center, High Energy Accelerator Research Organization, Tokai-mura, 319-1195, Japan

    Masanori Ikegami, Kenta Futatsukawa, Zhigao Fang, Tomoaki Miyao & Yong Liu

Authors
  1. Tomofumi Maruta
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  2. Akihiko Miura
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  3. Hiroyuki Sako
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  4. Jun Tamura
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  5. Masanori Ikegami
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  6. Kenta Futatsukawa
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  7. Zhigao Fang
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  8. Tomoaki Miyao
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  9. Yong Liu
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Corresponding author

Correspondence to Tomofumi Maruta.

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Maruta, T., Miura, A., Sako, H. et al. Progress of beam commissioning and beam loss mitigation in the J-PARC linac after the Tohoku earthquake. Journal of the Korean Physical Society 63, 1274–1279 (2013). https://doi.org/10.3938/jkps.63.1274

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  • DOI: https://doi.org/10.3938/jkps.63.1274

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