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Journal of Radioanalytical and Nuclear Chemistry

, Volume 305, Issue 3, pp 859–864 | Cite as

Analyses and the effect of impurities contained in charge stripper foils for the 3-GeV RCS of J-PARC

  • Y. Yamazaki
  • M. Yoshimoto
  • P. K. Saha
  • M. Kinsho
  • T. Taguchi
  • S. Yamamoto
  • I. Sugai
Article

Abstract

In J-PARC, the 3 GeV rapid cycling synchrotron (RCS) applied hybrid type thick boron-doped carbon (HBC) foils as charge stripper in the multi-turn injection. Although HBC foils have successfully operated to provide a high-power beam for experimental users since the operation of the accelerator started, the deformation and radio-activation of the foils occurred as serious problems. We investigated the cause of the problems, as result we found that impurities in the foil led to these phenomena. In this report, we describe why impurities were mixed in the foil, and which kinds of impurities were found by various methods of analysis. The effect of impurities is also discussed.

Keywords

Stripper foil Impurities High power proton beam J-PARC 

Notes

Acknowledgments

The various analyses of the HBC foils where made by different colleagues in JAEA. We give our special thanks to Dr. T. Ueno for the analysis of the ICP-AES, Dr. K. Kondo for the analysis of SEM–EDS, Dr. A. Miyashita for the analysis of XPS, and Dr. T. Sato for the analysis of PIXE.

References

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Y. Yamazaki
    • 1
  • M. Yoshimoto
    • 1
  • P. K. Saha
    • 1
  • M. Kinsho
    • 1
  • T. Taguchi
    • 2
  • S. Yamamoto
    • 3
  • I. Sugai
    • 4
  1. 1.J-PARCJapan Atomic Energy AgencyNaka-gunJapan
  2. 2.Quantum Beam Science DirectorateJapan Atomic Energy AgencyNaka-gunJapan
  3. 3.Quantum Beam Science DirectorateJapan Atomic Energy AgencyTakasakiJapan
  4. 4.High Energy Accelerator Research Organization/KEKTshukubaJapan

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