臨界プラズマ試験装置(JT-60)のリークテスト技術  [in Japanese] Vacuum Leak Test Techique of JT-60  [in Japanese]

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Abstract

Since a vacuum vessel of JT-60 is very large (167 m<SUP>3</SUP>) and is combined with many components, such as magnetic coils, neutral beam injection systems and RF heating systems, etc., the position of leak testing exceeds 700. The two kind of techniques for vacuum leak test used in JT-60 has been described. Firstly the probe helium gas can be fed remotely in the three-dimensionnally sectioned 54 regions of the JT-60 torus. The leak test was very rapidly performed by using this method. Secondly the helium detector system has been modified by the additional installation of the cryopump, which reduced the background level of the deuterium gas. The sensitivity of vacuum leak test with the cryopump was two orders of magnitude larger than that of without it.<BR>The examples of the performed vacuum leak test are stated. The vacuum leaks during experiments were 9 times. They were caused by thermal strain and plasma discharge. The vacuum leaks just after maintenance are 36 times which mainly caused by mis-installation.

Journal

  • Shinku

    Shinku 41(10), 846-850, 1998-10-20

    The Vacuum Society of Japan

References:  3

  • <no title>

    神永敦嗣

    第14回技術研究会報告, 1993

    Cited by (1)

  • <no title>

    神永敦嗣

    平成9年度核融合科学研究所技術研究会予稿集, 1997

    Cited by (1)

  • <no title>

    HORIIKE H.

    J. Fusion Eng. Des. 16, 285, 1991

    DOI  Cited by (4)

Codes

  • NII Article ID (NAID)
    10001960717
  • NII NACSIS-CAT ID (NCID)
    AN00119871
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    05598516
  • NDL Article ID
    4593054
  • NDL Source Classification
    ZN15(科学技術--機械工学・工業--流体機械)
  • NDL Call No.
    Z16-474
  • Data Source
    CJP  NDL  J-STAGE 
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