臨界プラズマ試験装置(JT-60)のベーキング技術  [in Japanese] Baking Technique of JT-60  [in Japanese]

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Author(s)

    • 新井 貴 ARAI Takashi
    • 日本原子力研究所那珂研究所 Department of Fusion Facilities Naka Fusion Research Estabishment Japan Atomic Energy Research Institute
    • 正木 圭 MASAKI Kei
    • 日本原子力研究所那珂研究所 Department of Fusion Facilities Naka Fusion Research Estabishment Japan Atomic Energy Research Institute
    • 宮地 謙吾 MIYACHI Kengo
    • 日本原子力研究所那珂研究所 Department of Fusion Facilities Naka Fusion Research Estabishment Japan Atomic Energy Research Institute

Abstract

It needs to make low ultimate pressure to decrease impurities in a plasma in a nuclear fusion device. Baking technique is very effective method to decrease outgassing rate from first walls and inner surface of the vacuum vessel. However, in such large vacuum vessel, e.g. JT-60, the non-uniform heating and the deformation due to thermal expansion might be very important problems. The baking technique of JT-60 is described. Two baking systems were applied to JT-60 to solve the problem of non-uniform heating. One is a circulation system of the hot nitrogen gas which is located between the inner and outer skins of the double-skin structured vacuum vessel. The other is an electric heater which apply the thick of the vessel. In order to prevent the deformation, the difference of temperature was as small as possible. By both the baking at 300°C and the conditioning such as discharge cleaning, the ultimate pressure was achieved 7.9 × 10<SUP>-7</SUP> Pa.

Journal

  • Shinku

    Shinku 41(10), 841-845, 1998-10-20

    The Vacuum Society of Japan

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    DOI  Cited by (4)

  • Divertor Modification in JT-60U  [in Japanese]

    HOSOGANE Nobuyuki

    Journal of plasma and fusion research 73(6), 564-569, 1997-06-25

    NDL Digital Collections  References (17) Cited by (2)

Codes

  • NII Article ID (NAID)
    10001960710
  • NII NACSIS-CAT ID (NCID)
    AN00119871
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    05598516
  • NDL Article ID
    4593053
  • 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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