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2000 Fiscal Year Final Research Report Summary

Compact toroid injection method for fueling magnetized high temperature plasmas

Research Project

Project/Area Number 10558070
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section展開研究
Research Field Nuclear fusion studies
Research InstitutionHimeji Institute of Technology

Principal Investigator

UYAMA Tadao  Himeji Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (00093378)

Co-Investigator(Kenkyū-buntansha) 林 隆也  核融合科学研究所, 教授 (60156445)
FUKUMOTO Naoyuki  姫路工業大学, 工学部, 助手 (90275305)
NAGATA Masayoshi  姫路工業大学, 工学部, 助教授 (00192237)
MIYAZAWA Junichi  核融合科学研究所, 助手 (50300728)
YAMADA Hiroshi  核融合科学研究所, 助教授 (20200735)
Project Period (FY) 1998 – 2000
KeywordsCT injection for fueling / Compact Toroid (CT) / Effect on CT injection of external field / Saddle coil / CT-injection-dynamics / CT deceleration due to external field / Plasma shift
Research Abstract

Compact toroid (CT) injection method for fueling a magnetized high temperature plasma has been studied experimentally and theoretically. This method is expected to be one of the advanced fueling methods for central fuelling in a large grade device like fusion reactor. CT injection experiments have been carried out in JFT-2M tokamak at JAERI using HIT-CTI (Himeji Institute of Technology-CT Injector) An increase in the line-average electron density was obtained in the plasmas with toroidal field of 0.8 T in the case of CT injection with velocity of 300 km/s.
We have studied an effect on CT transportation in the drift tube due to an external field, B_<ext> which is crossing perpendicularly to the drift tube in the FACT device at Himeji Institute of Technology. We observed that CT shifted in the direction of -u×B_<ext> (u is CT velocity) when the polarity of inner electrode of plasma gun was negative and in the direction of +u×B_<ext> when the polarity was positive. Moreover, we measured CT was decelerated by B_<ext> and the penetration length into B_<ext> becaome shorter as the strength of B_<ext> increased.
The fuelling process by a CT injection has been investigated by using MHD numerical three dimensional simulations, where CTs are injected into a magnetized plasma region. The results showed that an injected CT into a magnetized target plasma suffered from a tilting instability, which grew with a similar timescale to that of the CT penetration which was accompanied by magnetic reconnection between the CT magnetic field and target magnetic field.

  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 宇山忠男: "コンパクトトーラスの高温プラズマへの入射実験"プラズマ・核融合学会誌. 74. 200-216 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Miyazawa: "Possibility of Profile Control using Compact Toroid Injector on Large Helical Device"Japanese Journal of Applied Physics. 37. 6620-6627 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Ogawa: "Studies of Boundary Plasmas and Fueling on the JFT-2M"Journal of Nuclear Materials. 266-269. 623-628 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福本直之: "コンパクトトロイド入射装置の性能とトカマクプラズマへの入射初期実験"電気学会論文誌A. 119. 1300-1305 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa: "Compact Toroid Injection Experiment in JFT-2M"Nuclear Fusion. 39. 1911-1915 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Suzuki: "Three dimensional simulation study of spheromak injection into magnetized plasmas"Nuclear Fusion. 40. 277-288 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Suzuki: "Deceleration mechanism of spheromak-like compact toroid penetrating into magnetized plasmas"Physics of Plasmas. 7. 5033-5037 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Miyazawa: "Design of spheromak injector using conical accelerator for Large Helical Device"Fusion Engineering and Design. 54. 1-12 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福本直之: "磁場閉じ込め装置での粒子補給システムの現状と課題-コンパクトトーラス(CT)入射-"プラズマ・核融合学会誌. 77. 246-251 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Uyama: "Compact Torus Injection Experiments into High Temperature Plasma"J.of Plasma and Fusion Science. Vol.74. 2000-216 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.Miyazawa: "Possibility of Profile Control using Compact Toroid Injection on Large Helical Device"J J of Applied Physics. Vol.37. 6629-6627 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ogawa: "Studies of Boundary Plasmas and Fueling on the JFT-2M"Journal of Nuclear Materials. Vol.266-269. 623-628 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Fukumoto: "Efficiency of Compact Toroid Injector and CT Injection Experiments into Tokamak Plasma"J.of Plasma and Fusion Science. Vol.74. 200-216 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa: "Compact Toroid Injection Experiment in JFT-2M"Nuclear Fusion. Vol.39. 1911-1915 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Suzuku: "Three dimensional simulation study of spheromak injection into magnetized plasmas"Nuclear Fusion. Vol.40. 277-288 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Suzuki: "Deceleration mechanism of spheromak-like compact toroid penetrating into magnetized plasmas"Physic of Plasmas. Vol.7. 5033-5037 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.Miyazawa: "Design of spheromak injector using conical accelerator for Large Helical Device"Fusion Engineering and Design. Vol.54. 1-12 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ogawa: "Compact toroid injection as fueling in the JET-2M tokamak"Journal of Nuclear Materials. Vol.290-293. 454-458 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Fukumoto: "The present state and problemes of Fueling System by Compact Toroid Injection"J.of Plasma and Fusion Science. Vol.77. 246-251 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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