Merging Startup Experiments on the UTST Spherical Tokamak

• YAMADA Takuma

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• IMAZAWA Ryota

  Graduate School of Engineering, The University of Tokyo, Bunkyo 113-8656, Japan

• KAMIO Shuji

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• HIHARA Ryuma

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• ABE Keita

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• SAKUMURA Morio

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• CAO Qinghong

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• OOSAKO Takuya

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• KOBAYASHI Hiroaki

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• WAKATSUKI Takuma

  Graduate School of Science, The University of Tokyo, Bunkyo 113-0033, Japan

• AN Byungil

  Graduate School of Science, The University of Tokyo, Bunkyo 113-0033, Japan

• NAGASHIMA Yoshihiko

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• SAKAKITA Hajime

  National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan

• KOGUCHI Haruhisa

  National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan

• KIYAMA Satoru

  National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan

• HIRANO Yoichi

  National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan

• INOMOTO Michiaki

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• EJIRI Akira

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• TAKASE Yuichi

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

• ONO Yasushi

  Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

抄録

The University of Tokyo Spherical Tokamak (UTST) was constructed to explore the formation of ultrahigh-beta spherical tokamak (ST) plasmas using double null plasma merging. The main feature of the UTST is that the poloidal field coils are located outside the vacuum vessel to demonstrate startup in a reactor-relevant situation. Initial operations used partially completed power supplies to investigate the appropriate conditions for plasma merging. The plasma current of the merged ST reached 100 kA when the central solenoid coil was used to assist plasma formation. Merging of two ST plasmas through magnetic reconnection was successfully observed using two-dimensional pickup coil arrays, which directly measure the toroidal and axial magnetic fields inside the UTST vacuum vessel. The resistivity of the current sheet was found to be anomalously high during merging.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 5 S2100-S2100, 2010

  一般社団法人 プラズマ・核融合学会

キーワード

• spherical tokamak
• merging startup
• magnetic reconnection

詳細情報

• CRID: 1390001205253386496
• NII論文ID: 130000669090
• DOI: 10.1585/pfr.5.s2100
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/5/0/5_0_S2100/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可