Two Dimensional Li Beam Imaging to Study the Magnetic Field Configuration Effects on Plasma Confinement in Spherical Tokamak CPD

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概要

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• Two dimensional lithium beam imaging technique has been applied in the spherical tokamak, CPD (Compact Plasma wall interaction experimental Device), to study the effects of various magnetic field configurations on RF plasma confinement topology. The performance of the lithium sheet beam is absolutely calibrated by a quartz crystal monitor. Experimental results show that plasma initiation takes place at the electron cyclotron resonance layer in a simple torus configuration and then it expands quickly to the low magnetic field side. Different magnetic field configurations critically affect the RF plasma confinement topology. A sharp lower boundary exists for the RF plasma in magnetic null configuration. Magnetic connection length plays the key role in defining plasma boundary and the critical value of connection length for plasma to exist in CPD is found to be ∼ 5-6 meter for a given pressure condition.

著者

• Bhattacharyay R.

  Interdisciplinary Grad. Sch. Of Eng. Sci. Kyushu University

• Morisaki T.

  National Institute for Fusion Science

• Sato K.

  Research Information Center Institute Of Plasma Physics Nagoya University

• Sakamoto M.

  Research Information Center, Institute of Plasma Physics, Nagoya University

• Nakamura K.

  Research Institute for Applied Mechanics Kyushu University

• XU H.

  International Nature Farming Research Center

• Hasegawa M.

  Research Information Center, Institute of Plasma Physics, Nagoya University

• Kawasaki S.

  Research Institute for Applied Mechanics, Kyushu University

• MORISAKI T.

  National Institute for Fusion Science, Toki 509-5292, Japan

• ZUSHI H.

  Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• KIKUKAWA K.

  Interdisciplinary Graduate school of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• WATANABE S.

  Interdisciplinary Graduate school of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• INADA Y.

  Interdisciplinary Graduate school of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• TSUCHIYA H.

  Graduate Universty for Advanced Studies, National Institute for Fusion Science, Toki 509-5292, Japan

• IDEI H.

  Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• SASAKI K.

  Interdisciplinary Graduate school of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• WANG F.

  Interdisciplinary Graduate school of Engineering Science, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• NAKASHIMA H.

  Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• HIGASHIJIMA A.

  Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

• SATO K.

  Research Institute of Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

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