<RESEARCH REPORT>Magnetohydrodynamic Equilibrium and Stability of Spheromak by Boundary-Fitted Curvilinear Coordinate System : Improvement of Plasma Confinement by External Coil

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概要

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• The flux conserver actually used in spheromak experiments has an entrance hole and a duct to introduce a plasma into it. The effect of the hole keeps some magnetic surfaces from closing in the flux conserver. A method of closing all surfaces is to place an external coil near the entrance hole and apply an electric current I_c whose direction is opposite to the plasma current I_p. Equilibrium configurations of the spheromak plasma in the flux conserver with the external coil are determined by using the boundary-fitted curvilinear coordinate system. The stability of these configurations are investigated by using the Mercier criterion. The results of computations show the plasma confinement is poor if I_c/I_p≈0,but it is considerably improved if I_c/I_p≳1/2 is satisfied.

• 核融合科学研究所の論文

著者

• UYAMA Tadao

  Department of Electrical Engineering,Faculty of Engineering,Himeji Institute of University

• KAMITANI Atsushi

  Department of Electrical and Information Engineering,Faculty of Engineering,Yamagata University

• KANEKO Shobu

  Department of Applied Physics,Faculty of Engineering The University of Tokyo

• Uyama Tadao

  Department Of Electrical Engineering Faculty Of Engineering Himeji Institute Of Technology

• Kaneko S

  Univ. Tokyo

• Kaneko Shobu

  Department Of Applied Physics Faculty Of Engineering The University Of Tokyo

• WATANABE Kenji

  Course of Electromagnetic Energy Engineering,Osaka University

• Kamitani Atsushi

  Department Of Applied Physics Faculty Of Engineering The University Of Tokyo

• Watanabe Kenji

  Course Of Electomagnetic Energy Engineering Faculty Of Engineering Osaka University

• UYAMA Tadao

  Department of Electrical Engineering, Faculty of Engineering, Himeji Institute of Technology

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