Experiment on STP, an Axisymmetric Fast Toroidal Pinch with Very Small Aspect Ratio

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概要

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• A high β fat tokamak configuration operated under a small q value is tested. The maximum ion and electron temperatures are 500 and 100ev, respectively, while a plasma density about 1×10^<15>/cm^3 is observed. A violent toroidal drift appears after the pinch implosion and a large amount of the plasma energy is lost within 10 μsec. However, application of pulsed vertical field of about 480 G dramatically changes this situation. The movable magnetic probe measurements show that, with the vertical field, the plasma pressure at 17.6 usec after the start of the main discharge is 3×10^<17>eV/cm^3,whereas, it becomes very small when the field is not excited. Large signals of m=2 mode appear when the B_P signal of eight pick-up loops around the minor circumference of the torus is transformed into Fourier components. The m=2 mode becoms small when the high β operation with negative bias field is done. It is also observed the sine component of m=1 mode appears when the q value is increased to 2 from 1.3. These phenomena can be explained qualitatively by the theory of Freidberg and Haas.

• 核融合科学研究所の論文

著者

• Wakatani Masahiro

  Research Information Center, Institute of Plasma Physics, Nagoya University

• Wakatani Masahiro

  Research Information Center Institute Of Plasma Physics Nagoya University:department Of Electronic E

• Mimura Mikio

  Research Institute For Atomic Energy Osaka City University

• Kita Yoshio

  Research Information Center Institute Of Plasma Physics Nagoya University

• Kitagawa Shiro

  Research Information Center Institute Of Plasma Physics Nagoya University

• HIRANO Kei-ichi

  Research Information Center, Institute of Plasma Physics, Nagoya University

• OHI Masakazu

  Research Information Center, Institute of Plasma Physics, Nagoya University

• AMANO Tuneo

  Research Information Center, Institute of Plasma Physics, Nagoya University

• Amano Tuneo

  Research Information Center Institute Of Plasma Physics Nagoya University:plasma Physics Laboratory

• Ohi Masakazu

  Research Information Center Institute Of Plasma Physics Nagoya University:plasma Physics Laboratory

• Mimura Mikio

  Research Information Center Institute Of Plasma Physics Nagoya University

• Hirano Kei-ichi

  Research Information Center Institute Of Plasma Physics Nagoya University

• Wakatani Masahiro

  Research Information Center Institute Of Plasma Physics Nagoya University:japan Atomic Energy Resear

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• Damping of Radial Oscillation of A Toroidal Pinch Plasma
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