<RESEARCH REPORT>Control of Horizontal Plasma Position by Feedforward-Feedback System with Digital Computer in the JIPP T-II Tokamak
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概要
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In the resistive shell tokamak, JIPP T-II, the control of horizontal plasma position is successfully carried out by calculating the equilibrium equation of a large-aspect-ratio tokamak plasma surrounded by a thin resistive shell of a skin time of 5.2 msec, every 1.39 msec with a digital computer. The iron core effect is also taken into account by a simple form in the equation. The required strength of vertical field is determined by the control demand composed of two groups; one is a "feedback" term expressed by the deviation of plasma position from the desired one and proportion-integration-differentiation correction (PID-controller), and the other is a "feedforward" term which is in proportion to the plasma current. The experimental results have a good agreement with the stability analysis of the control system by using the so-called Bode-diagram. By this control system, the horizontal displacement has been suppressed within 1 cm from the initiation of discharge to the termination in the high-density and low-q(a) plasma of 15 cm-radius which is obtained by both strong gas puffing and second current rise.
- 核融合科学研究所の論文
著者
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Toi K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Tanaka S.
Biol. Lab. Nippon Med. Schl.
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Sato K.
Research Information Center Institute Of Plasma Physics Nagoya University
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Itoh S.
Research Institute For Applied Mechanics Kyushu University
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Tanahashi S.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Miyamoto K.
Dept. Biol. Fac. Sci. Tokyo Metro. Univ.
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Matsuura K.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Sakurai K.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Sakurai K.
Dept. Biol. Fac. Sci. Tokyo Metro. Univ.
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ITOH S.
Natl. Inst. Basic Biol.
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Sato K.
Research Information Center Institute Of Plasma Physics Nagoya University:tokai University
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Tanahashi S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Itoh S.
Research Information Center Institute Of Plasma Physics Nagoya University:the Institute Of Physical And Chemical Research
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