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- W1986180358 abstract "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 ms, every 1.39 ms 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 feed-forward term which is in proportion to the plasma current. The experimental results in a quasi-constant phase of plasma current are in good agreement with the stability analysis of the control system by using the so-called Bode-diagram which is calculated on the assumption that the plasma current is independent of time. By this control system, the horizontal plasma displacement has been suppressed within 1 cm of 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." @default.
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- W1986180358 date "1980-12-01" @default.
- W1986180358 modified "2023-09-27" @default.
- W1986180358 title "Control of Horizontal Plasma Position by Feedforward-Feedback System with Digital Computer in the JIPP T-II Tokamak" @default.
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- W1986180358 doi "https://doi.org/10.1143/jjap.19.2457" @default.
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