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Feedback Control Modeling of Plasma Position and Current during Intense Heating in ISX-B

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3 Author(s)

The ISX-B tokamak at ORNL is designed to have 1.8 MW (and eventually 3 MW) of neutral beam power injected to heat the plasma. This power may raise the ß¿ of the plasna to over 5 percent in less than 50 ms, if the plasma is MHD stable. The results of a numerical simulation of the feedback control system and poloidal coil power supplies necessary to control the resulting noncircular (D-shaped or elliptical) plasma are presented. The resulting feedback control system is shown to be straightforward, although nonlinear voltage-current dependence is assumed in the power supplies. The required power supplied to the poloidal coils in order to contain the plasma under the high heating rates is estimated.

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Plasma Science, IEEE Transactions on  (Volume:7 ,  Issue: 4 )