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Full model based sensor optimization for RWM control

Yueqiang Liu

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A significant improvement of the resistive wall mode (RWM) feedback stabilization is achieved by optimizing the poloidal locations and the linear combination of an array of sensors, detecting the radial magnetic flux. The optimization is based on the full knowledge of the dynamic response of both unstable and stable RWMs. The optimal solution is robust against the variation of plasma parameters.


PACS

52.55.Fa Tokamaks, spherical tokamaks

07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

52.35.Py Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)

28.52.-s Fusion reactors

52.30.Cv Magnetohydrodynamics (including electron magnetohydrodynamics)

Subjects

Nuclear physics

Instrumentation and measurement

Plasma physics

Dates

Issue 11 (November 2009)

Received 13 May 2009, in final form 27 June 2009

Published 28 October 2009



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