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State Feedback for Control of Multimode Plasma Instabilities

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1 Author(s)

Using the concet of " normal mode states" of a plasma, a state feedback scheme is developed by which eigenfrequencies can be placed in stable half of the complex frequency plane. All the dynamic states of a plasma instability are approximately recovered from a single properly placed sensor signal via a state reconstructor. Then state feedback is used based on this approximate set of states. The resulting control information is introduced into the plasma via a single properly placed suppressor to stabilize all unstable modes without destabilizing any originally stable ones.

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Plasma Science, IEEE Transactions on  (Volume:7 ,  Issue: 2 )