J. Bialek, A. Garofalo, G. Jackson, M. J. Lanctot, E. Lazarus, J. P. Levesque, P. Martin, M. E. Mauel, G. A. Navratil, M. Okabayashi, C. Paz-Soldan, P. Piovesan, E. Strait, F. Turco, A. Turnbull
ITPA Joint Experiment :
No
Description:
Unstable resistive wall modes (RWMs) and the loss of active RWM control are problems that lead to disruptions in plasmas with q95 < 2. This experiment would address the control issues, and if successful, lead to a feedback-stabilized q95 < 2 discharge or a determination of the feedback limit (eg, the maximum open-loop growth rate or minimum q95 that can be stabilized using feedback).
ITER IO Urgent Research Task :
No
Experimental Approach/Plan:
Background:
Resource Requirements:
Diagnostic Requirements:
Magnetics, MSE, CER, Thomson scattering, ECE radiometer, density interferometer
Analysis Requirements:
Determination of RWM feedback system transfer function and feedback modeling, prior to experiment.