Summary EX/P4-20: Resistive Wall Mode Studies utilizing External Perturbations P. R. Brunsell, L. Frassinetti, F. A. Volpe, K. E. J. Olofsson, R. Fridström,

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Summary EX/P4-20: Resistive Wall Mode Studies utilizing External Perturbations P. R. Brunsell, L. Frassinetti, F. A. Volpe, K. E. J. Olofsson, R. Fridström, A.C. Setiadi KTH Royal Institute of Technology, Stockholm, Sweden Columbia University, New York, USA Experimental methods for resistive wall mode studies utilizing external perturbations have been developed in the reversed field pinch EXTRAP T2R. The methods are general and intended for use in both RFP and Tokamak. Estimation of the wall time constant for non-axisymmetric fields Assessment of machine error field Extraction of RWM dynamics