Risk analysis of wall forces in high-current RFP plasma operations

Abstract

Abstract In this paper, the definition of a framework for assessing and managing the risk related to magnetic forces on the wall during high-current reversed field pinch (RFP) plasma operations is presented. The magnetic forces occurring in 582 RFX-mod shots with fast termination are computed for the whole discharge duration. The resulting force distribution is examined using statistical tools from extreme value theory to estimate the magnitude and probability of large potential values of forces during the operations. Starting from RFX-mod results, the risk related to wall forces is quantified for RFX-mod2 operations.