Analytical model of wall forces produced by kink perturbations in tokamaks

作者：Mironov D V^*; Pustovitov V D

来源：Physics of Plasmas, 2015, 22(5): 052502.

DOI：10.1063/1.4921660

Analytical model of the electromagnetic forces produced by kink modes on the tokamak wall [H. R. Strauss et al., Phys. Plasmas 17, 082505 (2010)] is revisited. One of the main conclusions of the mentioned paper is that the largest force occurs at gamma tau(w) approximate to 1, where gamma is the kink growth rate and tau(w) is the wall penetration time. In the present study, a similar approach is developed under less restrictive assumptions on the plasma and dynamics of perturbation, and a different result is obtained: the force increases with gamma and must be maximal at gamma tau(w) -> infinity. Additionally, the dependence of its amplitude on the plasma parameters is clarified. All distinctions and their reasons are explained in detail. The analysis is performed in the cylindrical model incorporating a resistive wall treated without traditional thin-wall constraints and covering therefore a full range in gamma tau(w). It is applicable to either locked or rotating modes. Estimates of the sideways force are presented and compared with earlier forecasts.

• 出版日期2015-5