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Title: Analytical model of wall forces produced by kink perturbations in tokamaks

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 γτ{sub w}≈1, where γ is the kink growth rate and τ{sub 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 γ and must be maximal at γτ{sub w}→∞. 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 γτ{sub w}. It is applicable to either locked or rotating modes. Estimates of the sideways force are presented and compared with earlier forecasts.
Authors:
 [1] ;  [2] ;  [3]
  1. Moscow Institute of Physics and Technology, Institutsky lane 9, Dolgoprudny, Moscow Region 141700 (Russian Federation)
  2. National Research Centre “Kurchatov Institute,” Moscow 123182 (Russian Federation)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22410315
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANALYTIC FUNCTIONS; CYLINDRICAL CONFIGURATION; DISTURBANCES; FIRST WALL; INSTABILITY GROWTH RATES; KINK INSTABILITY; LIMITING VALUES; PLASMA; TOKAMAK DEVICES