Published May 2005 | Version v1
Report Open

Effect of the resistive wall on the growth rate of weakly unstable external kink mode in general 3D configurations

Creators

  • 1. General Atomics, San Diego, California (United States)
  • 2. National Inst. for Fusion Sciences, Toki, Gifu (Japan)

Description

Formation of a method for the systematic computation of the growth rate of the weakly unstable RWM in 3D configurations by using results from ideal stability codes is presented. It is shown that the growth rate of the RWM is approximately given by the rate at which the available free energy for the ideal external kink mode can be dissipated by the resistive wall. The eigenfunction is also approximated by that of the external kink mode. This formulation is demonstrated by coupling to the ideal MHD code KSTEP with computation of the dissipation on the resistive wall. Results of the stability of the RWM in LHD plasmas and discussion on the validity and improvement to the computation are also included. (author)

Availability note (English)

Available from INIS in electronic form

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Additional details

Publishing Information

Imprint Pagination
23 p.
Report number
NIFS--812

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
37077685
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
COMPUTER CODES; COMPUTERIZED SIMULATION; DISSIPATION FACTOR; HELICAL CONFIGURATION; INSTABILITY GROWTH RATES; KINK INSTABILITY; LHD DEVICE; MHD EQUILIBRIUM; PLASMA; STABILITY; THREE-DIMENSIONAL CALCULATIONS; WALL EFFECTS
Descriptors DEC
CLOSED PLASMA DEVICES; CONFIGURATION; DIMENSIONLESS NUMBERS; EQUILIBRIUM; INSTABILITY; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; SIMULATION; THERMONUCLEAR DEVICES

Optional Information

Notes
26 refs., 7 figs.