Study of MHD activity in the HT-7 superconducting tokamak

M. Asif; X. Gao; J. G. Li; B. N. Wan

doi:10.1016/j.physleta.2005.05.032

Study of MHD activity in the HT-7 superconducting tokamak

M. Asif
, X. Gao
, J. G. Li
, B. N. Wan

School of Electrical Engineering

CAS - Institute of Plasma Physics

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

An attempt is made to explain the behavior of the magneto-hydrodynamic (MHD) instabilities observed at values of the edge safety factor 3<q(a)<4, on the HT-7 superconducting tokamak. For the poloidal-magnetic-field fluctuations observed at the Mirnov coils, Mirnov-coil analysis shows that the MHD activity consists predominantly of m=2 mode. Estimates are given for the characteristic growth time of the m=2 mode, τ_g, and the related rate of island growth, dW/dt. The experimental value of τ_g is found to be smaller than the linear theoretical one, and thus satisfy the condition τ_A<τ_g<τ_S (where ideal timescale is τ_A, and the resistive timescale is τ_S). However, the experimental and theoretical calculation of dW/dt are found to be in reasonable agreement with each other.

Original language	English
Pages (from-to)	175-180
Number of pages	6
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	342
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physleta.2005.05.032
State	Published - 4 Jul 2005

Keywords

Characteristic time
Disruptions
Magneto-hydrodynamic
Mirnov coil

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10.1016/j.physleta.2005.05.032

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abstract = "An attempt is made to explain the behavior of the magneto-hydrodynamic (MHD) instabilities observed at values of the edge safety factor 3g, and the related rate of island growth, dW/dt. The experimental value of τg is found to be smaller than the linear theoretical one, and thus satisfy the condition τA<τg<τS (where ideal timescale is τA, and the resistive timescale is τS). However, the experimental and theoretical calculation of dW/dt are found to be in reasonable agreement with each other.",

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T1 - Study of MHD activity in the HT-7 superconducting tokamak

AU - Asif, M.

AU - Gao, X.

AU - Li, J. G.

AU - Wan, B. N.

PY - 2005/7/4

Y1 - 2005/7/4

N2 - An attempt is made to explain the behavior of the magneto-hydrodynamic (MHD) instabilities observed at values of the edge safety factor 3g, and the related rate of island growth, dW/dt. The experimental value of τg is found to be smaller than the linear theoretical one, and thus satisfy the condition τA<τg<τS (where ideal timescale is τA, and the resistive timescale is τS). However, the experimental and theoretical calculation of dW/dt are found to be in reasonable agreement with each other.

AB - An attempt is made to explain the behavior of the magneto-hydrodynamic (MHD) instabilities observed at values of the edge safety factor 3g, and the related rate of island growth, dW/dt. The experimental value of τg is found to be smaller than the linear theoretical one, and thus satisfy the condition τA<τg<τS (where ideal timescale is τA, and the resistive timescale is τS). However, the experimental and theoretical calculation of dW/dt are found to be in reasonable agreement with each other.

KW - Characteristic time

KW - Disruptions

KW - Magneto-hydrodynamic

KW - Mirnov coil

UR - https://www.scopus.com/pages/publications/20644467035

U2 - 10.1016/j.physleta.2005.05.032

DO - 10.1016/j.physleta.2005.05.032

M3 - 文章

AN - SCOPUS:20644467035

SN - 0375-9601

VL - 342

SP - 175

EP - 180

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 1-2

ER -

Study of MHD activity in the HT-7 superconducting tokamak

Abstract

Keywords

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