Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles

M. S. Chu; J. M. Greene; L. L. Lao; R. L. Miller; A. Bondeson; O. Sauter; B. W. Rice; E. J. Strait; T. S. Taylor; A. D. Turnbull

doi:10.1103/PhysRevLett.77.2710

Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles

M. S. Chu, J. M. Greene, L. L. Lao, R. L. Miller, A. Bondeson, O. Sauter, B. W. Rice, E. J. Strait, T. S. Taylor, A. D. Turnbull

Institute of Space and Plasma Sciences

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

75 Citations (Scopus)

Abstract

Resistive interchange modes can be driven unstable by large pressure gradients in the negative central magnetic shear (NCS) region of advanced tokamaks. Localized stability analysis reveals that the resistive interchange stability criterion (D_R ≤ 0) is violated in this region, and unstable n = 1 localized resistive magnetohydrodynamic (MHD) modes are computed using the resistive MHD code mars. In DIII-D NCS plasmas, these instabilities appear as bursting MHD activities, constituting the first identification of resistive interchange in a high temperature tokamak experiment. These bursts also appear to play a role in triggering disruptions.

Original language	English
Pages (from-to)	2710-2713
Number of pages	4
Journal	Physical review letters
Volume	77
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.77.2710
Publication status	Published - 1996

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.77.2710

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title = "Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles",

abstract = "Resistive interchange modes can be driven unstable by large pressure gradients in the negative central magnetic shear (NCS) region of advanced tokamaks. Localized stability analysis reveals that the resistive interchange stability criterion (DR ≤ 0) is violated in this region, and unstable n = 1 localized resistive magnetohydrodynamic (MHD) modes are computed using the resistive MHD code mars. In DIII-D NCS plasmas, these instabilities appear as bursting MHD activities, constituting the first identification of resistive interchange in a high temperature tokamak experiment. These bursts also appear to play a role in triggering disruptions.",

author = "Chu, {M. S.} and Greene, {J. M.} and Lao, {L. L.} and Miller, {R. L.} and A. Bondeson and O. Sauter and Rice, {B. W.} and Strait, {E. J.} and Taylor, {T. S.} and Turnbull, {A. D.}",

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language = "English",

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T1 - Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles

AU - Chu, M. S.

AU - Greene, J. M.

AU - Lao, L. L.

AU - Miller, R. L.

AU - Bondeson, A.

AU - Sauter, O.

AU - Rice, B. W.

AU - Strait, E. J.

AU - Taylor, T. S.

AU - Turnbull, A. D.

PY - 1996

Y1 - 1996

N2 - Resistive interchange modes can be driven unstable by large pressure gradients in the negative central magnetic shear (NCS) region of advanced tokamaks. Localized stability analysis reveals that the resistive interchange stability criterion (DR ≤ 0) is violated in this region, and unstable n = 1 localized resistive magnetohydrodynamic (MHD) modes are computed using the resistive MHD code mars. In DIII-D NCS plasmas, these instabilities appear as bursting MHD activities, constituting the first identification of resistive interchange in a high temperature tokamak experiment. These bursts also appear to play a role in triggering disruptions.

AB - Resistive interchange modes can be driven unstable by large pressure gradients in the negative central magnetic shear (NCS) region of advanced tokamaks. Localized stability analysis reveals that the resistive interchange stability criterion (DR ≤ 0) is violated in this region, and unstable n = 1 localized resistive magnetohydrodynamic (MHD) modes are computed using the resistive MHD code mars. In DIII-D NCS plasmas, these instabilities appear as bursting MHD activities, constituting the first identification of resistive interchange in a high temperature tokamak experiment. These bursts also appear to play a role in triggering disruptions.

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DO - 10.1103/PhysRevLett.77.2710

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Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles

Abstract

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