Magnetic-flux pumping in high-performance, stationary plasmas with tearing modes

C. C. Petty; M. E. Austin; C. T. Holcomb; R. J. Jayakumar; R. J. La Haye; T. C. Luce; M. A. Makowski; P. A. Politzer; M. R. Wade

doi:10.1103/PhysRevLett.102.045005

Magnetic-flux pumping in high-performance, stationary plasmas with tearing modes

C. C. Petty, M. E. Austin, C. T. Holcomb, R. J. Jayakumar, R. J. La Haye, T. C. Luce, M. A. Makowski, P. A. Politzer, M. R. Wade

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

80 Scopus citations

Abstract

Analysis of the change in the magnetic field pitch angles during edge localized mode events in high performance, stationary plasmas on the DIII-D tokamak shows rapid (<1ms) broadening of the current density profile, but only when a m/n=3/2 tearing mode is present. This observation of poloidal magnetic-flux pumping explains an important feature of this scenario, which is the anomalous broadening of the current density profile that beneficially maintains the safety factor above unity and forestalls the sawtooth instability.

Original language	English
Article number	045005
Journal	Physical Review Letters
Volume	102
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.102.045005
State	Published - Jan 26 2009
Externally published	Yes

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10.1103/PhysRevLett.102.045005

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abstract = "Analysis of the change in the magnetic field pitch angles during edge localized mode events in high performance, stationary plasmas on the DIII-D tokamak shows rapid (<1ms) broadening of the current density profile, but only when a m/n=3/2 tearing mode is present. This observation of poloidal magnetic-flux pumping explains an important feature of this scenario, which is the anomalous broadening of the current density profile that beneficially maintains the safety factor above unity and forestalls the sawtooth instability.",

author = "Petty, {C. C.} and Austin, {M. E.} and Holcomb, {C. T.} and Jayakumar, {R. J.} and {La Haye}, {R. J.} and Luce, {T. C.} and Makowski, {M. A.} and Politzer, {P. A.} and Wade, {M. R.}",

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AU - Petty, C. C.

AU - Austin, M. E.

AU - Holcomb, C. T.

AU - Jayakumar, R. J.

AU - La Haye, R. J.

AU - Luce, T. C.

AU - Makowski, M. A.

AU - Politzer, P. A.

AU - Wade, M. R.

PY - 2009/1/26

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N2 - Analysis of the change in the magnetic field pitch angles during edge localized mode events in high performance, stationary plasmas on the DIII-D tokamak shows rapid (<1ms) broadening of the current density profile, but only when a m/n=3/2 tearing mode is present. This observation of poloidal magnetic-flux pumping explains an important feature of this scenario, which is the anomalous broadening of the current density profile that beneficially maintains the safety factor above unity and forestalls the sawtooth instability.

AB - Analysis of the change in the magnetic field pitch angles during edge localized mode events in high performance, stationary plasmas on the DIII-D tokamak shows rapid (<1ms) broadening of the current density profile, but only when a m/n=3/2 tearing mode is present. This observation of poloidal magnetic-flux pumping explains an important feature of this scenario, which is the anomalous broadening of the current density profile that beneficially maintains the safety factor above unity and forestalls the sawtooth instability.

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JO - Physical Review Letters

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ER -

Magnetic-flux pumping in high-performance, stationary plasmas with tearing modes

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