ELM suppression by resonant magnetic perturbation in high-performance, stationary plasmas

B. Hudson; T. E. Evans; T. H. Osborne; C. C. Petty; P. B. Snyder; E. A. Unterberg

doi:10.1088/0029-5515/50/4/045006

ELM suppression by resonant magnetic perturbation in high-performance, stationary plasmas

B. Hudson, T. E. Evans, T. H. Osborne, C. C. Petty, P. B. Snyder, E. A. Unterberg

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

10 Scopus citations

Abstract

The method of resonant magnetic perturbation (RMP) has been shown to suppress edge-localized modes (ELMs) in the high-performance, stationary (or 'hybrid') scenario in the DIII-D tokamak. Calculations of stability to peeling-ballooning (P-B) modes are shown to be consistent with the observed suppression of type-I ELMs, while the ELM suppression, dependence on edge safety factor and density pump-out are similar for hybrids and standard H-mode discharges. However, other small ELMs can appear when the edge safety factor is outside the resonance window or when the H-mode pedestal is perturbed, which are not related to P-B stability. The role of the edge bootstrap current in determining stochastic heat transport during RMP is discussed.

Original language	English
Article number	045006
Journal	Nuclear Fusion
Volume	50
Issue number	4
DOIs	https://doi.org/10.1088/0029-5515/50/4/045006
State	Published - 2010
Externally published	Yes

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title = "ELM suppression by resonant magnetic perturbation in high-performance, stationary plasmas",

abstract = "The method of resonant magnetic perturbation (RMP) has been shown to suppress edge-localized modes (ELMs) in the high-performance, stationary (or 'hybrid') scenario in the DIII-D tokamak. Calculations of stability to peeling-ballooning (P-B) modes are shown to be consistent with the observed suppression of type-I ELMs, while the ELM suppression, dependence on edge safety factor and density pump-out are similar for hybrids and standard H-mode discharges. However, other small ELMs can appear when the edge safety factor is outside the resonance window or when the H-mode pedestal is perturbed, which are not related to P-B stability. The role of the edge bootstrap current in determining stochastic heat transport during RMP is discussed.",

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AU - Hudson, B.

AU - Evans, T. E.

AU - Osborne, T. H.

AU - Petty, C. C.

AU - Snyder, P. B.

AU - Unterberg, E. A.

PY - 2010

Y1 - 2010

N2 - The method of resonant magnetic perturbation (RMP) has been shown to suppress edge-localized modes (ELMs) in the high-performance, stationary (or 'hybrid') scenario in the DIII-D tokamak. Calculations of stability to peeling-ballooning (P-B) modes are shown to be consistent with the observed suppression of type-I ELMs, while the ELM suppression, dependence on edge safety factor and density pump-out are similar for hybrids and standard H-mode discharges. However, other small ELMs can appear when the edge safety factor is outside the resonance window or when the H-mode pedestal is perturbed, which are not related to P-B stability. The role of the edge bootstrap current in determining stochastic heat transport during RMP is discussed.

AB - The method of resonant magnetic perturbation (RMP) has been shown to suppress edge-localized modes (ELMs) in the high-performance, stationary (or 'hybrid') scenario in the DIII-D tokamak. Calculations of stability to peeling-ballooning (P-B) modes are shown to be consistent with the observed suppression of type-I ELMs, while the ELM suppression, dependence on edge safety factor and density pump-out are similar for hybrids and standard H-mode discharges. However, other small ELMs can appear when the edge safety factor is outside the resonance window or when the H-mode pedestal is perturbed, which are not related to P-B stability. The role of the edge bootstrap current in determining stochastic heat transport during RMP is discussed.

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DO - 10.1088/0029-5515/50/4/045006

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SN - 0029-5515

VL - 50

JO - Nuclear Fusion

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ER -

ELM suppression by resonant magnetic perturbation in high-performance, stationary plasmas

Abstract

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