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Edge localized modes in DIII-D high performance discharges

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Edge localized modes in DIII-D high performance discharges. / Turnbull, A D ; Lao, L L ; Osborne, T H ; Sauter, O ; Strait, E J ; Taylor, T S ; Chu, M S ; Ferron, J R ; Greenfield, C M ; Leonard, A W ; Miller, R L ; Snyder, P B ; Wilson, H R ; Zohm, H .

In: Plasma Physics and Controlled Fusion, Vol. 45, No. 10, 10.2003, p. 1845-1872.

Research output: Contribution to journalArticlepeer-review

Harvard

Turnbull, AD, Lao, LL, Osborne, TH, Sauter, O, Strait, EJ, Taylor, TS, Chu, MS, Ferron, JR, Greenfield, CM, Leonard, AW, Miller, RL, Snyder, PB, Wilson, HR & Zohm, H 2003, 'Edge localized modes in DIII-D high performance discharges', Plasma Physics and Controlled Fusion, vol. 45, no. 10, pp. 1845-1872.

APA

Turnbull, A. D., Lao, L. L., Osborne, T. H., Sauter, O., Strait, E. J., Taylor, T. S., Chu, M. S., Ferron, J. R., Greenfield, C. M., Leonard, A. W., Miller, R. L., Snyder, P. B., Wilson, H. R., & Zohm, H. (2003). Edge localized modes in DIII-D high performance discharges. Plasma Physics and Controlled Fusion, 45(10), 1845-1872.

Vancouver

Turnbull AD, Lao LL, Osborne TH, Sauter O, Strait EJ, Taylor TS et al. Edge localized modes in DIII-D high performance discharges. Plasma Physics and Controlled Fusion. 2003 Oct;45(10):1845-1872.

Author

Turnbull, A D ; Lao, L L ; Osborne, T H ; Sauter, O ; Strait, E J ; Taylor, T S ; Chu, M S ; Ferron, J R ; Greenfield, C M ; Leonard, A W ; Miller, R L ; Snyder, P B ; Wilson, H R ; Zohm, H . / Edge localized modes in DIII-D high performance discharges. In: Plasma Physics and Controlled Fusion. 2003 ; Vol. 45, No. 10. pp. 1845-1872.

Bibtex - Download

@article{bed80f61a53b4e1bb7991dc40d149b55,
title = "Edge localized modes in DIII-D high performance discharges",
abstract = "A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD) instability and the ELM severity is determined by the radial width of the linearly unstable MHD kink modes. A detailed, comparative study of the penetration into the core of the respective linear instabilities in a standard DIII-D ELMing, high confinement mode (H-mode) discharge, with that for two relatively high performance discharges shows that these are also encompassed within the framework of the new model. These instabilities represent the key limiting factor in extending the high performance of these discharges. In the standard ELMing H-mode, the MHD instabilities are highly localized in the outer few per cent flux surfaces, and the ELM is benign, causing only a small temporary drop in the energy confinement. In contrast, for both a very high confinement mode and an H-mode with a broad internal transport barrier extending over the entire core and coalesced with the edge transport barrier, the linearly unstable modes penetrate well into the mid radius and the corresponding consequences for global confinement are significantly more severe. The ELM accordingly results in an irreversible loss of the high performance.",
author = "Turnbull, {A D} and Lao, {L L} and Osborne, {T H} and O Sauter and Strait, {E J} and Taylor, {T S} and Chu, {M S} and Ferron, {J R} and Greenfield, {C M} and Leonard, {A W} and Miller, {R L} and Snyder, {P B} and Wilson, {H R} and H Zohm",
year = "2003",
month = oct,
language = "English",
volume = "45",
pages = "1845--1872",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing Ltd.",
number = "10",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Edge localized modes in DIII-D high performance discharges

AU - Turnbull, A D

AU - Lao, L L

AU - Osborne, T H

AU - Sauter, O

AU - Strait, E J

AU - Taylor, T S

AU - Chu, M S

AU - Ferron, J R

AU - Greenfield, C M

AU - Leonard, A W

AU - Miller, R L

AU - Snyder, P B

AU - Wilson, H R

AU - Zohm, H

PY - 2003/10

Y1 - 2003/10

N2 - A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD) instability and the ELM severity is determined by the radial width of the linearly unstable MHD kink modes. A detailed, comparative study of the penetration into the core of the respective linear instabilities in a standard DIII-D ELMing, high confinement mode (H-mode) discharge, with that for two relatively high performance discharges shows that these are also encompassed within the framework of the new model. These instabilities represent the key limiting factor in extending the high performance of these discharges. In the standard ELMing H-mode, the MHD instabilities are highly localized in the outer few per cent flux surfaces, and the ELM is benign, causing only a small temporary drop in the energy confinement. In contrast, for both a very high confinement mode and an H-mode with a broad internal transport barrier extending over the entire core and coalesced with the edge transport barrier, the linearly unstable modes penetrate well into the mid radius and the corresponding consequences for global confinement are significantly more severe. The ELM accordingly results in an irreversible loss of the high performance.

AB - A new understanding of edge localized modes (ELMs) in tokamak discharges is emerging (Snyder P B et al 2002 Phys. Plasmas 9 2037), in which the ELM is an essentially ideal magnetohydrodynamic (MHD) instability and the ELM severity is determined by the radial width of the linearly unstable MHD kink modes. A detailed, comparative study of the penetration into the core of the respective linear instabilities in a standard DIII-D ELMing, high confinement mode (H-mode) discharge, with that for two relatively high performance discharges shows that these are also encompassed within the framework of the new model. These instabilities represent the key limiting factor in extending the high performance of these discharges. In the standard ELMing H-mode, the MHD instabilities are highly localized in the outer few per cent flux surfaces, and the ELM is benign, causing only a small temporary drop in the energy confinement. In contrast, for both a very high confinement mode and an H-mode with a broad internal transport barrier extending over the entire core and coalesced with the edge transport barrier, the linearly unstable modes penetrate well into the mid radius and the corresponding consequences for global confinement are significantly more severe. The ELM accordingly results in an irreversible loss of the high performance.

M3 - Article

VL - 45

SP - 1845

EP - 1872

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 10

ER -