Modifications to the edge current profile with auxiliary edge current drive and improved confinement in a reversed-field pinch

B. E. Chapman; T. M. Biewer; P. K. Chattopadhyay; C. S. Chiang; D. J. Craig; N. A. Crocker; D. J. Den Hartog; G. Fiksel; P. W. Fontana; S. C. Prager; J. S. Sarff

doi:10.1063/1.1287913

Modifications to the edge current profile with auxiliary edge current drive and improved confinement in a reversed-field pinch

B. E. Chapman, T. M. Biewer, P. K. Chattopadhyay, C. S. Chiang, D. J. Craig, N. A. Crocker, D. J. Den Hartog, G. Fiksel, P. W. Fontana, S. C. Prager, J. S. Sarff

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

22 Scopus citations

Abstract

Auxiliary edge current drive is routinely applied in the Madison Symmetric Torus [R. N. Dexter, D. W. Kerst, T. W. Lovell et al., Fusion Technol. 19, 131 (1991)] with the goal of modifying the parallel current profile to reduce current-driven magnetic fluctuations and the associated particle and energy transport. Provided by an inductive electric field, the current drive successfully reduces fluctuations and transport. First-time measurements of the modified edge current profile reveal that, relative to discharges without auxiliary current drive, the edge current density decreases. This decrease is explicable in terms of newly measured reductions in the dynamo (fluctuation-based) electric field and the electrical conductivity. Induced by the current drive, these two changes to the edge plasma play as much of a role in determining the resultant edge current profile as does the current drive itself.

Original language	English (US)
Pages (from-to)	3491-3494
Number of pages	4
Journal	Physics of Plasmas
Volume	7
Issue number	9
DOIs	https://doi.org/10.1063/1.1287913
State	Published - Sep 2000

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Keywords

CHARGED-PARTICLE TRANSPORT
CURRENT-DRIVE HEATING
MAGNETOHYDRODYNAMICS
PLASMA CONFINEMENT
REVERSE-FIELD PINCH
REVERSED-FIELD PINCH DEVICES

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Chapman, B. E., Biewer, T. M., Chattopadhyay, P. K., Chiang, C. S., Craig, D. J., Crocker, N. A., Den Hartog, D. J., Fiksel, G., Fontana, P. W., Prager, S. C., & Sarff, J. S. (2000). Modifications to the edge current profile with auxiliary edge current drive and improved confinement in a reversed-field pinch. Physics of Plasmas, 7(9), 3491-3494. https://doi.org/10.1063/1.1287913

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abstract = "Auxiliary edge current drive is routinely applied in the Madison Symmetric Torus [R. N. Dexter, D. W. Kerst, T. W. Lovell et al., Fusion Technol. 19, 131 (1991)] with the goal of modifying the parallel current profile to reduce current-driven magnetic fluctuations and the associated particle and energy transport. Provided by an inductive electric field, the current drive successfully reduces fluctuations and transport. First-time measurements of the modified edge current profile reveal that, relative to discharges without auxiliary current drive, the edge current density decreases. This decrease is explicable in terms of newly measured reductions in the dynamo (fluctuation-based) electric field and the electrical conductivity. Induced by the current drive, these two changes to the edge plasma play as much of a role in determining the resultant edge current profile as does the current drive itself.",

keywords = "CHARGED-PARTICLE TRANSPORT, CURRENT-DRIVE HEATING, MAGNETOHYDRODYNAMICS, PLASMA CONFINEMENT, REVERSE-FIELD PINCH, REVERSED-FIELD PINCH DEVICES",

author = "Chapman, {B. E.} and Biewer, {T. M.} and Chattopadhyay, {P. K.} and Chiang, {C. S.} and Craig, {D. J.} and Crocker, {N. A.} and {Den Hartog}, {D. J.} and G. Fiksel and Fontana, {P. W.} and Prager, {S. C.} and Sarff, {J. S.}",

year = "2000",

month = sep,

doi = "10.1063/1.1287913",

language = "English (US)",

volume = "7",

pages = "3491--3494",

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T1 - Modifications to the edge current profile with auxiliary edge current drive and improved confinement in a reversed-field pinch

AU - Chapman, B. E.

AU - Biewer, T. M.

AU - Chattopadhyay, P. K.

AU - Chiang, C. S.

AU - Craig, D. J.

AU - Crocker, N. A.

AU - Den Hartog, D. J.

AU - Fiksel, G.

AU - Fontana, P. W.

AU - Prager, S. C.

AU - Sarff, J. S.

PY - 2000/9

Y1 - 2000/9

N2 - Auxiliary edge current drive is routinely applied in the Madison Symmetric Torus [R. N. Dexter, D. W. Kerst, T. W. Lovell et al., Fusion Technol. 19, 131 (1991)] with the goal of modifying the parallel current profile to reduce current-driven magnetic fluctuations and the associated particle and energy transport. Provided by an inductive electric field, the current drive successfully reduces fluctuations and transport. First-time measurements of the modified edge current profile reveal that, relative to discharges without auxiliary current drive, the edge current density decreases. This decrease is explicable in terms of newly measured reductions in the dynamo (fluctuation-based) electric field and the electrical conductivity. Induced by the current drive, these two changes to the edge plasma play as much of a role in determining the resultant edge current profile as does the current drive itself.

AB - Auxiliary edge current drive is routinely applied in the Madison Symmetric Torus [R. N. Dexter, D. W. Kerst, T. W. Lovell et al., Fusion Technol. 19, 131 (1991)] with the goal of modifying the parallel current profile to reduce current-driven magnetic fluctuations and the associated particle and energy transport. Provided by an inductive electric field, the current drive successfully reduces fluctuations and transport. First-time measurements of the modified edge current profile reveal that, relative to discharges without auxiliary current drive, the edge current density decreases. This decrease is explicable in terms of newly measured reductions in the dynamo (fluctuation-based) electric field and the electrical conductivity. Induced by the current drive, these two changes to the edge plasma play as much of a role in determining the resultant edge current profile as does the current drive itself.

KW - CHARGED-PARTICLE TRANSPORT

KW - CURRENT-DRIVE HEATING

KW - MAGNETOHYDRODYNAMICS

KW - PLASMA CONFINEMENT

KW - REVERSE-FIELD PINCH

KW - REVERSED-FIELD PINCH DEVICES

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JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 9

ER -

Modifications to the edge current profile with auxiliary edge current drive and improved confinement in a reversed-field pinch

Abstract

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Keywords

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