Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D

T. W. Petrie; J. G. Watkins; L. R. Baylor; N. H. Brooks; M. E. Fenstermacher; A. W. Hyatt; G. L. Jackson; C. J. Lasnier; A. W. Leonard; A. Yu Pigarov; M. E. Rensink; T. D. Rognlien; M. J. Schaffer; N. S. Wolf

doi:10.1016/S0022-3115(02)01459-9

Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D

T. W. Petrie
, J. G. Watkins
, L. R. Baylor
, N. H. Brooks
, M. E. Fenstermacher
, A. W. Hyatt
, G. L. Jackson
, C. J. Lasnier
, A. W. Leonard
, A. Yu Pigarov
, M. E. Rensink
, T. D. Rognlien
, M. J. Schaffer
, N. S. Wolf

Research output: Contribution to journal › Conference article › peer-review

28 Scopus citations

Abstract

Changes in the divertor magnetic balance in DIII-D H-mode plasmas affects core, edge, and divertor plasma behavior. Both the pedestal density n_e,PED and plasma stored energy W_T were sensitive to changes in magnetic balance near the double-null (DN) configuration, e.g., both decreased 20-30% when the DN shifted to a slightly unbalanced DN, where the B × ∇B drift direction pointed away from the main X-point. Recycling at each of the four divertor targets was sensitive to changes in magnetic balance and the B × ∇B drift direction. The poloidal distribution of the recycling in DN is in qualitative agreement with the predictions of UEDGE modeling with particle drifts included. The particle flux at the inner divertor target is shown to be much more sensitive to magnetic balance than the particle flux at the outer divertor target near the DN shape. These results suggest possible advantages and drawbacks for balanced DN operation.

Original language	English
Pages (from-to)	834-838
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	313-316
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/S0022-3115(02)01459-9
State	Published - Mar 2003
Event	Plasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan Duration: May 26 2002 → May 31 2002

Keywords

DIII-D
Divertor
Double-null
Magnetic balance
Recycling
UEDGE

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10.1016/S0022-3115(02)01459-9

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Petrie, T. W., Watkins, J. G., Baylor, L. R., Brooks, N. H., Fenstermacher, M. E., Hyatt, A. W., Jackson, G. L., Lasnier, C. J., Leonard, A. W., Pigarov, A. Y., Rensink, M. E., Rognlien, T. D., Schaffer, M. J., & Wolf, N. S. (2003). Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D. Journal of Nuclear Materials, 313-316(SUPPL.), 834-838. https://doi.org/10.1016/S0022-3115(02)01459-9

@article{f307c27f943443f19b6f8b3985bd4551,

title = "Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D",

abstract = "Changes in the divertor magnetic balance in DIII-D H-mode plasmas affects core, edge, and divertor plasma behavior. Both the pedestal density ne,PED and plasma stored energy WT were sensitive to changes in magnetic balance near the double-null (DN) configuration, e.g., both decreased 20-30\% when the DN shifted to a slightly unbalanced DN, where the B × ∇B drift direction pointed away from the main X-point. Recycling at each of the four divertor targets was sensitive to changes in magnetic balance and the B × ∇B drift direction. The poloidal distribution of the recycling in DN is in qualitative agreement with the predictions of UEDGE modeling with particle drifts included. The particle flux at the inner divertor target is shown to be much more sensitive to magnetic balance than the particle flux at the outer divertor target near the DN shape. These results suggest possible advantages and drawbacks for balanced DN operation.",

keywords = "DIII-D, Divertor, Double-null, Magnetic balance, Recycling, UEDGE",

author = "Petrie, \{T. W.\} and Watkins, \{J. G.\} and Baylor, \{L. R.\} and Brooks, \{N. H.\} and Fenstermacher, \{M. E.\} and Hyatt, \{A. W.\} and Jackson, \{G. L.\} and Lasnier, \{C. J.\} and Leonard, \{A. W.\} and Pigarov, \{A. Yu\} and Rensink, \{M. E.\} and Rognlien, \{T. D.\} and Schaffer, \{M. J.\} and Wolf, \{N. S.\}",

year = "2003",

month = mar,

doi = "10.1016/S0022-3115(02)01459-9",

language = "English",

volume = "313-316",

pages = "834--838",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "SUPPL.",

note = "Plasma - Surface Interactions in Controlled Fusion Devices ; Conference date: 26-05-2002 Through 31-05-2002",

}

Petrie, TW, Watkins, JG, Baylor, LR, Brooks, NH, Fenstermacher, ME, Hyatt, AW, Jackson, GL, Lasnier, CJ, Leonard, AW, Pigarov, AY, Rensink, ME, Rognlien, TD, Schaffer, MJ & Wolf, NS 2003, 'Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D', Journal of Nuclear Materials, vol. 313-316, no. SUPPL., pp. 834-838. https://doi.org/10.1016/S0022-3115(02)01459-9

TY - JOUR

T1 - Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D

AU - Petrie, T. W.

AU - Watkins, J. G.

AU - Baylor, L. R.

AU - Brooks, N. H.

AU - Fenstermacher, M. E.

AU - Hyatt, A. W.

AU - Jackson, G. L.

AU - Lasnier, C. J.

AU - Leonard, A. W.

AU - Pigarov, A. Yu

AU - Rensink, M. E.

AU - Rognlien, T. D.

AU - Schaffer, M. J.

AU - Wolf, N. S.

PY - 2003/3

Y1 - 2003/3

N2 - Changes in the divertor magnetic balance in DIII-D H-mode plasmas affects core, edge, and divertor plasma behavior. Both the pedestal density ne,PED and plasma stored energy WT were sensitive to changes in magnetic balance near the double-null (DN) configuration, e.g., both decreased 20-30% when the DN shifted to a slightly unbalanced DN, where the B × ∇B drift direction pointed away from the main X-point. Recycling at each of the four divertor targets was sensitive to changes in magnetic balance and the B × ∇B drift direction. The poloidal distribution of the recycling in DN is in qualitative agreement with the predictions of UEDGE modeling with particle drifts included. The particle flux at the inner divertor target is shown to be much more sensitive to magnetic balance than the particle flux at the outer divertor target near the DN shape. These results suggest possible advantages and drawbacks for balanced DN operation.

AB - Changes in the divertor magnetic balance in DIII-D H-mode plasmas affects core, edge, and divertor plasma behavior. Both the pedestal density ne,PED and plasma stored energy WT were sensitive to changes in magnetic balance near the double-null (DN) configuration, e.g., both decreased 20-30% when the DN shifted to a slightly unbalanced DN, where the B × ∇B drift direction pointed away from the main X-point. Recycling at each of the four divertor targets was sensitive to changes in magnetic balance and the B × ∇B drift direction. The poloidal distribution of the recycling in DN is in qualitative agreement with the predictions of UEDGE modeling with particle drifts included. The particle flux at the inner divertor target is shown to be much more sensitive to magnetic balance than the particle flux at the outer divertor target near the DN shape. These results suggest possible advantages and drawbacks for balanced DN operation.

KW - DIII-D

KW - Divertor

KW - Double-null

KW - Magnetic balance

KW - Recycling

KW - UEDGE

UR - https://www.scopus.com/pages/publications/13844319124

U2 - 10.1016/S0022-3115(02)01459-9

DO - 10.1016/S0022-3115(02)01459-9

M3 - Conference article

AN - SCOPUS:13844319124

SN - 0022-3115

VL - 313-316

SP - 834

EP - 838

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - SUPPL.

T2 - Plasma - Surface Interactions in Controlled Fusion Devices

Y2 - 26 May 2002 through 31 May 2002

ER -

Changes in edge and scrape-off layer plasma behavior due to variation in magnetic balance in DIII-D

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Keywords

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