Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D

M. Murakami; M. R. Wade; C. M. Greenfield; T. C. Luce; M. A. Makowski; C. C. Petty; J. C. DeBoo; J. R. Ferron; R. J. Jayakumar; L. L. Lao; J. Lohr; P. A. Politzer; R. Prater; H. E. St. John

doi:10.1103/PhysRevLett.90.255001

Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D

M. Murakami, M. R. Wade, C. M. Greenfield, T. C. Luce, M. A. Makowski, C. C. Petty, J. C. DeBoo, J. R. Ferron, R. J. Jayakumar, L. L. Lao, J. Lohr, P. A. Politzer, R. Prater, H. E. St. John

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Abstract

Recent DIII-D experiments using off-axis electron cyclotron current drive (ECCD) have demonstrated the ability to modify the current profile in a plasma with toroidal beta near 3%. The resulting plasma simultaneously sustains the key elements required for Advanced Tokamak operation: high bootstrap current fraction, high beta, and good confinement. More than 85% of the plasma current is driven by noninductive means. ECCD is observed to produce strong negative central magnetic shear, which in turn acts to trigger confinement improvements in all transport channels in the plasma core.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical Review Letters
Volume	90
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.90.255001
State	Published - 2003

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Murakami, M., Wade, M. R., Greenfield, C. M., Luce, T. C., Makowski, M. A., Petty, C. C., DeBoo, J. C., Ferron, J. R., Jayakumar, R. J., Lao, L. L., Lohr, J., Politzer, P. A., Prater, R., & St. John, H. E. (2003). Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D. Physical Review Letters, 90(25), 4. https://doi.org/10.1103/PhysRevLett.90.255001

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title = "Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D",

abstract = "Recent DIII-D experiments using off-axis electron cyclotron current drive (ECCD) have demonstrated the ability to modify the current profile in a plasma with toroidal beta near 3%. The resulting plasma simultaneously sustains the key elements required for Advanced Tokamak operation: high bootstrap current fraction, high beta, and good confinement. More than 85% of the plasma current is driven by noninductive means. ECCD is observed to produce strong negative central magnetic shear, which in turn acts to trigger confinement improvements in all transport channels in the plasma core.",

author = "M. Murakami and Wade, {M. R.} and Greenfield, {C. M.} and Luce, {T. C.} and Makowski, {M. A.} and Petty, {C. C.} and DeBoo, {J. C.} and Ferron, {J. R.} and Jayakumar, {R. J.} and Lao, {L. L.} and J. Lohr and Politzer, {P. A.} and R. Prater and {St. John}, {H. E.}",

year = "2003",

doi = "10.1103/PhysRevLett.90.255001",

language = "English",

volume = "90",

pages = "4",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Murakami, M, Wade, MR , Greenfield, CM, Luce, TC, Makowski, MA, Petty, CC, DeBoo, JC, Ferron, JR, Jayakumar, RJ, Lao, LL, Lohr, J, Politzer, PA, Prater, R & St. John, HE 2003, 'Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D', Physical Review Letters, vol. 90, no. 25, pp. 4. https://doi.org/10.1103/PhysRevLett.90.255001

TY - JOUR

T1 - Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D

AU - Murakami, M.

AU - Wade, M. R.

AU - Greenfield, C. M.

AU - Luce, T. C.

AU - Makowski, M. A.

AU - Petty, C. C.

AU - DeBoo, J. C.

AU - Ferron, J. R.

AU - Jayakumar, R. J.

AU - Lao, L. L.

AU - Lohr, J.

AU - Politzer, P. A.

AU - Prater, R.

AU - St. John, H. E.

PY - 2003

Y1 - 2003

N2 - Recent DIII-D experiments using off-axis electron cyclotron current drive (ECCD) have demonstrated the ability to modify the current profile in a plasma with toroidal beta near 3%. The resulting plasma simultaneously sustains the key elements required for Advanced Tokamak operation: high bootstrap current fraction, high beta, and good confinement. More than 85% of the plasma current is driven by noninductive means. ECCD is observed to produce strong negative central magnetic shear, which in turn acts to trigger confinement improvements in all transport channels in the plasma core.

AB - Recent DIII-D experiments using off-axis electron cyclotron current drive (ECCD) have demonstrated the ability to modify the current profile in a plasma with toroidal beta near 3%. The resulting plasma simultaneously sustains the key elements required for Advanced Tokamak operation: high bootstrap current fraction, high beta, and good confinement. More than 85% of the plasma current is driven by noninductive means. ECCD is observed to produce strong negative central magnetic shear, which in turn acts to trigger confinement improvements in all transport channels in the plasma core.

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U2 - 10.1103/PhysRevLett.90.255001

DO - 10.1103/PhysRevLett.90.255001

M3 - Article

AN - SCOPUS:85038335846

SN - 0031-9007

VL - 90

SP - 4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

ER -

Modification of the Current Profile in High-Performance Plasmas using Off-Axis Electron-Cyclotron-Current Drive in DIII-D

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