Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D

M. Murakami; H. E. St. John; T. A. Casper; M. S. Chu; J. C. DeBoo; C. M. Greenfield; J. E. Kinsey; L. L. Lao; R. J. La Haye; Y. R. Lin-Liu; T. C. Luce; P. A. Politzer; B. W. Rice; G. M. Staebler; T. S. Taylor; M. R. Wade

doi:10.1088/0029-5515/40/6/320

Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D

M. Murakami, H. E. St. John, T. A. Casper, M. S. Chu, J. C. DeBoo, C. M. Greenfield, J. E. Kinsey, L. L. Lao, R. J. La Haye, Y. R. Lin-Liu, T. C. Luce, P. A. Politzer, B. W. Rice, G. M. Staebler, T. S. Taylor, M. R. Wade

Fusion and Fission Energy and Science Di

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Abstract

The status of modelling work focused on developing the advanced tokamak (AT) scenarios in DIII-D is discussed. The objective of the work is twofold: (a) to develop AT scenarios with ECCD using time dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (b) to use time dependent simulations to help plan experiments and to understand the key physics involved. Time dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modelling. The modelling indicates that off-axis ECCD with approximately 3 MW absorbed power can maintain high performance discharges with q_min > 1 for 5-10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. Progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.

Original language	English
Pages (from-to)	1257-1265
Number of pages	9
Journal	Nuclear Fusion
Volume	40
Issue number	6
DOIs	https://doi.org/10.1088/0029-5515/40/6/320
State	Published - Jun 2000

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Murakami, M., St. John, H. E., Casper, T. A., Chu, M. S., DeBoo, J. C., Greenfield, C. M., Kinsey, J. E., Lao, L. L., La Haye, R. J., Lin-Liu, Y. R., Luce, T. C., Politzer, P. A., Rice, B. W., Staebler, G. M., Taylor, T. S., & Wade, M. R. (2000). Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D. Nuclear Fusion, 40(6), 1257-1265. https://doi.org/10.1088/0029-5515/40/6/320

@article{33830df953db498d991890f53d4ce49f,

title = "Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D",

abstract = "The status of modelling work focused on developing the advanced tokamak (AT) scenarios in DIII-D is discussed. The objective of the work is twofold: (a) to develop AT scenarios with ECCD using time dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (b) to use time dependent simulations to help plan experiments and to understand the key physics involved. Time dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modelling. The modelling indicates that off-axis ECCD with approximately 3 MW absorbed power can maintain high performance discharges with qmin > 1 for 5-10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. Progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.",

author = "M. Murakami and {St. John}, {H. E.} and Casper, {T. A.} and Chu, {M. S.} and DeBoo, {J. C.} and Greenfield, {C. M.} and Kinsey, {J. E.} and Lao, {L. L.} and {La Haye}, {R. J.} and Lin-Liu, {Y. R.} and Luce, {T. C.} and Politzer, {P. A.} and Rice, {B. W.} and Staebler, {G. M.} and Taylor, {T. S.} and Wade, {M. R.}",

year = "2000",

month = jun,

doi = "10.1088/0029-5515/40/6/320",

language = "English",

volume = "40",

pages = "1257--1265",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing",

number = "6",

}

Murakami, M, St. John, HE, Casper, TA, Chu, MS, DeBoo, JC, Greenfield, CM, Kinsey, JE, Lao, LL, La Haye, RJ, Lin-Liu, YR, Luce, TC, Politzer, PA, Rice, BW, Staebler, GM, Taylor, TS & Wade, MR 2000, 'Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D', Nuclear Fusion, vol. 40, no. 6, pp. 1257-1265. https://doi.org/10.1088/0029-5515/40/6/320

TY - JOUR

T1 - Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D

AU - Murakami, M.

AU - St. John, H. E.

AU - Casper, T. A.

AU - Chu, M. S.

AU - DeBoo, J. C.

AU - Greenfield, C. M.

AU - Kinsey, J. E.

AU - Lao, L. L.

AU - La Haye, R. J.

AU - Lin-Liu, Y. R.

AU - Luce, T. C.

AU - Politzer, P. A.

AU - Rice, B. W.

AU - Staebler, G. M.

AU - Taylor, T. S.

AU - Wade, M. R.

PY - 2000/6

Y1 - 2000/6

N2 - The status of modelling work focused on developing the advanced tokamak (AT) scenarios in DIII-D is discussed. The objective of the work is twofold: (a) to develop AT scenarios with ECCD using time dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (b) to use time dependent simulations to help plan experiments and to understand the key physics involved. Time dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modelling. The modelling indicates that off-axis ECCD with approximately 3 MW absorbed power can maintain high performance discharges with qmin > 1 for 5-10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. Progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.

AB - The status of modelling work focused on developing the advanced tokamak (AT) scenarios in DIII-D is discussed. The objective of the work is twofold: (a) to develop AT scenarios with ECCD using time dependent transport simulations, coupled with heating and current drive models, consistent with MHD equilibrium and stability; and (b) to use time dependent simulations to help plan experiments and to understand the key physics involved. Time dependent simulations based on transport coefficients derived from experimentally achieved target discharges are used to perform AT scenario modelling. The modelling indicates that off-axis ECCD with approximately 3 MW absorbed power can maintain high performance discharges with qmin > 1 for 5-10 s. The resultant equilibria are calculated to be stable to n = 1 pressure driven modes. The plasma is well into the second stability regime for high-n ballooning modes over a large part of the plasma volume. The role of continuous localized ECCD is studied for stabilizing m/n = 2/1 tearing modes. Progress towards validating current drive and transport models, consistent with experimental results, and developing self-consistent, integrated high performance AT scenarios is discussed.

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U2 - 10.1088/0029-5515/40/6/320

DO - 10.1088/0029-5515/40/6/320

M3 - Article

AN - SCOPUS:17044449956

SN - 0029-5515

VL - 40

SP - 1257

EP - 1265

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

ER -

Status of advanced tokamak scenario modelling with off-axis electron cyclotron current drive in DIII-D

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