Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D

C. C. Petty; M. E. Austin; D. P. Brennan; K. H. Burrell; J. C. Deboo; E. J. Doyle; J. R. Ferron; A. M. Garofalo; J. C. Hillesheim; C. T. Holcomb; C. Holland; A. W. Hyatt; Y. In; G. L. Jackson; J. Lohr; T. C. Luce; M. A. Makowski; M. Murakami; M. Okabayashi; P. A. Politzer; R. Prater; H. Reimerdes; T. L. Rhodes; L. Schmitz; S. P. Smith; W. M. Solomon; G. M. Staebler; R. Takahashi; F. Turco; A. D. Turnbull; M. A. Van Zeeland; G. Wang; A. E. White; L. Zeng

doi:10.1063/1.3665023

Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D

C. C. Petty, M. E. Austin, D. P. Brennan, K. H. Burrell, J. C. Deboo, E. J. Doyle, J. R. Ferron, A. M. Garofalo, J. C. Hillesheim, C. T. Holcomb, C. Holland, A. W. Hyatt, Y. In, G. L. Jackson, J. Lohr, T. C. Luce, M. A. Makowski, M. Murakami, M. Okabayashi, P. A. PolitzerR. Prater, H. Reimerdes, T. L. Rhodes, L. Schmitz, S. P. Smith, W. M. Solomon, G. M. Staebler, R. Takahashi, F. Turco, A. D. Turnbull, M. A. Van Zeeland, G. Wang, A. E. White, L. Zeng

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

High-power electron cyclotron (EC) waves are used to increase performance in several Advanced Tokamak (AT) regimes on DIII-D where there is a simultaneous need for high noninductive current and high beta. In the Quiescent High-confinement mode (QH-mode), a direct measurement of the electron cyclotron current drive (ECCD) profile is made using modulation techniques, and a trapped electron mode (TEM) dominated regime with core T _e>T _i is created. In the "highq _min" AT scenario, ECCD provides part of the off-axis noninductive current and helps to produce a tearing stable equilibrium. In the hybrid regime, strong central current drive from EC waves and other sources increases the noninductive current fraction to ≈100%. Surprisingly, the core safety factor remains above unity, meaning good alignment between the current drive profile and the desired plasma current profile is not necessary in this scenario.

Original language	English
Title of host publication	Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference
Pages	497-504
Number of pages	8
DOIs	https://doi.org/10.1063/1.3665023
State	Published - 2011
Externally published	Yes
Event	19th Topical Conference on Radio Frequency Power in Plasmas - Newport, RI, United States Duration: Jun 1 2011 → Jul 3 2011

Publication series

Name	AIP Conference Proceedings
Volume	1406
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	19th Topical Conference on Radio Frequency Power in Plasmas
Country/Territory	United States
City	Newport, RI
Period	06/1/11 → 07/3/11

Keywords

ECCD
noninductive current drive
stability
transport

Access to Document

10.1063/1.3665023

Cite this

Petty, C. C., Austin, M. E., Brennan, D. P., Burrell, K. H., Deboo, J. C., Doyle, E. J., Ferron, J. R., Garofalo, A. M., Hillesheim, J. C., Holcomb, C. T., Holland, C., Hyatt, A. W., In, Y., Jackson, G. L., Lohr, J., Luce, T. C., Makowski, M. A., Murakami, M., Okabayashi, M., ... Zeng, L. (2011). Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D. In Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference (pp. 497-504). (AIP Conference Proceedings; Vol. 1406). https://doi.org/10.1063/1.3665023

@inproceedings{dc6059e1515048779cca14e6ccd2c2b2,

title = "Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D",

abstract = "High-power electron cyclotron (EC) waves are used to increase performance in several Advanced Tokamak (AT) regimes on DIII-D where there is a simultaneous need for high noninductive current and high beta. In the Quiescent High-confinement mode (QH-mode), a direct measurement of the electron cyclotron current drive (ECCD) profile is made using modulation techniques, and a trapped electron mode (TEM) dominated regime with core T e>T i is created. In the {"}highq min{"} AT scenario, ECCD provides part of the off-axis noninductive current and helps to produce a tearing stable equilibrium. In the hybrid regime, strong central current drive from EC waves and other sources increases the noninductive current fraction to ≈100\%. Surprisingly, the core safety factor remains above unity, meaning good alignment between the current drive profile and the desired plasma current profile is not necessary in this scenario.",

keywords = "ECCD, noninductive current drive, stability, transport",

author = "Petty, \{C. C.\} and Austin, \{M. E.\} and Brennan, \{D. P.\} and Burrell, \{K. H.\} and Deboo, \{J. C.\} and Doyle, \{E. J.\} and Ferron, \{J. R.\} and Garofalo, \{A. M.\} and Hillesheim, \{J. C.\} and Holcomb, \{C. T.\} and C. Holland and Hyatt, \{A. W.\} and Y. In and Jackson, \{G. L.\} and J. Lohr and Luce, \{T. C.\} and Makowski, \{M. A.\} and M. Murakami and M. Okabayashi and Politzer, \{P. A.\} and R. Prater and H. Reimerdes and Rhodes, \{T. L.\} and L. Schmitz and Smith, \{S. P.\} and Solomon, \{W. M.\} and Staebler, \{G. M.\} and R. Takahashi and F. Turco and Turnbull, \{A. D.\} and \{Van Zeeland\}, \{M. A.\} and G. Wang and White, \{A. E.\} and L. Zeng",

year = "2011",

doi = "10.1063/1.3665023",

language = "English",

isbn = "9780735409781",

series = "AIP Conference Proceedings",

pages = "497--504",

booktitle = "Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference",

note = "19th Topical Conference on Radio Frequency Power in Plasmas ; Conference date: 01-06-2011 Through 03-07-2011",

}

Petty, CC, Austin, ME, Brennan, DP, Burrell, KH, Deboo, JC, Doyle, EJ, Ferron, JR, Garofalo, AM, Hillesheim, JC, Holcomb, CT, Holland, C, Hyatt, AW, In, Y, Jackson, GL, Lohr, J, Luce, TC, Makowski, MA, Murakami, M, Okabayashi, M, Politzer, PA, Prater, R, Reimerdes, H, Rhodes, TL, Schmitz, L, Smith, SP, Solomon, WM, Staebler, GM, Takahashi, R, Turco, F, Turnbull, AD, Van Zeeland, MA, Wang, G, White, AE & Zeng, L 2011, Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D. in Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference. AIP Conference Proceedings, vol. 1406, pp. 497-504, 19th Topical Conference on Radio Frequency Power in Plasmas, Newport, RI, United States, 06/1/11. https://doi.org/10.1063/1.3665023

Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D. / Petty, C. C.; Austin, M. E.; Brennan, D. P. et al.
Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference. 2011. p. 497-504 (AIP Conference Proceedings; Vol. 1406).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D

AU - Petty, C. C.

AU - Austin, M. E.

AU - Brennan, D. P.

AU - Burrell, K. H.

AU - Deboo, J. C.

AU - Doyle, E. J.

AU - Ferron, J. R.

AU - Garofalo, A. M.

AU - Hillesheim, J. C.

AU - Holcomb, C. T.

AU - Holland, C.

AU - Hyatt, A. W.

AU - In, Y.

AU - Jackson, G. L.

AU - Lohr, J.

AU - Luce, T. C.

AU - Makowski, M. A.

AU - Murakami, M.

AU - Okabayashi, M.

AU - Politzer, P. A.

AU - Prater, R.

AU - Reimerdes, H.

AU - Rhodes, T. L.

AU - Schmitz, L.

AU - Smith, S. P.

AU - Solomon, W. M.

AU - Staebler, G. M.

AU - Takahashi, R.

AU - Turco, F.

AU - Turnbull, A. D.

AU - Van Zeeland, M. A.

AU - Wang, G.

AU - White, A. E.

AU - Zeng, L.

PY - 2011

Y1 - 2011

N2 - High-power electron cyclotron (EC) waves are used to increase performance in several Advanced Tokamak (AT) regimes on DIII-D where there is a simultaneous need for high noninductive current and high beta. In the Quiescent High-confinement mode (QH-mode), a direct measurement of the electron cyclotron current drive (ECCD) profile is made using modulation techniques, and a trapped electron mode (TEM) dominated regime with core T e>T i is created. In the "highq min" AT scenario, ECCD provides part of the off-axis noninductive current and helps to produce a tearing stable equilibrium. In the hybrid regime, strong central current drive from EC waves and other sources increases the noninductive current fraction to ≈100%. Surprisingly, the core safety factor remains above unity, meaning good alignment between the current drive profile and the desired plasma current profile is not necessary in this scenario.

AB - High-power electron cyclotron (EC) waves are used to increase performance in several Advanced Tokamak (AT) regimes on DIII-D where there is a simultaneous need for high noninductive current and high beta. In the Quiescent High-confinement mode (QH-mode), a direct measurement of the electron cyclotron current drive (ECCD) profile is made using modulation techniques, and a trapped electron mode (TEM) dominated regime with core T e>T i is created. In the "highq min" AT scenario, ECCD provides part of the off-axis noninductive current and helps to produce a tearing stable equilibrium. In the hybrid regime, strong central current drive from EC waves and other sources increases the noninductive current fraction to ≈100%. Surprisingly, the core safety factor remains above unity, meaning good alignment between the current drive profile and the desired plasma current profile is not necessary in this scenario.

KW - ECCD

KW - noninductive current drive

KW - stability

KW - transport

UR - https://www.scopus.com/pages/publications/84863271186

U2 - 10.1063/1.3665023

DO - 10.1063/1.3665023

M3 - Conference contribution

AN - SCOPUS:84863271186

SN - 9780735409781

T3 - AIP Conference Proceedings

SP - 497

EP - 504

BT - Radio Frequency Power in Plasmas - Proceedings of the 19th Topical Conference

T2 - 19th Topical Conference on Radio Frequency Power in Plasmas

Y2 - 1 June 2011 through 3 July 2011

ER -

Contributions of electron cyclotron waves to performance in advanced regimes on DIII-D

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Keywords

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