Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating

M. A. Van Zeeland; W. W. Heidbrink; R. Nazikian; W. M. Solomon; M. E. Austin; H. L. Berk; N. N. Gorelenkov; C. T. Holcomb; A. W. Hyatt; G. J. Kramer; J. Lohr; M. A. Makowski; G. R. McKee; C. C. Petty; S. E. Sharapov; T. L. Rhodes

doi:10.1088/0741-3335/50/3/035009

Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating

M. A. Van Zeeland, W. W. Heidbrink, R. Nazikian, W. M. Solomon, M. E. Austin, H. L. Berk, N. N. Gorelenkov, C. T. Holcomb, A. W. Hyatt, G. J. Kramer, J. Lohr, M. A. Makowski, G. R. McKee, C. C. Petty, S. E. Sharapov, T. L. Rhodes

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52 Scopus citations

Abstract

Reversed shear Alfvén eigenmode (RSAE) activity in DIII-D is stabilized by electron cyclotron heating (ECH) applied near the minimum of the magnetic safety factor (q_min) in neutral beam heated discharges with reversed-magnetic shear. The degree of RSAE stabilization, fast ion density and the volume averaged neutron production (S_n) are highly dependent on ECH deposition location relative to q_min. While discharges with ECH stabilization of RSAEs have higher S_n and more peaked fast ion profiles than discharges with significant RSAE activity, neutron production remains strongly reduced (up to 60% relative to TRANSP predictions assuming classical fast ion transport) even when RSAEs are stabilized.

Original language	English (US)
Article number	035009
Journal	Plasma Physics and Controlled Fusion
Volume	50
Issue number	3
DOIs	https://doi.org/10.1088/0741-3335/50/3/035009
State	Published - Mar 1 2008

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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10.1088/0741-3335/50/3/035009

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Van Zeeland, M. A., Heidbrink, W. W., Nazikian, R., Solomon, W. M., Austin, M. E., Berk, H. L., Gorelenkov, N. N., Holcomb, C. T., Hyatt, A. W., Kramer, G. J., Lohr, J., Makowski, M. A., McKee, G. R., Petty, C. C., Sharapov, S. E., & Rhodes, T. L. (2008). Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating. Plasma Physics and Controlled Fusion, 50(3), Article 035009. https://doi.org/10.1088/0741-3335/50/3/035009

@article{5dd4ab7549714b80bbea5a283395caa4,

title = "Reversed shear Alfv{\'e}n eigenmode stabilization by localized electron cyclotron heating",

abstract = "Reversed shear Alfv{\'e}n eigenmode (RSAE) activity in DIII-D is stabilized by electron cyclotron heating (ECH) applied near the minimum of the magnetic safety factor (qmin) in neutral beam heated discharges with reversed-magnetic shear. The degree of RSAE stabilization, fast ion density and the volume averaged neutron production (Sn) are highly dependent on ECH deposition location relative to qmin. While discharges with ECH stabilization of RSAEs have higher Sn and more peaked fast ion profiles than discharges with significant RSAE activity, neutron production remains strongly reduced (up to 60\% relative to TRANSP predictions assuming classical fast ion transport) even when RSAEs are stabilized.",

author = "\{Van Zeeland\}, \{M. A.\} and Heidbrink, \{W. W.\} and R. Nazikian and Solomon, \{W. M.\} and Austin, \{M. E.\} and Berk, \{H. L.\} and Gorelenkov, \{N. N.\} and Holcomb, \{C. T.\} and Hyatt, \{A. W.\} and Kramer, \{G. J.\} and J. Lohr and Makowski, \{M. A.\} and McKee, \{G. R.\} and Petty, \{C. C.\} and Sharapov, \{S. E.\} and Rhodes, \{T. L.\}",

year = "2008",

month = mar,

day = "1",

doi = "10.1088/0741-3335/50/3/035009",

language = "English (US)",

volume = "50",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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Van Zeeland, MA, Heidbrink, WW, Nazikian, R, Solomon, WM, Austin, ME, Berk, HL, Gorelenkov, NN, Holcomb, CT, Hyatt, AW, Kramer, GJ, Lohr, J, Makowski, MA, McKee, GR, Petty, CC, Sharapov, SE & Rhodes, TL 2008, 'Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating', Plasma Physics and Controlled Fusion, vol. 50, no. 3, 035009. https://doi.org/10.1088/0741-3335/50/3/035009

TY - JOUR

T1 - Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating

AU - Van Zeeland, M. A.

AU - Heidbrink, W. W.

AU - Nazikian, R.

AU - Solomon, W. M.

AU - Austin, M. E.

AU - Berk, H. L.

AU - Gorelenkov, N. N.

AU - Holcomb, C. T.

AU - Hyatt, A. W.

AU - Kramer, G. J.

AU - Lohr, J.

AU - Makowski, M. A.

AU - McKee, G. R.

AU - Petty, C. C.

AU - Sharapov, S. E.

AU - Rhodes, T. L.

PY - 2008/3/1

Y1 - 2008/3/1

N2 - Reversed shear Alfvén eigenmode (RSAE) activity in DIII-D is stabilized by electron cyclotron heating (ECH) applied near the minimum of the magnetic safety factor (qmin) in neutral beam heated discharges with reversed-magnetic shear. The degree of RSAE stabilization, fast ion density and the volume averaged neutron production (Sn) are highly dependent on ECH deposition location relative to qmin. While discharges with ECH stabilization of RSAEs have higher Sn and more peaked fast ion profiles than discharges with significant RSAE activity, neutron production remains strongly reduced (up to 60% relative to TRANSP predictions assuming classical fast ion transport) even when RSAEs are stabilized.

AB - Reversed shear Alfvén eigenmode (RSAE) activity in DIII-D is stabilized by electron cyclotron heating (ECH) applied near the minimum of the magnetic safety factor (qmin) in neutral beam heated discharges with reversed-magnetic shear. The degree of RSAE stabilization, fast ion density and the volume averaged neutron production (Sn) are highly dependent on ECH deposition location relative to qmin. While discharges with ECH stabilization of RSAEs have higher Sn and more peaked fast ion profiles than discharges with significant RSAE activity, neutron production remains strongly reduced (up to 60% relative to TRANSP predictions assuming classical fast ion transport) even when RSAEs are stabilized.

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DO - 10.1088/0741-3335/50/3/035009

M3 - Article

AN - SCOPUS:43049098947

SN - 0741-3335

VL - 50

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 3

M1 - 035009

ER -

Reversed shear Alfvén eigenmode stabilization by localized electron cyclotron heating

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