Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas

Mordijck, S.; Rhodes, T. L.; Zeng, L.; Doyle, E. J.; Schmitz, L.; Chrystal, C.; Strait, T. J.; Moyer, R. A.

doi:10.1088/0741-3335/58/1/014003

Title: Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas

Journal Article · Tue Oct 20 00:00:00 EDT 2015 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/58/1/014003· OSTI ID:1460539

Mordijck, S. ^[1]; Rhodes, T. L. ^[2]; Zeng, L. ^[2]; Doyle, E. J. ^[2]; Schmitz, L. ^[2]; Chrystal, C. ^[3]; Strait, T. J. ^[4]; Moyer, R. A. ^[5]

College of William and Mary, Williamsburg, VA (United States)
Univ. of California, Los Angeles, CA (United States)
ORAU, Fredericksburg, VA (United States)
General Atomics, San Diego, CA (United States)
Univ. of California San Diego, La Jolla, CA (United States)

In this study we show that resonant magnetic perturbations (RMPs) affect the L- to H-mode power threshold. We find that during the L-mode phase, RMPs cause the particle pinch to reverse from traditionally inward to outward. As a result, the density at the plasma edge increases, while the density in the plasma core is reduced. Linear stability calculations indicate that the plasma transitions from an ion temperature gradient (ITG) to trapped electron mode (TEM) regime at the plasma edge. If the applied RMP current is below the threshold for penetration and island formation, we find that the changes in the edge radial electric field are minimal, while the carbon toroidal rotation brakes over the whole minor radius. Once the RMP field penetrates and the screening plasma response dissappears, the spin-up of the toroidal rotation at the plasma edge results in a positive radial electric field inside the separatrix.

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Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: FC02-04ER54698; FG02-08ER54984; SC0001961; SC0007880

OSTI ID:: 1460539

Alternate ID(s):: OSTI ID: 1238882

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 58, Issue 1; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Cited By (2)

Influence of resonant magnetic perturbations and induced islands on plasma rotations and turbulence properties in the J-TEXT tokamak Jiang, M.; Xu, Y.; Zhong, W. L. Nuclear Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1741-4326/aaf77d	journal	January 2019
DIII-D research towards establishing the scientific basis for future fusion reactors Petty, C. C. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab024a	journal	June 2019

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