Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas
Abstract
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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1460539
- Alternate Identifier(s):
- OSTI ID: 1238882
- Grant/Contract Number:
- FC02-04ER54698; FG02-08ER54984; SC0001961; SC0007880
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 58; Journal Issue: 1; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tokamaks; turbulence; transport; RMPs
Citation Formats
Mordijck, S., Rhodes, T. L., Zeng, L., Doyle, E. J., Schmitz, L., Chrystal, C., Strait, T. J., and Moyer, R. A. Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas. United States: N. p., 2015.
Web. doi:10.1088/0741-3335/58/1/014003.
Mordijck, S., Rhodes, T. L., Zeng, L., Doyle, E. J., Schmitz, L., Chrystal, C., Strait, T. J., & Moyer, R. A. Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas. United States. https://doi.org/10.1088/0741-3335/58/1/014003
Mordijck, S., Rhodes, T. L., Zeng, L., Doyle, E. J., Schmitz, L., Chrystal, C., Strait, T. J., and Moyer, R. A. Tue .
"Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas". United States. https://doi.org/10.1088/0741-3335/58/1/014003. https://www.osti.gov/servlets/purl/1460539.
@article{osti_1460539,
title = {Effects of resonant magnetic perturbations on turbulence and transport in DIII-D L-mode plasmas},
author = {Mordijck, S. and Rhodes, T. L. and Zeng, L. and Doyle, E. J. and Schmitz, L. and Chrystal, C. and Strait, T. J. and Moyer, R. A.},
abstractNote = {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.},
doi = {10.1088/0741-3335/58/1/014003},
journal = {Plasma Physics and Controlled Fusion},
number = 1,
volume = 58,
place = {United States},
year = {Tue Oct 20 00:00:00 EDT 2015},
month = {Tue Oct 20 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Influence of resonant magnetic perturbations and induced islands on plasma rotations and turbulence properties in the J-TEXT tokamak
journal, January 2019
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- Nuclear Fusion, Vol. 59, Issue 4
DIII-D research towards establishing the scientific basis for future fusion reactors
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