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Title: Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D

Abstract

Here, DIII-D experiments using new detailed magnetic measurements show that linear, single-fluid ideal magnetohydrodynamics (MHD) theory accurately describes the external structure of three-dimensional equilibria at low beta, providing a validated basis on which to exploit 3D fields for plasma control. At higher beta near the ideal kink mode stability limit, the measured structure shows contributions by multiple stable eigenmodes, in qualitative agreement with the kinetic extension of ideal MHD. These detailed comparisons provide the first evidence of the simultaneous stimulation of an internal and external kink from a single perturbing field implying that non-axisymmetric coil design for a high beta tokamak power plant will require careful optimization of the poloidal spectrum.

Authors:
 [1];  [2]; ORCiD logo [3];  [2];  [3];  [4];  [3];  [5];  [2];  [6];  [3];  [3];  [2];  [7]; ORCiD logo [2]
  1. Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States); General Atomics, San Diego, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Australian National Univ., Canberra, ACT (Australia)
  5. Columbia Univ., New York, NY (United States)
  6. Culham Science Centre, Abingdon (United Kingdom). Plasma Research Lab.
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); General Atomics, San Diego, CA (United States). DIII-D National Fusion Facility (DIII-D)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
OSTI Identifier:
1295127
Alternate Identifier(s):
OSTI ID: 1228332; OSTI ID: 1459669
Grant/Contract Number:  
AC05-00OR22725; FC02-04ER54698; AC05-06OR23100; AC02-09CH11466; FG02-04ER54761; AC05-00OR23100; FC02-04ER5469
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 7; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

King, Josh D., Strait, Edward J., Lazerson, Samuel A., Ferraro, Nathaniel M., Logan, Nikolas C., Haskey, Shaun R., Park, Jong -Kyu, Hanson, Jeremy M., Lanctot, Matthew J., Liu, Yueqiang, Nazikian, Raffi, Okabayashi, Michio, Paz-Soldan, Carlos A., Shiraki, Daisuke, and Turnbull, Alan D. Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D. United States: N. p., 2015. Web. doi:10.1063/1.4923017.
King, Josh D., Strait, Edward J., Lazerson, Samuel A., Ferraro, Nathaniel M., Logan, Nikolas C., Haskey, Shaun R., Park, Jong -Kyu, Hanson, Jeremy M., Lanctot, Matthew J., Liu, Yueqiang, Nazikian, Raffi, Okabayashi, Michio, Paz-Soldan, Carlos A., Shiraki, Daisuke, & Turnbull, Alan D. Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D. United States. doi:https://doi.org/10.1063/1.4923017
King, Josh D., Strait, Edward J., Lazerson, Samuel A., Ferraro, Nathaniel M., Logan, Nikolas C., Haskey, Shaun R., Park, Jong -Kyu, Hanson, Jeremy M., Lanctot, Matthew J., Liu, Yueqiang, Nazikian, Raffi, Okabayashi, Michio, Paz-Soldan, Carlos A., Shiraki, Daisuke, and Turnbull, Alan D. Wed . "Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D". United States. doi:https://doi.org/10.1063/1.4923017. https://www.osti.gov/servlets/purl/1295127.
@article{osti_1295127,
title = {Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D},
author = {King, Josh D. and Strait, Edward J. and Lazerson, Samuel A. and Ferraro, Nathaniel M. and Logan, Nikolas C. and Haskey, Shaun R. and Park, Jong -Kyu and Hanson, Jeremy M. and Lanctot, Matthew J. and Liu, Yueqiang and Nazikian, Raffi and Okabayashi, Michio and Paz-Soldan, Carlos A. and Shiraki, Daisuke and Turnbull, Alan D.},
abstractNote = {Here, DIII-D experiments using new detailed magnetic measurements show that linear, single-fluid ideal magnetohydrodynamics (MHD) theory accurately describes the external structure of three-dimensional equilibria at low beta, providing a validated basis on which to exploit 3D fields for plasma control. At higher beta near the ideal kink mode stability limit, the measured structure shows contributions by multiple stable eigenmodes, in qualitative agreement with the kinetic extension of ideal MHD. These detailed comparisons provide the first evidence of the simultaneous stimulation of an internal and external kink from a single perturbing field implying that non-axisymmetric coil design for a high beta tokamak power plant will require careful optimization of the poloidal spectrum.},
doi = {10.1063/1.4923017},
journal = {Physics of Plasmas},
number = 7,
volume = 22,
place = {United States},
year = {2015},
month = {7}
}

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Cited by: 17 works
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