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Title: Multiple branches of resistive wall mode instability in a resistive plasma

Abstract

The resistive wall mode (RWM) instability is numerically investigated for a toroidal resistive plasma, with results compared to those of an analytic cylindrical model. The full toroidal code MARS-F [Liu et al., Phys. Plasmas 7, 3681 (2000)] is applied for a computational study. The results indicate that there are two branches of unstable RWMs, when the toroidal favorable average curvature effect (the GGJ effect) is taken into account in the resistive layer. In addition, the GGJ physics not only directly affects the mode growth rate, but also indirectly modifies the mode stability by changing the continuum damping through modifying the mode frequency in the plasma frame. Furthermore, the plasma resistivity can either stabilize or destabilize the RWM, depending on the regime of key plasma parameters (e.g., the plasma rotation). Similarly, the plasma rotation can stabilize or destabilize the RWM, depending on the plasma resistivity. These numerical results from MARS-F are qualitatively confirmed by an analytic theory model which includes the GGJ effect.

Authors:
 [1];  [2];  [3]; ORCiD logo [1];  [1];  [4];  [4];  [4]
  1. Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China
  2. General Atomics, P. O. Box 85608, San Diego, California 92186-5608, USA; Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China
  3. Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China; University of California, Irvine, California 92697, USA
  4. Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041, China
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1540134
Grant/Contract Number:  
FC02-04ER54698; FG02-95ER54309
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
Physics

Citation Formats

Yang, S. X., Liu, Y. Q., Hao, G. Z., Wang, Z. X., He, Y. L., He, H. D., Wang, A. K., and Xu, M. Multiple branches of resistive wall mode instability in a resistive plasma. United States: N. p., 2018. Web. doi:10.1063/1.5007819.
Yang, S. X., Liu, Y. Q., Hao, G. Z., Wang, Z. X., He, Y. L., He, H. D., Wang, A. K., & Xu, M. Multiple branches of resistive wall mode instability in a resistive plasma. United States. doi:10.1063/1.5007819.
Yang, S. X., Liu, Y. Q., Hao, G. Z., Wang, Z. X., He, Y. L., He, H. D., Wang, A. K., and Xu, M. Mon . "Multiple branches of resistive wall mode instability in a resistive plasma". United States. doi:10.1063/1.5007819. https://www.osti.gov/servlets/purl/1540134.
@article{osti_1540134,
title = {Multiple branches of resistive wall mode instability in a resistive plasma},
author = {Yang, S. X. and Liu, Y. Q. and Hao, G. Z. and Wang, Z. X. and He, Y. L. and He, H. D. and Wang, A. K. and Xu, M.},
abstractNote = {The resistive wall mode (RWM) instability is numerically investigated for a toroidal resistive plasma, with results compared to those of an analytic cylindrical model. The full toroidal code MARS-F [Liu et al., Phys. Plasmas 7, 3681 (2000)] is applied for a computational study. The results indicate that there are two branches of unstable RWMs, when the toroidal favorable average curvature effect (the GGJ effect) is taken into account in the resistive layer. In addition, the GGJ physics not only directly affects the mode growth rate, but also indirectly modifies the mode stability by changing the continuum damping through modifying the mode frequency in the plasma frame. Furthermore, the plasma resistivity can either stabilize or destabilize the RWM, depending on the regime of key plasma parameters (e.g., the plasma rotation). Similarly, the plasma rotation can stabilize or destabilize the RWM, depending on the plasma resistivity. These numerical results from MARS-F are qualitatively confirmed by an analytic theory model which includes the GGJ effect.},
doi = {10.1063/1.5007819},
journal = {Physics of Plasmas},
number = 1,
volume = 25,
place = {United States},
year = {2018},
month = {1}
}

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