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Title: Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak

Abstract

In DIII-D hybrid discharges, the intense Alfvén eigenmode (AE) activity driven by Neutral Beam Injection (NBI) that is typically observed can be suppressed and replaced by fishbone modes when Electron Cyclotron Current Drive (ECCD) is centrally applied. Simulations have been carried out with the kinetic/magnetohydrodynamic (MHD) hybrid code M3D-K based on DIII-D discharges #161401 and #161403 without and with ECCD, respectively. In both cases unstable modes are found – the mode frequency and mode structure indicate the instability excited in #161403 is of fishbone type, while that in #161401 is identified as the beta-induced Alfvén eigenmode (BAE)-like mode. Moreover, we find that the calculated mode frequencies of these two shots are consistent with experimental observations.

Authors:
 [1];  [2];  [3];  [1];  [1];  [4];  [5];  [3]
  1. Dalian Univ. of Technology, Dalian (China)
  2. Zhejiang Univ., Zhejiang (China)
  3. General Atomics, San Diego, CA (United States)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  5. Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Dalian Univ. of Technology (China); Zhejiang Univ., Hangzhou (China)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); National Key R&D Program of China; National Natural Science Foundation of China (NNSFC); Fundamental Research Funds for the Central Universities (China); Dalian Youth Science and Technology Project Support Program (China)
OSTI Identifier:
1490156
Alternate Identifier(s):
OSTI ID: 1462438
Grant/Contract Number:  
FC02-04ER54698; 2017YFE0301900; 11675083; DUT18ZD101; 2015R01
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 12; 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; Alfvén eigenmode; fishbone instability; DIII-D; ECCD; energetic particle; magnetohydrodynamics; plasma waves; plasma confinement; computer programming; magnetic confinement fusion; tokamaks; magnetic confinement device

Citation Formats

Rhen, Zhen -Zhen, Fu, G. Y., Van Zeeland, M. A., Wang, Feng, Wang, Zheng -Xiong, Nazikian, R., Turco, F., and Petty, C. C. Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak. United States: N. p., 2018. Web. doi:10.1063/1.5064647.
Rhen, Zhen -Zhen, Fu, G. Y., Van Zeeland, M. A., Wang, Feng, Wang, Zheng -Xiong, Nazikian, R., Turco, F., & Petty, C. C. Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak. United States. doi:10.1063/1.5064647.
Rhen, Zhen -Zhen, Fu, G. Y., Van Zeeland, M. A., Wang, Feng, Wang, Zheng -Xiong, Nazikian, R., Turco, F., and Petty, C. C. Thu . "Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak". United States. doi:10.1063/1.5064647.
@article{osti_1490156,
title = {Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak},
author = {Rhen, Zhen -Zhen and Fu, G. Y. and Van Zeeland, M. A. and Wang, Feng and Wang, Zheng -Xiong and Nazikian, R. and Turco, F. and Petty, C. C.},
abstractNote = {In DIII-D hybrid discharges, the intense Alfvén eigenmode (AE) activity driven by Neutral Beam Injection (NBI) that is typically observed can be suppressed and replaced by fishbone modes when Electron Cyclotron Current Drive (ECCD) is centrally applied. Simulations have been carried out with the kinetic/magnetohydrodynamic (MHD) hybrid code M3D-K based on DIII-D discharges #161401 and #161403 without and with ECCD, respectively. In both cases unstable modes are found – the mode frequency and mode structure indicate the instability excited in #161403 is of fishbone type, while that in #161401 is identified as the beta-induced Alfvén eigenmode (BAE)-like mode. Moreover, we find that the calculated mode frequencies of these two shots are consistent with experimental observations.},
doi = {10.1063/1.5064647},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 12,
volume = 25,
place = {United States},
year = {2018},
month = {12}
}

Journal Article:
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Works referenced in this record:

Nonlinear fishbone dynamics in spherical tokamaks
journal, November 2016