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

Rhen, Zhen -Zhen; Fu, G. Y.; Van Zeeland, M. A.; Wang, Feng; Wang, Zheng -Xiong; Nazikian, R.; Turco, F.; Petty, C. C.

doi:10.1063/1.5064647

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

Journal Article · Thu Dec 13 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5064647· OSTI ID:1462438

Rhen, Zhen -Zhen ^[1]; Fu, G. Y. ^[2]; Van Zeeland, M. A. ^[3]; Wang, Feng ^[4]; Wang, Zheng -Xiong ^[4]; Nazikian, R. ^[5]; Turco, F. ^[6]; Petty, C. C. ^[3]

Dalian Univ. of Technology, Dalian (China); General Atomics
Zhejiang Univ., Zhejiang (China)
General Atomics, San Diego, CA (United States)
Dalian Univ. of Technology, Dalian (China)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Columbia Univ., New York, NY (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Dalian Univ. of Technology (China); General Atomics, San Diego, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Zhejiang Univ., Hangzhou (China)

Sponsoring Organization:: Dalian Youth Science and Technology Project Support Program (China); Fundamental Research Funds for the Central Universities (China); National Key R&D Program of China; National Natural Science Foundation of China (NSFC); USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1462438

Alternate ID(s):: OSTI ID: 1490156

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 25; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Stability of Alfvén eigenmodes in the China Fusion Engineering Test Reactor Ren, Zhen-Zhen; Chen, Yang; Fu, G. Y. Nuclear Fusion, Vol. 60, Issue 1 https://doi.org/10.1088/1741-4326/ab4871	journal	October 2019

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

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