Excitation of fishbone-like mode in tokamaks due to bounce resonances of trapped thermal ions
Abstract
When the drift kinetic effect of thermal ions is taken into account, a high-frequency fishbone-like mode (FLM) is found to be driven unstable by trapped thermal ions (TTIs) in tokamak plasmas, according to self-consistent magneto-hydrodynamic (MHD)-kinetic hybrid modeling utilizing the MARS-K code [Liu et al., Phys. Plasmas 15, 112503 (2008)] as well as an analytic theory. It is found that, similar to energetic particles, TTIs can also stabilize the internal kink mode, whereas the FLM is excited when the effective beta of TTIs exceeds a threshold value. The real frequency of the FLM is comparable to the bounce frequency of TTIs. The mode structure of the FLM can be significantly different from the conventional step-like function for the associated plasma radial displacement. This drift kinetic induced modification of the mode structure near the q = 1 surface is captured by non-perturbative MHD-kinetic hybrid computations with MARS-K. Furthermore, the FLM can only be triggered by TTIs at sufficiently high thermal temperatures. Both the FLM and the internal kink can be stabilized by sufficiently fast plasma toroidal rotation and parallel sound wave damping. These two conditions of high thermal temperature and (fast) flow stabilization, though making it challenging to observe the TTI-drivenmore »
- Authors:
-
[1];
[2];
- Southwestern Inst. of Physics, Chengdu (China)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); ITER-CN; National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1850102
- Alternate Identifier(s):
- OSTI ID: 1774710
- Grant/Contract Number:
- FG02-95ER54309; 2019YFE03050003; 2018YFE030410; 11775067; 11705050
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 4; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Science & Technology - Other Topics; Materials Science; Physics
Citation Formats
Xie, Weichao, Liu, Yueqiang, Hao, G. Z., Ma, Ruirui, and Chen, Qian. Excitation of fishbone-like mode in tokamaks due to bounce resonances of trapped thermal ions. United States: N. p., 2021.
Web. doi:10.1063/5.0044341.
Xie, Weichao, Liu, Yueqiang, Hao, G. Z., Ma, Ruirui, & Chen, Qian. Excitation of fishbone-like mode in tokamaks due to bounce resonances of trapped thermal ions. United States. https://doi.org/10.1063/5.0044341
Xie, Weichao, Liu, Yueqiang, Hao, G. Z., Ma, Ruirui, and Chen, Qian. Wed .
"Excitation of fishbone-like mode in tokamaks due to bounce resonances of trapped thermal ions". United States. https://doi.org/10.1063/5.0044341. https://www.osti.gov/servlets/purl/1850102.
@article{osti_1850102,
title = {Excitation of fishbone-like mode in tokamaks due to bounce resonances of trapped thermal ions},
author = {Xie, Weichao and Liu, Yueqiang and Hao, G. Z. and Ma, Ruirui and Chen, Qian},
abstractNote = {When the drift kinetic effect of thermal ions is taken into account, a high-frequency fishbone-like mode (FLM) is found to be driven unstable by trapped thermal ions (TTIs) in tokamak plasmas, according to self-consistent magneto-hydrodynamic (MHD)-kinetic hybrid modeling utilizing the MARS-K code [Liu et al., Phys. Plasmas 15, 112503 (2008)] as well as an analytic theory. It is found that, similar to energetic particles, TTIs can also stabilize the internal kink mode, whereas the FLM is excited when the effective beta of TTIs exceeds a threshold value. The real frequency of the FLM is comparable to the bounce frequency of TTIs. The mode structure of the FLM can be significantly different from the conventional step-like function for the associated plasma radial displacement. This drift kinetic induced modification of the mode structure near the q = 1 surface is captured by non-perturbative MHD-kinetic hybrid computations with MARS-K. Furthermore, the FLM can only be triggered by TTIs at sufficiently high thermal temperatures. Both the FLM and the internal kink can be stabilized by sufficiently fast plasma toroidal rotation and parallel sound wave damping. These two conditions of high thermal temperature and (fast) flow stabilization, though making it challenging to observe the TTI-driven FLM in present day experiments, are favorable for the mode excitation in future reactor scale devices.},
doi = {10.1063/5.0044341},
journal = {AIP Advances},
number = 4,
volume = 11,
place = {United States},
year = {Wed Apr 07 00:00:00 EDT 2021},
month = {Wed Apr 07 00:00:00 EDT 2021}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Cancellation of drift kinetic effects between thermal and energetic particles on the resistive wall mode stabilization
journal, June 2016
- Guo, S. C.; Liu, Y. Q.; Xu, X. Y.
- Nuclear Fusion, Vol. 56, Issue 7
Non-resonant magnetic braking on JET and TEXTOR
journal, July 2012
- Sun, Y.; Liang, Y.; Shaing, K. C.
- Nuclear Fusion, Vol. 52, Issue 8
Kinetic calculation of the resistive wall mode and fishbone-like mode instability in tokamak
journal, June 2016
- Hao, G. Z.; Yang, S. X.; Liu, Y. Q.
- Physics of Plasmas, Vol. 23, Issue 6
Excitation of the toroidicity‐induced shear Alfvén eigenmode by fusion alpha particles in an ignited tokamak
journal, October 1989
- Fu, G. Y.; Van Dam, J. W.
- Physics of Fluids B: Plasma Physics, Vol. 1, Issue 10
Alpha particle destabilization of the toroidicity‐induced Alfvén eigenmodes
journal, September 1991
- Cheng, C. Z.
- Physics of Fluids B: Plasma Physics, Vol. 3, Issue 9
Observation of spontaneous neoclassical tearing modes
journal, February 2002
- Fredrickson, E. D.
- Physics of Plasmas, Vol. 9, Issue 2
Toroidal modeling of thermal particle drift kinetic effects and sub-sonic plasma flow on internal kink mode
journal, October 2019
- Wu, Tingting; Liu, Yueqiang; Liu, Yue
- Physics of Plasmas, Vol. 26, Issue 10
The effect of toroidal plasma rotation on sawteeth in MAST
journal, October 2006
- Chapman, I. T.; Hender, T. C.; Saarelma, S.
- Nuclear Fusion, Vol. 46, Issue 12
Excitation of Internal Kink Modes by Trapped Energetic Beam Ions
journal, March 1984
- Chen, Liu; White, R. B.; Rosenbluth, M. N.
- Physical Review Letters, Vol. 52, Issue 13
Trapped particle destabilization of the internal kink mode
journal, January 1985
- White, R. B.; Chen, L.; Romanelli, F.
- Physics of Fluids, Vol. 28, Issue 1
Study of kinetic shear Alfvén instability in tokamak plasmas
journal, March 2004
- Dong, J. Q.; Chen, L.; Zonca, F.
- Physics of Plasmas, Vol. 11, Issue 3
The interaction between fishbone modes and shear Alfvén waves in tokamak plasmas
journal, April 2016
- He, Hongda; Liu, Yueqiang; Dong, J. Q.
- Nuclear Fusion, Vol. 56, Issue 5
Importance of centrifugal effects for the internal kink mode stability in toroidally rotating tokamak plasmas
journal, November 2009
- Wahlberg, C.; Chapman, I. T.; Graves, J. P.
- Physics of Plasmas, Vol. 16, Issue 11
Trapped ion temperature gradient driven instabilities with bounce resonance
journal, October 1995
- Li, J. Q.; Huang, L.; Ding, H. C.
- Physics of Plasmas, Vol. 2, Issue 10
Toroidal Alfvén eigenmode triggered by trapped anisotropic energetic particles in a toroidal resistive plasma with free boundary
journal, February 2018
- Yang, S. X.; Hao, G. Z.; Liu, Y. Q.
- Nuclear Fusion, Vol. 58, Issue 4
The role of kinetic effects, including plasma rotation and energetic particles, in resistive wall mode stability
journal, August 2010
- Berkery, J. W.; Sabbagh, S. A.; Reimerdes, H.
- Physics of Plasmas, Vol. 17, Issue 8
‘BAAE’ instabilities observed without fast ion drive
journal, December 2020
- Heidbrink, W. W.; Van Zeeland, M. A.; Austin, M. E.
- Nuclear Fusion, Vol. 61, Issue 1
Magnetic drift kinetic damping of the resistive wall mode in large aspect ratio tokamaks
journal, September 2008
- Liu, Yueqiang; Chu, M. S.; Gimblett, C. G.
- Physics of Plasmas, Vol. 15, Issue 9
High-n ideal and resistive shear Alfvén waves in tokamaks
journal, April 1985
- Cheng, C. Z.; Chen, Liu; Chance, M. S.
- Annals of Physics, Vol. 161, Issue 1
Interaction of fast particles with neoclassical tearing modes
journal, March 2000
- Sesnic, S.; Günter, S.; Gude, A.
- Physics of Plasmas, Vol. 7, Issue 3
Resonant interaction of tearing modes with energetic-ions resulting in fishbone activities on HL-2A
journal, August 2019
- Chen, W.; Zhu, X. L.; Wang, F.
- Nuclear Fusion, Vol. 59, Issue 9
Toroidal self-consistent modeling of drift kinetic effects on the resistive wall mode
journal, November 2008
- Liu, Yueqiang; Chu, M. S.; Chapman, I. T.
- Physics of Plasmas, Vol. 15, Issue 11
Stability of the resistive wall mode in JET
journal, March 2009
- Chapman, I. T.; Gimblett, C. G.; Gryaznevich, M. P.
- Plasma Physics and Controlled Fusion, Vol. 51, Issue 5
Bounce precession fishbones in the national spherical torus experiment
journal, October 2003
- Fredrickson, Eric; Chen, Liu; White, Roscoe
- Nuclear Fusion, Vol. 43, Issue 10