Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions
- Chinese Academy of Sciences (CAS), Beijing (China). Key Lab. of Plasma Physics; Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Peking Univ., Beijing (China). Fusion Simulation Center
- Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Zhejiang Univ., Hangzhou (China). Inst. for Fusion Theory and Simulation
Linear properties of toroidal Alfvén eigenmode (TAE) is studied in global gyrokinetic particle simulations using both fast ion and antenna excitations. A synthetic antenna provides a precise measurement of the Alfvén continuum gap width and the TAE eigenmode frequency, damping rate, and mode structures. The measured gap width exhibits a linear dependence on the aspect ratio, in agreement to a local analytic theory. The TAE frequency and mode structure excited by fast ions show a significant radial symmetry breaking relative to the ideal magnetohydrodynamic theory due to the non-perturbative contributions from the fast ions. The electromagnetic capability of the global gyrokinetic toroidal code (GTC) is verified through these global gyrokinetic simulations of Alfvén eigenmode in cylindrical and toroidal geometries.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- OSTI ID:
- 1564857
- Journal Information:
- Physics of Plasmas, Vol. 19, Issue 2; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Verification of an energetic-electron-driven β -induced Alfvén eigenmode in the HL-2A tokamak
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journal | October 2019 |
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journal | October 2018 |
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