Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions

Zhang, Wenlu; Holod, Ihor; Lin, Zhihong; Xiao, Yong

doi:10.1063/1.3685703

Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions

Journal Article · Wed Feb 22 00:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3685703· OSTI ID:1564857

Zhang, Wenlu ^[1]; Holod, Ihor ^[2]; Lin, Zhihong ^[3]; Xiao, Yong ^[4]

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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (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, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 19; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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