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Title: Scalings of energetic particle transport by ion temperature gradient microturbulence

Abstract

Transport scaling of energetic particles by ion temperature gradient microturbulence in magnetized plasmas is studied in massively paralleled gyrokinetic particle-in-cell simulations. Here, it is found that the diffusivity decreases drastically at high particles energy ( E) to plasma temperature ( T) ratio because of the averaging effects of the large gyroradius and drift-orbit width, and the fast wave-particle decorrelation. At high energy, the diffusivity follows a ( E/T) –1 scaling for purely passing particles, a ( E/T) –2 scaling for deeply trapped particles and a ( E/T) –1 scaling for particles with an isotropic velocity distribution since the diffusivity therein is contributed mostly by the passing particles.

Authors:
 [1];  [2];  [3];  [3];  [3];  [4]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Univ. of Science and Technology of China, Anhui (China). CAS Key Lab of Basic Plasma Physics
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  4. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Zhejiang Univ., Zhejiang (China). Inst. for Fusion Theory and Simulation
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1564693
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 17; Journal Issue: 5; 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; Physics

Citation Formats

Zhang, Wenlu, Decyk, Viktor, Holod, Ihor, Xiao, Yong, Lin, Zhihong, and Chen, Liu. Scalings of energetic particle transport by ion temperature gradient microturbulence. United States: N. p., 2010. Web. doi:10.1063/1.3379471.
Zhang, Wenlu, Decyk, Viktor, Holod, Ihor, Xiao, Yong, Lin, Zhihong, & Chen, Liu. Scalings of energetic particle transport by ion temperature gradient microturbulence. United States. doi:10.1063/1.3379471.
Zhang, Wenlu, Decyk, Viktor, Holod, Ihor, Xiao, Yong, Lin, Zhihong, and Chen, Liu. Fri . "Scalings of energetic particle transport by ion temperature gradient microturbulence". United States. doi:10.1063/1.3379471. https://www.osti.gov/servlets/purl/1564693.
@article{osti_1564693,
title = {Scalings of energetic particle transport by ion temperature gradient microturbulence},
author = {Zhang, Wenlu and Decyk, Viktor and Holod, Ihor and Xiao, Yong and Lin, Zhihong and Chen, Liu},
abstractNote = {Transport scaling of energetic particles by ion temperature gradient microturbulence in magnetized plasmas is studied in massively paralleled gyrokinetic particle-in-cell simulations. Here, it is found that the diffusivity decreases drastically at high particles energy (E) to plasma temperature (T) ratio because of the averaging effects of the large gyroradius and drift-orbit width, and the fast wave-particle decorrelation. At high energy, the diffusivity follows a (E/T)–1 scaling for purely passing particles, a (E/T)–2 scaling for deeply trapped particles and a (E/T)–1 scaling for particles with an isotropic velocity distribution since the diffusivity therein is contributed mostly by the passing particles.},
doi = {10.1063/1.3379471},
journal = {Physics of Plasmas},
number = 5,
volume = 17,
place = {United States},
year = {2010},
month = {5}
}

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Cited by: 18 works
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