Gyrokinetic particle simulation of microturbulence for general magnetic geometry and experimental profiles

Xiao, Yong; Holod, Ihor; Wang, Zhixuan; Lin, Zhihong; Zhang, Taige

doi:10.1063/1.4908275

Title: Gyrokinetic particle simulation of microturbulence for general magnetic geometry and experimental profiles

Journal Article · Wed Feb 25 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4908275· OSTI ID:1565339

Xiao, Yong ^[1]; Holod, Ihor ^[2];

^[2];

^[3]; Zhang, Taige ^[4]

Zhejiang Univ., Hangzhou (China); Univ. of California, Irvine, CA (United States)
Univ. of California, Irvine, CA (United States)
Univ. of California, Irvine, CA (United States); Peking Univ., Beijing (China)
Zhejiang Univ., Hangzhou (China)

Developments in gyrokinetic particle simulation enable the gyrokinetic toroidal code (GTC) to simulate turbulent transport in tokamaks with realistic equilibrium profiles and plasma geometry, which is an essential step in the code–experiment validation process. These novel developments include numerical equilibrium representation using B-splines, a new Poisson solver based on finite difference using field-aligned mesh and magnetic flux coordinates, a new zonal flow solver for general geometry, and improvements on the conventional four-point gyroaverage with nonuniform background marker loading. The gyrokinetic Poisson equation is solved in the perpendicular plane instead of the poloidal plane. Exploiting these new features, GTC is able to simulate a typical DIII-D discharge with experimental magnetic geometry and profiles. The simulated turbulent heat diffusivity and its radial profile reflects good agreement with other gyrokinetic codes. The newly developed nonuniform loading method provides a modified radial transport profile to that of the conventional uniform loading method.

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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), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)

Grant/Contract Number:: 2011GB105001; 2013GB111000; 91130031

OSTI ID:: 1565339

Journal Information:: Physics of Plasmas, Vol. 22, Issue 2; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 39 works

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