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Abstracts

Author: Hua-sheng Xie
Requested Type: Poster
Submitted: 2016-12-15 20:47:20

Co-authors: Yi Zhang, Zicong Huang, Weike Ou, Bo Li

Contact Info:
School of Physics, Fusion Simulation Center, Pekin
School of Physics, Peking Univ
Beijing, Beijing   100871
China

Abstract Text:
A global gyro-kinetic particle-in-cell code (GKD) is developed to study the micro-instabilties driven turbulent transport for magnetic dipole configuration. This configuration is relevant to several experimental devices, such as LDX at MIT, CTX at Columbia University and HDX at Harbin Institute of Technology. The major electrostatic drift instability in this system is entropy mode, which can be unstable even when ideal interchange mode is stable. The local dispersion relation valid for arbitrary kperp*rhoi is derived to understand the instability properties in parameter space, such as density gradient, temperature gradient, ion and electron temperature ratio. A 1D linear PIC code is also developed to check the parallel dynamics. The results can be reduced from dipole to Z-pinch by changing the simulation domain.

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