Effects of variations in electron thermal velocity on the whistler anisotropy instability: Particle-in-cell simulations
作者： R. Scott Hughes , Joseph Wang , Viktor K. Decyk , S. Peter Gary
DOI: 10.1063/1.4945748
关键词: Thermal velocity 、 Condensed matter physics 、 Particle-in-cell 、 Magnetic field 、 Whistler 、 Electron 、 Solar wind 、 Instability 、 Physics 、 Anisotropy
摘要: This paper investigates how the physics of whistler anisotropy instability (WAI) is affected by variations in electron thermal velocity vte, referred to here terms ratio vte=vte/c, where c speed light. The WAI driven condition RT>1, RT=Te⊥/Te∥ temperature and ⊥/∥ signify directions perpendicular/parallel background magnetic field B0. While a typical value vte solar wind ∼0.005, electromagnetic (EM) particle-in-cell (PIC) simulations often use near 0.1 order maximize computational time step. In this study, two-dimensional (2D) Darwin (DPIC) code, MDPIC2, used. step DPIC model not choice making suited for study. A series are carried out under that βe held fixed, while varied over range 0.1≥vte≥0.025. results show that, with linear dispers...
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