RUI: Role of Nonlinear Cross-Field Diffusion in Solar Modulation of Galactic and Anomalous Cosmic Rays

研究人员利用新开发的标准宇宙线输运方程的完全与时间相关的三维数值解，研究了非线性交叉场扩散在整个日光层的完全时间调制通量中的作用。利用对非线性交叉场扩散的刚性敏感估计，他批判性地评估了增强交叉场扩散的漂移抑制作用。该项目与日球层科学和高能粒子研究有关，源于对宇宙线调制的理解增加，宇宙线调制是一种非线性元素，在其他磁湍流研究中具有深远的意义。这一新元素还可能有利于空间和天体物理等离子体湍流的研究，如宇宙线星系传输和扩散激波加速。

The investigator examines the role of nonlinear cross field diffusion in quite-time modulated flux throughout the heliosphere, using a newly developed fully time-dependent, three dimensional numerical solution of the standard cosmic ray transport equation. Using a rigidity-sensitive estimate of nonlinear cross-field diffusion, he critically evaluates a drift-suppressing role of enhanced cross-field diffusion. The project is relevant to heliospheric science and energetic particle studies, stemming from an increased understanding of cosmic ray modulation, a nonlinear element having profound implication in other magnetic turbulence studies. This new element also potentially benefits space and astrophysical plasma turbulence studies, like cosmic ray galactic transport and diffusive shock acceleration.