报告题目：Global properties of transonic plasma flow in the magnetic mirror
报告人：Andrei Smolyakov
报告时间：2026年5月21日星期四9:30 –11:30
报告地点：物理科技楼101室
报告摘要：It is shown that quasineutral ambipolar plasma acceleration in the converging-diverging mirror magnetic field follows the unique global solution which is fully defined by the magnetic field. Such solution, which was analytically obtained earlier in the paraxial approximation, is extended to arbitrary magnetic surface and compared here with results of the axisymmetric two-dimensional (r-z) magnetohydrodynamics simulations. The simulations with different length of the nozzle and different values of the boundary values for plasma velocity show that the plasma flow switches to the unique transonic acceleration profile via the shock-like transition in the velocity and pressure profiles. The simulations with arbitrary (non vacuum and not force-free ) initial magnetic field demonstrate the global adjustment of the magnetic field such that the transonic acceleration velocity profile follows the analytic predictions with the modified magnetic field.
报告人简介：Andrei Smolyakov is a Professor in the Department of Physics and Engineering Physics at the University of Saskatchewan, Canada. His research interests include basic plasma physics with applications to magnetic fusion, laboratory plasmas, and plasma for electric propulsion. He is a Fellow of American Physical Society, a member of the editorial boards for several plasma physics journals and serves as an Associate Editor for Physics of Plasmas.
