開催報告：5月22日　日米高エネルギー密度科学セミナー（Speaker: Dr. Dr. Justin Angus, LLNL）

日米高エネルギー密度科学セミナーが5月22日 8:30am（日本時間）からオンラインにて開催されました。
講　　師：　Dr. Justin Angus（LLNL)
タイトル：　A fully implicit particle code for dynamically compressing plasmas: Solver implementation and applications

————————————

–Speaker–
Dr. Justin Angus
Lawrence Livermore National Laboratory (LLNL)

–Title–
A fully implicit particle code for dynamically compressing plasmas: Solver implementation and applications

–Abstract–
Dynamic compression of a plasma is a phenomenon that is common in both astrophysical and laboratory plasmas. Examples of the latter include dynamic Z-pinch and inertial confinement fusion (ICF) experiments. These plasmas typically display a large variation of parameters (spatially and temporally) and are characterized as dense at stagnation. In this work, a collisional particle code based on implicit energy- and charge-conserving methods is developed and used to perform fully kinetic studies of dynamically compressing plasmas. The algorithm is ideally suited to study dense plasmas because 1) it can ePiciently use time steps larger than the plasma period and grid cells larger than the Debye length, and 2) it can do so while maintaining exact energy and charge conservation. How the implicit solver works, and steps taken to implement the algorithm for axisymmetric geometries are discussed. Initial applications to be discussed include a first-principles study of species energy partition in strong shocks for fully ionized plasmas, and magnetic-piston driven compression of a plasma slab in planar and cylindrical geometries. Finally, we discuss future work related to simulating burning ICF implosion experiments and implementing the algorithm in the GPU-capable WarpX particle code.

J. Angus, W. Farmer, A. Friedman, Y. Fu, V. Geyko, D. Ghosh, D. Grote, D. Larson, A. Link, J. Ludwig, G. Zimmerman