TY - GEN

T1 - Energy Partition at Collisionless Shocks in Plasmas With Super-Thermal Pickup Ion Populations

AU - Roytershteyn, Vadim

AU - Gedalin, Michael

AU - Pogorelov, Nikolai

PY - 2021

Y1 - 2021

N2 - Collisionless shocks are ubiquitous in many space physics, astrophysics,
and laboratory settings. One of the basic unsolved theoretical issues is
quantitative prediction of the downstream plasma state for given
upstream parameters. This problem becomes even more significant in
situation where super-thermal population of ions are present upstream
from the shock, as is the case for many shocks encountered in
heliosphere, e.g. the termination shock. In this contribution, we
discuss the problem, present overview of the previous investigations,
and introduce recent advancements obtained with the aid of a
semi-analytical theoretical model, which is compared against results of
fully kinetic particle-in-cell simulations.

AB - Collisionless shocks are ubiquitous in many space physics, astrophysics,
and laboratory settings. One of the basic unsolved theoretical issues is
quantitative prediction of the downstream plasma state for given
upstream parameters. This problem becomes even more significant in
situation where super-thermal population of ions are present upstream
from the shock, as is the case for many shocks encountered in
heliosphere, e.g. the termination shock. In this contribution, we
discuss the problem, present overview of the previous investigations,
and introduce recent advancements obtained with the aid of a
semi-analytical theoretical model, which is compared against results of
fully kinetic particle-in-cell simulations.

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BT - APS Division of Plasma Physics Meeting 2019

ER -