Physics of Afterglow Plasmas
15th May 2017, PHYSIKALISCHES KOLLOQUIUM, HNB, Ruhr-Universität Bochum
Start: 15th May 2017 12:15
End: 15th May 2017 01:30 p.m.
Tsanko Tsankov, Ruhr-Universität Bochum
U. Czarnetzki, Ruhr-Universität Bochum
Low -temperature plasmas are generally complex systems where heating, energy loss and transport are key aspects. The interaction among t he particles within the various ensembles in the plasma (electrons, ions and atoms) is mostly weak but the coupling between the different ensembles can be strong . Consequently, non - equilibrium distributions of particles are typical. Afterglow plasma s are characterized by the lack of energy input by external electromagnetic fi elds. Transport and cooling are decoupled from heating which reduce s the comple xity of the system. Interesting phenomena are for example evaporative cooling of electrons, population of highly excited Rydberg states and non - local distribution func tions of electrons and ions. In the talk the physics of these processes will be elucidated experimentally and theoretically.