3-5 October 2018
INFN-LNF, Italy
Europe/Rome timezone

Kinetic complexity in divertor region: Insights from particle-in-cell simulations

5 Oct 2018, 15:30
30m
Bruno Touschek Auditorium (INFN-LNF, Italy)

Bruno Touschek Auditorium

INFN-LNF, Italy

Via E. Fermi, 40 I-00044 Frascati

Speaker

Francesco Taccogna (BA)

Description

The coupled dynamics and kinetics between gas and plasma in the divertor region is studied by means of a one-dimensional Particle in Cell-Direct Simulation Monte Carlo (PIC-DSMC) model. In particular, the collision-induced vibrational excitation/relaxation of H2 molecules and particle–surface interaction (vibrational relaxation and recombinative desorption) have been considered in detail to assess the importance of plasma volumetric recombination by molecular assisted reaction (MAR). Spatially resolved results show that MAR processes are effective very close to the divertor plate in a region closer than 1.5 mm from the divertor plate. For farther regions the atom ionization, produced by MAR, starts to make molecular assisted recombination an ineffective reaction.

Primary author

Co-author

Dr Pierpaolo Minelli (CNR-Nanotec)

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