Influence of elastic collisions on neutral gas transport in boundary plasmas
Elastic collision processes between neutral particles and plasma ions have recently regained attention in plasma edge modelling, since very low temperature divertor plasmas are observed in present experiments. This paper considers elastic collisions between protons and hydrogen atoms, helium atoms and hydrogen molecules. Classical and semi-classical methods are used to calculate relevant collision data, such as the deflection function and total cross-sections. Integration of such processes into existing Monte Carlo codes is described. These data are used to investigate the effect of elastic collisions on neutral gas transport in hydrogen-helium boundary plasmas. Results from a simplified analytic slab model are used for benchmarking the Monte Carlo algorithm. The first application is to a fully consistent plasma fluid-neutral gas kinetic transport calculation for an ASDEX-Upgrade SOL configuration.
Bibliographic Reference: Article: Contributions to Plasma Physics, Vol. 32 (1992) No. 3-4, pp. 261-267
Record Number: 199310279 / Last updated on: 1994-11-29
Original language: en
Available languages: en