Bulg. J. Phys. vol.32 no.4 (2005), pp. 263-271



Method for Simulation of Particle Recombination in SOL Plasma

L. Popova1, G. Kamberov2, T. Nikolov1, P. Marinov3, D. Mitev4
1Institute of Mathematics and Informatics, Bulg. Acad. of Sci., Acad. G. Bonchev Str, Block 8, 1113 Sofia, Bulgaria
2Department of Computer Science, Stevens Institute of Technology, Castle Point on Hudson, Hoboken NJ 07030, USA
3Institute for Parallel Processing, Bulg. Acad. of Sci., Acad. G. Bonchev Str, Block 25-A, 1113 Sofia, Bulgaria
4Department of Physical Chemistry, Faculty of Chemistry, Sofia University St Kl. Ohridski, Sofia, Bulgaria
Abstract. The effect of charged particle recombination is investigated performing particle in cell (PIC) simulation of plasma in tokamak devices. For the simulation of particle collisions is used an appropriate method to account for frequencies spread in wide range of magnitude. The method was tested simulating steady state plasma in the scrape off layer (SOL). A constant density profile of deuterium atoms is assumed with sharp peaks in divertor region.
The simulation results show decreasing frequency of recombination near the plates of divertor where the ionization is dominating due to the big concentration of deuterium atoms. The recombination processes become more frequent deep in the SOL where the density of neutral particles is rather low.

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