Topic/Type: 2.3 Hybrid methods, including PIC/DSMC and PIC/Fluid, Oral

Development of PIC MC code BIT1 for plasma edge simulations

D. Tskhakaya1, R. Schneider2

1 University of Innsbruck, Association EURATOM-OEAW, A-6020 Innsbruck, Austria
2 Max Planck Institute fuer Plasmaphysik, EURATOM Assoc., Wendelsteinstr. 1, 17491 Greifswald, Germany

We describe a new Particle-in Cell Monte Carlo (PIC MC) code BIT1 for plasma edge simulations and corresponding simulations. The BIT1 code incorporates electrostatic 1d3V PIC for charged and 2d3v MC parts for neutral particle dynamics. The memory optimized structure of this code allows increasing run speed few times and supports simulation of practically unlimited number of particle species including all kinds of elastic and inelastic interaction between the particles [1]. Code includes nonlinear particle collision operators conserving momentum and energy, and linear plasma-surface interaction model [2].
The parallel version of the code uses new adaptive processor load scheme leading to a good scaling up to 1000 and more processors.
The new BIT1 code allows realistic kinetic simulation of few meter size tokamak Scrape-off Layer with the finest (Debye length) resolution. Results of these simulations are discussed

[1] D. Tskhakaya and R. Schneider, J. of Comp. Phys., 225 (1), 829-839 (2007).

[2] D. Tskhakaya, S. Kuhn, Y. Tomita, K. Matyash, R. Schneider and F. Taccogna, Contrib. Plasma Phys., 48 (1-3), 121-125 (2008).