A Monte Carlo model for velocity space effects in low recycling scrape-off layer plasmas

摘要: A Monte Carlo model solving only in velocity space is proposed to investigate a low recycling scrape-off layer (SOL) plasma. In the model, effects of Coulomb collisions are accurately described by non-linear collision operator; conductive heat flux into SOL effectively modelled via randomly exchanging source particles and particles; secondary electrons included. steady state plasma, which satisfies particle energy balances neutrality constraint, determined terms total fluxes across separatrix, edge plasma temperature, electron emission coefficient size. The gives gross features SOL, such as temperatures densities, sheath potential drop transmission factor. Simulations neglecting unlike performed. It found that factor collisional plasmas close agreement with theoretical predictions. present primarily provides useful information about collisionless difficult obtain analytically