Implicit coupling of impurity transport at the SOLcore interface
The paper presents a numerical technique for modeling trace impurity transport in the scrape-off-layer (SOL) and core regions by implicit coupling of a three-dimensional (3D) edge Monte Carlo code like EMC3-Eirene Feng etal. (2004)[4], Reiter etal. (2005)[6] to a one-dimensional (1D) core model handled by a finite difference method. For given core plasma and transport coefficient profiles, certain types of particular solutions to the 1D model are pre-calculated under specific boundary conditions at the SOLcore interface. Linear combination of these solutions yields a general solution, which is then translated into Monte Carlo language by formulating a so-called charge state transition probability matrix. This matrix provides definitive boundary conditions at the SOLcore interface so that a self-consistent solution for both SOL and core is achievable without the need for SOLcore iteration.
impurity transport plasma monte-carlo method