Non-linear simulations of the TCV Scrape-Off Layer. (August 2017) - Nespoli, F.
Highlights: A nonlinear numerical simulation of a the Scrape-Off Layer of a TCV discharge is performed. The numerical results are compared with the experimental ones finding qualitative agreement. The results of a second simulation with 40 times higher resistivity are discussed. Abstract: To investigate the mechanisms leading to the heat deposition onto the first wall in the Scrape-Off Layer (SOL), we perform dedicated numerical non-linear simulations of the SOL plasma dynamics of a TCV discharge using the GBS code. The simulated parallel heat flux profiles on the limiter agree qualitatively with the experimental ones obtained by means of infrared thermography, showing a double scale length. Non-ambipolar currents are found to flow to the limiter, consistently with the experiments. The contribution of the latter to the total heat flux is discussed. The results of a second simulation identical to the first one but with 40 times higher resistivity are also discussed.