Comparison of GDB edge simulations of Alcator C-Mod IWL L-mode with experimental measurements*

Four Alcator C-Mod IWL L-mode shots were simulated with the GDB code [1] -- a global 3D drift-reduced Braginskii based electromagnetic edge turbulence model evolves both plasma and flow profiles self-consistently in both SOL and close flux region. In these simulations, magnetic geometry and particle source profile were based on EFIT and KN1D model respectively [2]; plasma profiles were initially set to be close to experiment measurements but allowed to evolve freely afterwards. We found that well beyond turbulence saturated stage (>2 ms), the global plasma and the spontaneous generated E×B flow [3] profiles obtained from GDB simulations agree well with the MLP data. Turbulence statistics analysis [4] and comparison with MLP and GPI data are underway.

[1] Zhu et.al, CPC, in press (2018) [2] LaBombard, PSFC/RR-01-3, (2001)[3] Zhu et.al, PoP, 24, 055903, (2017)[4] Francisquez et.al, NF, 57, 116049 (2017)