A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion

作者：Sherlock M^*; Brodrick J P; Ridgers C P

来源：Physics of Plasmas, 2017, 24(8): 082706.

DOI：10.1063/1.4986095

We compare the reduced non-local electron transport model developed by Schurtz et al. [Phys. Plasmas 7, 4238 (2000)] to Vlasov-Fokker-Planck simulations. Two new test cases are considered: the propagation of a heat wave through a high density region into a lower density gas, and a one-dimensional hohlraum ablation problem. We find that the reduced model reproduces the peak heat flux well in the ablation region but significantly over-predicts the coronal preheat. The suitability of the reduced model for computing non-local transport effects other than thermal conductivity is considered by comparing the computed distribution function to the Vlasov-Fokker-Planck distribution function. It is shown that even when the reduced model reproduces the correct heat flux, the distribution function is significantly different to the Vlasov-Fokker-Planck prediction. Two simple modifications are considered which improve agreement between models in the coronal region. Published by AIP Publishing.

• 出版日期2017-8