论文标题
电子传输模型对毛细管排放等离子体的影响
Impact of Electron Transport Models on Capillary Discharge Plasmas
论文作者
论文摘要
磁流失动力学（MHD）可用于模拟激光效率加速器中的毛细血管排出波导。但是，由于微观闭合模型不良，MHD的预测能力可能会受到影响。在这里，我们研究了电子加热和热传导对毛细管波导性能的影响，这是了解和量化建模和设计下一代血浆加速器中不确定性的努力的一部分。为此，我们使用带有三种不同电子传输系数模型的氩气毛细管排放波导进行二维高分辨率MHD模拟。测试的模型包括（i）Davies等人。 （ii）Spitzer和（iii）Epperlein-Haines（EH）。我们发现，EH模型高估了通道内部的电子温度超过$ 20 \％$，同时预测了较低的方位角磁场。此外，经常用于基于等离子体的加速器的MHD模拟中的Spitzer模型预测电子温度明显高于其他模型所建议的电子温度。
Magnetohydrodynamics (MHD) can be used to model capillary discharge waveguides in laser-wakefield accelerators. However, the predictive capability of MHD can suffer due to poor microscopic closure models. Here, we study the impact of electron heating and thermal conduction on capillary waveguide performance as part of an effort to understand and quantify uncertainties in modeling and designing next-generation plasma accelerators. To do so, we perform two-dimensional high-resolution MHD simulations using an argon-filled capillary discharge waveguide with three different electron transport coefficients models. The models tested include (i) Davies et al. (ii) Spitzer, and (iii) Epperlein-Haines (EH). We found that the EH model overestimates the electron temperature inside the channel by over $20\%$ while predicting a lower azimuthal magnetic field. Moreover, the Spitzer model, often used in MHD simulations for plasma-based accelerators, predicts a significantly higher electron temperature than the other models suggest.
