AI 中文总结
本文研究了离子温度对月球光电子鞘的影响，通过加入热压力项修正离子流力方程，结合多粒子求解泊松方程，发现暖离子会改变鞘特性且高纬度效应更显著，或调节尘埃动力学。
AI 中文摘要
观测表明，撞击月球表面的太阳风离子具有有限温度，本文研究离子温度对月球表面等离子体鞘的影响。为考虑热效应，在离子流力方程中加入热压力项；通过求解泊松方程，结合光电子、太阳风电子和暖离子，对鞘特性进行定量估算。与冷离子相比，鞘内暖离子的存在会：i）改变电势、电场及鞘粒子密度结构；ii）改变鞘厚度；iii）减少光电子捕获；iv）减少太阳风电子反射。该效应在月球高纬度地区更为显著，可能会显著调节尘埃动力学。
英文摘要
Observations suggest that the solar wind ions impinging on the lunar surface possess a finite temperature. The effect of ion temperature on the plasma sheath over the lunar surface is investigated in this paper. To account for thermal effects, a thermal pressure term has been added to the ion-flow force equation. Quantitative estimation of sheath characteristics has been performed by solving the Poisson equation, accounting for photoelectrons, solar wind electrons, and warm ions. Notably, the presence of warm ions within the sheath, i) changes the potential, field, sheath population density structures, ii) changes the sheath thickness, iii) reduces the photoelectron trapping, and iv) reduces solar wind electron reflection, compared to cold ions. The effect is more prominent at high lunar latitudes, which in turn may significantly modulate the dust dynamics.
Comments10 pages, 12 figures
