Suprathermal Velocity Distributions in the Transition Region: The Foundation of the Velocity Filtration Model of the Corona

9320623 Scudder在这项提议中，pi寻求资金来发展直接的理论论据，即过渡区域的底部是速度过滤理论假设的超热尾形成的特别肥沃的地点。“携带”日冕气体胚胎的载体是完全电离气体离开色球球顶部时的超热尾部，而热气体出现在较冷气体之上的机制是速度过滤对吸引势井中非热分布的空间演化的集中效应。在这种观点中，(1)通向TR基的丰富波，(2)基下分层完全电离等离子体中可能出现的卷积效应，以及(3)库仑碰撞中存在的准中性，这些综合效应都会在速度分布上留下“印记”，而速度分布是太阳大气完全电离扩展的边界条件。速度分布函数在该区域的电场和磁场中在TR基以上演化，就好像它们处于“速度依赖反射传输线”中，优先过滤掉低能粒子，以尊重初始超热种群的高能粒子。这些种群通过速度过滤得到集中和分散，因此它们的温度升高，而不需要在过渡区底部以上进一步增加能量。＊＊＊

9320623 Scudder In this proposal the PIs seek funding to develop direct theoretical arguments that the base of the transition region is an especially fertile site for the suprathermal tail formation assumed by the velocity filtration theory. The vehicle that "carries" the embryonic coronal gas is the suprathermal tail of the fully ionized gas as it leaves the top of the chromosphere and that the mechanism for the emergence of hot gas overlying cooler gas is the concentrating effect velocity filtration has on the spatial evolution of non-thermal distributions in an attractive potential well. In this view, the combined effects of (1) the copious waves leading up to the TR base, (2) the convolution effects possible in a stratified fully ionized plasma below the base, and (3) the quasi-neutrality in the presence of coulomb collisions all leave their "imprint" on the velocity distributions that are the boundary conditions for the fully ionized extension of the solar atmosphere. The velocity distribution functions evolve above the TR base in the electric and magnetic force fields above this region as if they were in a "velocity dependent reflecting transmission line" that preferentially filters out the low energy particles in deference to the higher energy particles of the initially suprathermal populations. These populations by velocity filtration get concentrated and their dispersion and hence their temperature increases without any further energy addition above the base of the transition region. ***