考虑吸收效应后对Z-pinch产生A1等离子体发射谱的非局域热动平衡模拟

本工作在采用细致能级模型计算等离子体布居数的基础上，细致地计算了等离子体的发射系数和吸收系数，采用简化的NLTE（非局域热动平衡）一维定态辐射输运近似计算了考虑吸收效应以后Z-pinch产生的A1等离子体的细致能谱并作了分析，结合考虑吸收与不考虑吸收时等离子体发射谱结构的改变，初步分析了等离子体不透明度对等离子体X光谱的影响．计算结果表明，不透明度效应对等离子体的光谱改造非常明显，等离子体不透明度对共振线有明显的影响，而对伴线的影响较小．我们的计算结果还表明，Z-pinch等离子体K线的有效吸收半径约为100-200um．

NLTE simulation of spectrum for Z-pinch Al plasma with the effects of opacity

In this article, the emission coefficients and absorption coefficients of a Z-pinch A1 plasma are calculated in non localthermodynamicequilibrium model （NLTE） under detailed level accounting model （DLA） base on the calculation of level populations at first. Then, we calculate the detail spectrum of A1 plasma and analyze the opacity effects on plasma elementary using a simple 1-D slate radicalization-transition model. The calculation results indicate that the effect of absorption is very strong to Z-pinch plasma especially on resonance lines （It influenced the figure of plasma spectrum obviously）. Yet it＇s effect slightly on satellite lines. The Z-pinch A1 plasma is optical thick to resonance lines but thin to satellite lines. In more detail the calculation results show that the effective absorption radius of K-shell lines in the Z-pinch A1 plasma is about 100-200 ~tm.