Florido R, Nagayama T, Mancini R C, Tommasini R, Delettrez J A, Regan S P, Smalyuk V A, Rodríguez R, Gil J M
Department of Physics, University of Nevada, Reno, Nevada 89557, USA.
Rev Sci Instrum. 2008 Oct;79(10):10E310. doi: 10.1063/1.2965779.
We discuss the observation and data analysis of argon K-shell line spectra from argon-doped deuterium-filled OMEGA direct-drive implosion cores based on data recorded with two streaked crystal spectrometers. The targets were 870 microm in diameter, 27 microm wall thickness plastic shells filled with 20 atm of deuterium gas, and a tracer amount of argon for diagnostic purposes. The argon K-shell line spectrum is primarily emitted at the collapse of the implosion and its analysis provides a spectroscopic diagnostic of the core implosion conditions. The observed spectra includes the He alpha, Ly alpha, He beta, He gamma, Ly beta, and Ly gamma line emissions and their associated He- and Li-like satellites thus covering a broad photon energy range from 3100 to 4200 eV with a spectral resolution power of approximately 500. The data analysis relies on detailed atomic and spectral models that take into account nonequilibrium collisional-radiative atomic kinetics, Stark-broadened line shapes, and radiation transport calculations.
我们基于两台条纹晶体光谱仪记录的数据，讨论了来自掺氩充氘的欧米茄（OMEGA）直接驱动内爆核心的氩K壳层线光谱的观测与数据分析。靶丸是直径870微米、壁厚27微米的塑料壳，内部充有20个大气压的氘气，并含有痕量氩用于诊断目的。氩K壳层线光谱主要在内爆坍缩时发射，对其分析可提供核心内爆条件的光谱诊断。观测到的光谱包括氦α、莱曼α、氦β、氦γ、莱曼β和莱曼γ线发射及其相关的类氦和类锂卫星线，从而覆盖了从3100到4200电子伏特的宽光子能量范围，光谱分辨率约为500。数据分析依赖于详细的原子和光谱模型，这些模型考虑了非平衡碰撞辐射原子动力学、斯塔克展宽线形状以及辐射传输计算。
