The properties of hot, dense plasmas generated by the irradiation of GaAs targets by the Titan laser at Lawrence Livermore National Laboratory were determined by the analysis of high resolution K shell spectra in the 9 keV to 11 keV range. The laser parameters, such as relatively long pulse duration and large focal spot, were chosen to produce a steady-state plasma with minimal edge gradients, and the time-integrated spectra were compared to non-LTE steady state spectrum simulations using the FLYCHK and NOMAD codes. The bulk plasma streaming velocity was measured from the energy shifts of the Ga He-like transitions and Li-like dielectronic satellites. The electron density and the electron energy distribution, both the thermal and the hot non-thermal components, were determined from the spectral line ratios. After accounting for the spectral line broadening contributions, the plasma turbulent motion was measured from the residual line widths. The ionization balance was determined from the ratios of the He-like through F-like spectral features. The detailed comparison of the experimental Ga spectrum and the spectrum simulated by the FLYCHK code indicates two significant discrepancies, the transition energy of a Li-like dielectronic satellite (designated t) and the calculated intensity of a He-like line (x), that should lead to improvements in the kinetics codes used to simulate the X-ray spectra from highly-charged ions.

通过对9 keV至11 keV范围内的高分辨率K壳光谱进行分析，确定了由劳伦斯·利弗莫尔国家实验室（Lawrence Livermore National Laboratory）的泰坦激光照射GaAs目标所产生的热致密等离子体的特性。选择激光参数（例如相对较长的脉冲持续时间和较大的焦点）以产生具有最小边缘梯度的稳态等离子体，并将时间积分光谱与使用FLYCHK和NOMAD的非LTE稳态光谱模拟进行比较代码。从Ga He样跃迁和Li样双电子卫星的能量位移测量整体等离子体流速度。从光谱线比率确定热和热的非热成分的电子密度和电子能量分布。在考虑了谱线加宽贡献之后，从残余线宽测量了等离子体湍流运动。根据He样与F样光谱特征的比率确定电离平衡。实验Ga谱和FLYCHK码模拟谱的详细比较表明存在两个显着差异，即类Li的双电子卫星的跃迁能（指定为t）和类似He的谱线（x）的计算强度，这将导致动力学代码的改进，该动力学代码用于模拟高电荷离子的X射线光谱。