发表机构
Lawrence Livermore National Laboratory; University of California San Diego; Prism Computational Sciences; University of Nevada, Reno; Laboratory for Laser Energetics（劳伦斯利弗莫尔国家实验室; 加州大学圣地亚哥分校; 普里斯姆计算科学公司; 内华达大学里诺分校; 激光能学实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文介绍利用LLNL升级的Titan倍频短脉冲激光建立实验平台，表征高密度高温等离子体中高电荷态离子的X射线发射，并通过首次实验与MERL计算及猎户座设施对比，验证了平台可靠性，为高密度原子物理基准测试奠定基础。
AI 中文摘要
我们正在劳伦斯利弗莫尔国家实验室的朱庇特激光设施开发一个实验平台，用以表征高密度（$n_e > 10^{23}$ cm$^{-3}$）、高温（$T_e \sim 1$ keV）条件下高电荷态离子的X射线发射，该平台利用了最近升级的倍频短脉冲Titan激光。这些测量将为高电子密度对原子结构的影响提供实验基准，包括斯塔克展宽、电离势降低、密度相关的谱线位移以及介电复合的抑制，这些效应与高能量密度和天体物理学界使用的光谱建模软件包相关。在此，我们描述了该平台的当前状态，并展示了利用升级后的倍频能力进行的首次实验结果，包括从五个时间积分X射线通道获取的校准K壳层光谱。与MERL谱线形状计算以及在英国原子武器研究院猎户座激光设施记录的光谱进行比较表明，升级后的Titan激光能够可靠地产生所需的等离子体条件，为未来活动中高密度原子物理的系统性基准测试奠定了基础。
英文摘要
We are developing an experimental platform at Lawrence Livermore National Laboratory's Jupiter Laser Facility to characterize X-ray emission from highly charged ions in the high-density ($n_e > 10^{23}$ cm$^{-3}$), high-temperature ($T_e \sim 1$ keV) regime, leveraging the recently upgraded frequency-doubled short-pulse Titan laser. These measurements will provide experimental benchmarks for high electron density effects on atomic structure, including Stark broadening, ionization potential depression, density-dependent line shifts, and suppression of dielectronic recombination, effects that are relevant to spectral modeling packages used by both the high-energy-density and astrophysics communities. Here, we describe the current status of the platform and present results from first experiments using the upgraded frequency-doubling capability, including calibrated K-shell spectra acquired from five time-integrated X-ray channels. Comparisons with MERL line shape calculations and with spectra recorded at AWE's Orion Laser Facility indicate that the upgraded Titan laser reliably produces the necessary plasma conditions, establishing a foundation for systematic benchmarking of high-density atomic physics in future campaigns.
Journal refRev. Sci. Instrum. 1 October 2026; 97 (10): 103506
