X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2ω short-pulse laser
Abstract
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 (ne > 1023 cm−3), high-temperature (Te ∼ 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.
Versions
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BibTeX
@misc{fairchild2026xray,
title = {{X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2$ω$ short-pulse laser}},
author = {A. J. Fairchild and D. T. Bishel and T. Cordova and H. Flores-Alimboyoguen and M. F. Gu and P. Hamilton and N. Hell and M. J. MacDonald and E. W. Magee and R. C. Mancini and E. V. Marley and R. Shepherd and G. V. Brown},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.03552},
eprint = {2610.03552},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.03552},
}
RIS
TY - UNPB
TI - X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2ω short-pulse laser
AU - A. J. Fairchild
AU - D. T. Bishel
AU - T. Cordova
AU - H. Flores-Alimboyoguen
AU - M. F. Gu
AU - P. Hamilton
AU - N. Hell
AU - M. J. MacDonald
AU - E. W. Magee
AU - R. C. Mancini
AU - E. V. Marley
AU - R. Shepherd
AU - G. V. Brown
PY - 2026
DA - 2026/10/02
PB - arXiv
DO - 10.48550/arxiv.2610.03552
UR - https://arxiv.org/abs/2610.03552
AB - 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 ∼ 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.
ER -