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Title: Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility

Abstract

The use of x-ray diffraction (XRD) measurements in laser-driven dynamic compression experiments at high-power laser facilities is becoming increasingly common. Diffraction allows one to probe in situ the transformations occurring at the atomic level at extreme conditions of pressure, temperature, and time scale. In these measurements, the x-ray source is generated by irradiation of a solid foil. Under certain laser drive conditions, quasimonochromatic He-α radiation is generated. Careful analysis of the x-ray source plasma spectra reveals that this radiation is not a single line emission and that monochromaticity is highly dependent on the laser irradiance. In this work, we analyze how the spectra emitted by laser-irradiated copper, germanium, and iron foils at the Omega Laser vary depending on different laser drive conditions and discuss the implications for XRD experiments.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [1];  [1];  [1]; ORCiD logo [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1632368
Alternate Identifier(s):
OSTI ID: 1579584
Report Number(s):
LLNL-JRNL-757490
Journal ID: ISSN 0034-6748; 944391
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 90; Journal Issue: 12; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Lasers; Emission spectroscopy; Crystal spectroscopy; X-ray diffraction

Citation Formats

Coppari, F., Smith, R. F., Thorn, D. B., Rygg, J. R., Liedahl, D. A., Kraus, R. G., Lazicki, A., Millot, M., and Eggert, J. H. Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility. United States: N. p., 2019. Web. https://doi.org/10.1063/1.5111878.
Coppari, F., Smith, R. F., Thorn, D. B., Rygg, J. R., Liedahl, D. A., Kraus, R. G., Lazicki, A., Millot, M., & Eggert, J. H. Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility. United States. https://doi.org/10.1063/1.5111878
Coppari, F., Smith, R. F., Thorn, D. B., Rygg, J. R., Liedahl, D. A., Kraus, R. G., Lazicki, A., Millot, M., and Eggert, J. H. Sun . "Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility". United States. https://doi.org/10.1063/1.5111878. https://www.osti.gov/servlets/purl/1632368.
@article{osti_1632368,
title = {Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility},
author = {Coppari, F. and Smith, R. F. and Thorn, D. B. and Rygg, J. R. and Liedahl, D. A. and Kraus, R. G. and Lazicki, A. and Millot, M. and Eggert, J. H.},
abstractNote = {The use of x-ray diffraction (XRD) measurements in laser-driven dynamic compression experiments at high-power laser facilities is becoming increasingly common. Diffraction allows one to probe in situ the transformations occurring at the atomic level at extreme conditions of pressure, temperature, and time scale. In these measurements, the x-ray source is generated by irradiation of a solid foil. Under certain laser drive conditions, quasimonochromatic He-α radiation is generated. Careful analysis of the x-ray source plasma spectra reveals that this radiation is not a single line emission and that monochromaticity is highly dependent on the laser irradiance. In this work, we analyze how the spectra emitted by laser-irradiated copper, germanium, and iron foils at the Omega Laser vary depending on different laser drive conditions and discuss the implications for XRD experiments.},
doi = {10.1063/1.5111878},
journal = {Review of Scientific Instruments},
number = 12,
volume = 90,
place = {United States},
year = {2019},
month = {12}
}

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