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:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- 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; TRN: US2201373
- 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. doi: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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