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Title: An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images

Abstract

Temperature and density asymmetry diagnosis is critical to advance inertial confinement fusion (ICF) science. A multimonochromatic x-ray imager, MMI, records the spectral signature from an ICF implosion core with time resolution, 2D spatial resolution and spectral resolution. While narrow-band images and 2D space-resolved spectra from the MMI data constrain the temperature and the density spatial structure of the core, the accuracy of the images and the spectra highly depends on the quality of the MMI data and the processing tools. Here, we synthetically investigate the criterion for reliable MMI diagnostics and its effects on the accuracy of the reconstructed images. The pinhole array tilt determines the object spatial sampling efficiency and the minimum reconstruction width, $$\textit{w}$$. When the spectral width associated with $$\textit{w}$$ is significantly narrower than the spectral linewidth, the line images reconstructed from the MMI data become reliable. The MMI setup has to be optimized for every application to meet this criterion for reliable ICF diagnostics.

Authors:
 [1];  [2];  [2];  [3];  [4]
+ Show Author Affiliations
  1. Univ. of Nevada, Reno, NV (United States). Dept. of Physics; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Nevada, Reno, NV (United States). Dept. of Physics
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. de Las Palmas de Gran Canaria (Spain). Dept. de Fisica
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1512877
Alternate Identifier(s):
OSTI ID: 1879281
Report Number(s):
SAND-2015-3156J; LLNL-JRNL-838007
Journal ID: ISSN 2095-4719; applab; 662161
Grant/Contract Number:  
AC04-94AL85000; NA0000859; NA0002267; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
High Power Laser Science and Engineering
Additional Journal Information:
Journal Volume: 3; Journal ID: ISSN 2095-4719
Publisher:
Cambridge University Press
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; high power laser; inertial confinement fusion; monochromatic imager; x-ray diagnostics; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Nagayama, Taisuke, Mancini, Roberto C, Mayes, D., Tommasini, R., and Florido, R. An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images. United States: N. p., 2015. Web. doi:10.1017/hpl.2015.25.
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Nagayama, Taisuke, Mancini, Roberto C, Mayes, D., Tommasini, R., & Florido, R. An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images. United States. https://doi.org/10.1017/hpl.2015.25
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Nagayama, Taisuke, Mancini, Roberto C, Mayes, D., Tommasini, R., and Florido, R. Tue . "An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images". United States. https://doi.org/10.1017/hpl.2015.25. https://www.osti.gov/servlets/purl/1512877.
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@article{osti_1512877,
title = {An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images},
author = {Nagayama, Taisuke and Mancini, Roberto C and Mayes, D. and Tommasini, R. and Florido, R.},
abstractNote = {Temperature and density asymmetry diagnosis is critical to advance inertial confinement fusion (ICF) science. A multimonochromatic x-ray imager, MMI, records the spectral signature from an ICF implosion core with time resolution, 2D spatial resolution and spectral resolution. While narrow-band images and 2D space-resolved spectra from the MMI data constrain the temperature and the density spatial structure of the core, the accuracy of the images and the spectra highly depends on the quality of the MMI data and the processing tools. Here, we synthetically investigate the criterion for reliable MMI diagnostics and its effects on the accuracy of the reconstructed images. The pinhole array tilt determines the object spatial sampling efficiency and the minimum reconstruction width, $\textit{w}$. When the spectral width associated with $\textit{w}$ is significantly narrower than the spectral linewidth, the line images reconstructed from the MMI data become reliable. The MMI setup has to be optimized for every application to meet this criterion for reliable ICF diagnostics.},
doi = {10.1017/hpl.2015.25},
journal = {High Power Laser Science and Engineering},
number = ,
volume = 3,
place = {United States},
year = {Tue Aug 25 00:00:00 EDT 2015},
month = {Tue Aug 25 00:00:00 EDT 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1017/hpl.2015.25
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Cited by: 3 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) The signal collected through a pinhole is proportional to the source-to-pinhole solid angle, (b) spatial resolution is determined by object-pinhole-detector distances, (c) magnification is determined by object-pinhole distance, p, and object-detector distance, L. Optimal pinhole separation, l, is determined so that images of size FM do notmore » overlap.« less
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    Impact of 3D effects on the characteristics of a multi-monochromatic x-ray imager
    journal, January 2019

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