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

Journal Article · · High Power Laser Science and Engineering
DOI:https://doi.org/10.1017/hpl.2015.25· OSTI ID:1512877
 [1];  [2];  [2];  [3];  [4]
  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
+ Show Author Affiliations

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.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0000859; NA0002267
OSTI ID:
1512877
Alternate ID(s):
OSTI ID: 1879281
Report Number(s):
SAND--2015-3156J; 662161
Journal Information:
High Power Laser Science and Engineering, Journal Name: High Power Laser Science and Engineering Vol. 3; ISSN 2095-4719; ISSN applab
Publisher:
Cambridge University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Impact of 3D effects on the characteristics of a multi-monochromatic x-ray imager journal January 2019

Figures / Tables (5)

FIG. 1(p. 2)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 3)figure FIG. 3
FIG. 5(p. 5)figure FIG. 5
FIG. 4(p. 5)figure FIG. 4

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Related Subjects

47 OTHER INSTRUMENTATION
high power laser
inertial confinement fusion
monochromatic imager
x-ray diagnostics