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Title: Towards in-situ high precision local material velocity measurements in lattice materials under dynamic compression

Abstract

The study of dynamic compression of materials requires high precision spatial and temporal resolution to infer the material state at any given time. In ultra-fast imaging experiments such as those performed at the Dynamic Compression Sector at the Advanced Photon Source, the current CCD frame rate is less than the X-ray pulse rate necessitating that 4 CCDs be used to image a single scintillator screen to obtain the same projection of transmitted or diffracted beam at time intervals synchronized with the X-ray beam. The use of multiple-camera setups is often employed for a variety of reasons including enhancing the temporal resolution through interleaving frames or increasing the number of viewpoints, for example. Physical corrections are made to have each CCD approximately viewing the same field of view, however we present corrections that can be made after the data collection to further refine and be able to compare movements and changes in the sample between independent CCDs. These software corrections enable higher precision and higher fidelity comparison of position changes due to sample deformation. Furthermore, we present a method to correct images (or frames) as a demonstration toward high fidelity displacement measurements in these types of ultra-fast multi-camera setup experiments.

Authors:
 [1];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1493681
Grant/Contract Number:  
NA0002442
Resource Type:
Accepted Manuscript
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1979; Journal ID: ISSN 0094-243X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Lind, J., Jensen, B. J., and Kumar, M. Towards in-situ high precision local material velocity measurements in lattice materials under dynamic compression. United States: N. p., 2018. Web. doi:10.1063/1.5044927.
Lind, J., Jensen, B. J., & Kumar, M. Towards in-situ high precision local material velocity measurements in lattice materials under dynamic compression. United States. doi:10.1063/1.5044927.
Lind, J., Jensen, B. J., and Kumar, M. Tue . "Towards in-situ high precision local material velocity measurements in lattice materials under dynamic compression". United States. doi:10.1063/1.5044927. https://www.osti.gov/servlets/purl/1493681.
@article{osti_1493681,
title = {Towards in-situ high precision local material velocity measurements in lattice materials under dynamic compression},
author = {Lind, J. and Jensen, B. J. and Kumar, M.},
abstractNote = {The study of dynamic compression of materials requires high precision spatial and temporal resolution to infer the material state at any given time. In ultra-fast imaging experiments such as those performed at the Dynamic Compression Sector at the Advanced Photon Source, the current CCD frame rate is less than the X-ray pulse rate necessitating that 4 CCDs be used to image a single scintillator screen to obtain the same projection of transmitted or diffracted beam at time intervals synchronized with the X-ray beam. The use of multiple-camera setups is often employed for a variety of reasons including enhancing the temporal resolution through interleaving frames or increasing the number of viewpoints, for example. Physical corrections are made to have each CCD approximately viewing the same field of view, however we present corrections that can be made after the data collection to further refine and be able to compare movements and changes in the sample between independent CCDs. These software corrections enable higher precision and higher fidelity comparison of position changes due to sample deformation. Furthermore, we present a method to correct images (or frames) as a demonstration toward high fidelity displacement measurements in these types of ultra-fast multi-camera setup experiments.},
doi = {10.1063/1.5044927},
journal = {AIP Conference Proceedings},
number = ,
volume = 1979,
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: (a) Impact direction is perpendicular to imaging (X-ray) direction. (b) A series of mirrors projects the same X-ray image onto 4 physically distinct CCDs.

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