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Title: On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility

Abstract

At the National Ignition Facility (NIF), storage phosphor image plates (IP) are used extensively for recording x-rays, charged particles, and neutrons. For x-ray imaging and spectroscopy, absolute and relative calibrations are important for extracting plasma information from the diagnostics. We use Fuji MS, SR, and TR image plates that have been cut to fit custom diagnostic envelopes. The image plates are scanned on a General Electric FLA 7000 IP flying spot scanner. Calibrations for sensitivity, spatial scale, and temperature dependent fade are applied. During a set of recent calibrations, we noticed large shifts in the absolute calibration of the image plate system. The possible source of these shifts is discussed. We discuss scanner stability and a method for calibration. We discuss the fade and temperature effects of the image plates and how this correction is applied within the NIF environment. Here, we also compare our NIF GE FLA 7000 IP scanner with a new General Electric Amersham Typhoon IP scanner.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1479074
Alternate Identifier(s):
OSTI ID: 1477907
Report Number(s):
LLNL-JRNL-750846
Journal ID: ISSN 0034-6748; 936509
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
Lasers; 47 OTHER INSTRUMENTATION

Citation Formats

Holder, J. P., Izumi, N., Beach, M., Ayers, M. J., Bell, P., Schneider, M., Bradley, D. K., Kohut, T., Ehrlich, R., Cohen, M., Ramirez, R., and Thorn, D. On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility. United States: N. p., 2018. Web. doi:10.1063/1.5039363.
Holder, J. P., Izumi, N., Beach, M., Ayers, M. J., Bell, P., Schneider, M., Bradley, D. K., Kohut, T., Ehrlich, R., Cohen, M., Ramirez, R., & Thorn, D. On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility. United States. doi:https://doi.org/10.1063/1.5039363
Holder, J. P., Izumi, N., Beach, M., Ayers, M. J., Bell, P., Schneider, M., Bradley, D. K., Kohut, T., Ehrlich, R., Cohen, M., Ramirez, R., and Thorn, D. Wed . "On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility". United States. doi:https://doi.org/10.1063/1.5039363. https://www.osti.gov/servlets/purl/1479074.
@article{osti_1479074,
title = {On the system stability and calibration of the image plate/scanner system for plasma diagnosis at the National Ignition Facility},
author = {Holder, J. P. and Izumi, N. and Beach, M. and Ayers, M. J. and Bell, P. and Schneider, M. and Bradley, D. K. and Kohut, T. and Ehrlich, R. and Cohen, M. and Ramirez, R. and Thorn, D.},
abstractNote = {At the National Ignition Facility (NIF), storage phosphor image plates (IP) are used extensively for recording x-rays, charged particles, and neutrons. For x-ray imaging and spectroscopy, absolute and relative calibrations are important for extracting plasma information from the diagnostics. We use Fuji MS, SR, and TR image plates that have been cut to fit custom diagnostic envelopes. The image plates are scanned on a General Electric FLA 7000 IP flying spot scanner. Calibrations for sensitivity, spatial scale, and temperature dependent fade are applied. During a set of recent calibrations, we noticed large shifts in the absolute calibration of the image plate system. The possible source of these shifts is discussed. We discuss scanner stability and a method for calibration. We discuss the fade and temperature effects of the image plates and how this correction is applied within the NIF environment. Here, we also compare our NIF GE FLA 7000 IP scanner with a new General Electric Amersham Typhoon IP scanner.},
doi = {10.1063/1.5039363},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

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Figures / Tables:

FIG. 1 FIG. 1: Schematic Energy Level Diagram of Typical Br F Ba Image Plate with Eu dopant/activator

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    Works referencing / citing this record:

    X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities
    journal, October 2018

    • Thorn, D. B.; Coppari, F.; Döppner, T.
    • Review of Scientific Instruments, Vol. 89, Issue 10
    • DOI: 10.1063/1.5039423

    Image-plate sensitivity to x rays at 2 to 60 keV
    journal, January 2019

    • Rosenberg, M. J.; Thorn, D. B.; Izumi, N.
    • Review of Scientific Instruments, Vol. 90, Issue 1
    • DOI: 10.1063/1.5053592

    The Crystal Backlighter Imager: A spherically bent crystal imager for radiography on the National Ignition Facility
    journal, January 2019

    • Hall, G. N.; Krauland, C. M.; Schollmeier, M. S.
    • Review of Scientific Instruments, Vol. 90, Issue 1
    • DOI: 10.1063/1.5058700

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