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

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.

doi:10.1063/1.5039363

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

Journal Article · Wed Oct 17 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5039363· OSTI ID:1479074

Holder, J. P. ^[1]; ^[1]; Beach, M. ^[1]; Ayers, M. J. ^[1]; Bell, P. ^[1]; ^[1]; Bradley, D. K. ^[1]; Kohut, T. ^[1]; Ehrlich, R. ^[1]; Cohen, M. ^[1]; Ramirez, R. ^[1]; Thorn, D. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1479074

Alternate ID(s):: OSTI ID: 1477907

Report Number(s):: LLNL-JRNL--750846; 936509

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities Thorn, D. B.; Coppari, F.; Döppner, T. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039423	journal	October 2018
Image-plate sensitivity to x rays at 2 to 60 keV Rosenberg, M. J.; Thorn, D. B.; Izumi, N. Review of Scientific Instruments, Vol. 90, Issue 1 https://doi.org/10.1063/1.5053592	journal	January 2019
The Crystal Backlighter Imager: A spherically bent crystal imager for radiography on the National Ignition Facility Hall, G. N.; Krauland, C. M.; Schollmeier, M. S. Review of Scientific Instruments, Vol. 90, Issue 1 https://doi.org/10.1063/1.5058700	journal	January 2019