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Title: Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility

Abstract

Sixty-four neutral density filters constructed of metal plates with 88 apertures of varying diameter have been radiographed with a soft x-ray source and CCD camera at National Security Technologies, Livermore. An analysis of the radiographs fits the radial dependence of the apertures’ image intensities to sigmoid functions, which can describe the rapidly decreasing intensity towards the apertures’ edges. Here, the fitted image intensities determine the relative attenuation value of each filter. Absolute attenuation values of several imaged filters, measured in situ during calibration experiments, normalize the relative quantities which are now used in analyses of neutron spectrometer data at the National Ignition Facility.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1]; ORCiD logo [1];  [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. National Security Technologies, Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1341953
Report Number(s):
LLNL-PROC-694777
Journal ID: ISSN 0034-6748; RSINAK
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Conference: Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility, Madison, WI (United States), 5-9 Jun 2016; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Sayre, D. B., Barbosa, F., Caggiano, J. A., DiPuccio, V. N., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., and Weber, F. A. Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility. United States: N. p., 2016. Web. doi:10.1063/1.4959276.
Sayre, D. B., Barbosa, F., Caggiano, J. A., DiPuccio, V. N., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., & Weber, F. A. Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility. United States. doi:10.1063/1.4959276.
Sayre, D. B., Barbosa, F., Caggiano, J. A., DiPuccio, V. N., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., and Weber, F. A. Tue . "Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility". United States. doi:10.1063/1.4959276. https://www.osti.gov/servlets/purl/1341953.
@article{osti_1341953,
title = {Calibration of scintillation-light filters for neutron time-of-flight spectrometers at the National Ignition Facility},
author = {Sayre, D. B. and Barbosa, F. and Caggiano, J. A. and DiPuccio, V. N. and Eckart, M. J. and Grim, G. P. and Hartouni, E. P. and Hatarik, R. and Weber, F. A.},
abstractNote = {Sixty-four neutral density filters constructed of metal plates with 88 apertures of varying diameter have been radiographed with a soft x-ray source and CCD camera at National Security Technologies, Livermore. An analysis of the radiographs fits the radial dependence of the apertures’ image intensities to sigmoid functions, which can describe the rapidly decreasing intensity towards the apertures’ edges. Here, the fitted image intensities determine the relative attenuation value of each filter. Absolute attenuation values of several imaged filters, measured in situ during calibration experiments, normalize the relative quantities which are now used in analyses of neutron spectrometer data at the National Ignition Facility.},
doi = {10.1063/1.4959276},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {7}
}

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