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Title: Low Distortion Lens Design for Large Scintillators

Abstract

Tomographic imaging of large objects from an x-ray source require a 240 mm square scintillator that is imaged onto a 90 mm square charge-coupled device (CCD) with <0.01% distortion. A large pellicle and internal folding mirror keep the optical elements and the CCD camera out of the x-ray beam path to minimize shielding requirements. Better imaging is needed for 2-D digital radiography and computer tomography (3-D) on the Los Alamos National Laboratory’s Microtron x-ray–generating source, a bremsstrahlung source with endpoint energies of 6, 10, 15, and 20 MeV. Large objects are placed into the x-ray beam and rotated between radiographs. X-rays are deposited into scintillators that are viewed with digital cameras. Better light gathering is needed because the scintillators emit low levels of light. Earlier imaging techniques used film in contact with the scintillator. Our design goal is to match the resolution of the digital camera system to that of the film. 3-D tomography requires extremely low distortion of the collected images.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2]
  1. Nevada National Security Site, National Security Technologies, LLC, New Mexico Operations, Los Alamos, New Mexico, USA
  2. Los Alamos National Laboratory, Los Alamos, New Mexico, USA
Publication Date:
Research Org.:
Nevada National Security Site/National Security Technologies,LLC
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1542644
Report Number(s):
DOE/NV/25946-3293
Journal ID: ISBN; 978-1-943580-31-6
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Journal Name:
Proceedings of Optical Society of America, International Optical Design Conference 2017 (online Technical Digest JTu5A.19 )
Additional Journal Information:
Conference: Optical Society of America, International Optical Design Conference, Denver, Colorado, July 9-13, 2017 https://www.osa.org/en-us/meetings/osa_meetings/optical_design_and_fabrication/international_optical_design_conference/
Publisher:
OSA—The Optical Society, 2010 Massachusetts Ave., N.W. Washington, D.C. 20036-1012 USA Tel: 1.202.223.8130
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; x-ray, scintillator, charge-coupled device, 2-D digital radiography, computer tomography (3-D), bremsstrahlung

Citation Formats

Malone, Robert M., Frayer, Daniel K., Kaufman, Morris I., Manhart, Paul K., Gautier, D. Cort, Hunter, James F., Lattimore, Brandon M., and Vansyoc, Kelley G. Low Distortion Lens Design for Large Scintillators. United States: N. p., 2017. Web. doi:10.1364/FREEFORM.2017.JTu5A.19.
Malone, Robert M., Frayer, Daniel K., Kaufman, Morris I., Manhart, Paul K., Gautier, D. Cort, Hunter, James F., Lattimore, Brandon M., & Vansyoc, Kelley G. Low Distortion Lens Design for Large Scintillators. United States. doi:10.1364/FREEFORM.2017.JTu5A.19.
Malone, Robert M., Frayer, Daniel K., Kaufman, Morris I., Manhart, Paul K., Gautier, D. Cort, Hunter, James F., Lattimore, Brandon M., and Vansyoc, Kelley G. Thu . "Low Distortion Lens Design for Large Scintillators". United States. doi:10.1364/FREEFORM.2017.JTu5A.19. https://www.osti.gov/servlets/purl/1542644.
@article{osti_1542644,
title = {Low Distortion Lens Design for Large Scintillators},
author = {Malone, Robert M. and Frayer, Daniel K. and Kaufman, Morris I. and Manhart, Paul K. and Gautier, D. Cort and Hunter, James F. and Lattimore, Brandon M. and Vansyoc, Kelley G.},
abstractNote = {Tomographic imaging of large objects from an x-ray source require a 240 mm square scintillator that is imaged onto a 90 mm square charge-coupled device (CCD) with <0.01% distortion. A large pellicle and internal folding mirror keep the optical elements and the CCD camera out of the x-ray beam path to minimize shielding requirements. Better imaging is needed for 2-D digital radiography and computer tomography (3-D) on the Los Alamos National Laboratory’s Microtron x-ray–generating source, a bremsstrahlung source with endpoint energies of 6, 10, 15, and 20 MeV. Large objects are placed into the x-ray beam and rotated between radiographs. X-rays are deposited into scintillators that are viewed with digital cameras. Better light gathering is needed because the scintillators emit low levels of light. Earlier imaging techniques used film in contact with the scintillator. Our design goal is to match the resolution of the digital camera system to that of the film. 3-D tomography requires extremely low distortion of the collected images.},
doi = {10.1364/FREEFORM.2017.JTu5A.19},
journal = {Proceedings of Optical Society of America, International Optical Design Conference 2017 (online Technical Digest JTu5A.19 )},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {8}
}

Conference:
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