Development of a novel optical calibration system for nuclear imaging

B. C. Sanders; C. R. Danly; E. R. Casco; J. S. Cowan; V. E. Fatherley; D. N. Fittinghoff; M. S. Freeman; V. Geppert-Kleinrath; H. J. Jorgenson; M. S. Rubery; C. H. Wilde

doi:10.1117/12.3031544

16 October 2024 Development of a novel optical calibration system for nuclear imaging

B. C. Sanders, C. R. Danly, E. R. Casco, J. S. Cowan, V. E. Fatherley, D. N. Fittinghoff, M. S. Freeman, V. Geppert-Kleinrath, H. J. Jorgenson, M. S. Rubery, C. H. Wilde

Author Affiliations +

Proceedings Volume 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI; 131510C (2024) https://doi.org/10.1117/12.3031544
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

The Nuclear Imaging System at the National Ignition Facility (NIF) collects primary and downscattered neutron, x-ray, and gamma-ray images of inertial confinement fusion implosions. Penumbral and pinholeprojection images are recorded using scintillators coupled to fast-gated intensified cameras. Successful reconstruction relies on accurate characterization of the imaging system sensitivity, which can vary by up to a factor of 2 across the field of view. Historically, this has been accomplished by using NIF shots without the aperture to uniformly illuminate the detector, or to project onto it a grid pattern from a fiducial plate to correct for detector sensitivity and optical system aberrations, respectively. However, frequent changes to the imaging system due to equipment failures or vibrations within the building have increased the need for calibrations, which are limited in availability to approximately once per year because they require sacrificing imaging data on a neutron-producing shot. We present development work on an optical calibration system that will enable the collection of this data without that requirement promptly, easily, and at regular intervals.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

B. C. Sanders, C. R. Danly, E. R. Casco, J. S. Cowan, V. E. Fatherley, D. N. Fittinghoff, M. S. Freeman, V. Geppert-Kleinrath, H. J. Jorgenson, M. S. Rubery, and C. H. Wilde "Development of a novel optical calibration system for nuclear imaging", Proc. SPIE 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI, 131510C (16 October 2024); https://doi.org/10.1117/12.3031544

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