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Proceedings Paper

Lens design challenges for scintillator-based neutron imaging
Author(s): V. Geppert-Kleinrath; L. Tafoya; C. Danly; V. Fatherley; E. Mendoza; J. Vaughan; C. Wilde; P. Volegov
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Paper Abstract

Neutron imaging is a powerful diagnostic to study inertial confinement fusion (ICF) implosions at the National Ignition Facility (NIF) using neutrons emitted in the fusion reactions. Analysis of time-gated images of the primary fusion (14.1 MeV) and down-scattered (6-12 MeV) neutrons based on their time-of-flight allows for the reconstruction of the burning hot spot undergoing fusion and the surrounding cold fuel. The Los Alamos National Laboratory (LANL) Advanced Imaging team has been providing these images since 2011. Now, two additional lines of sight are being designed and built for NIF to allow three-dimensional reconstructions. Neutron imaging relies on the conversion of neutrons into light to be captured by an imaging system through the use of a scintillator. While the current neutron imaging system utilizes a fiber scintillator array, a newly designed imaging system will consist of a thick monolithic scintillator and custom-designed lenses to collect the light. The custom lens has to resolve an image produced in the thick volume of the scintillator and therefore needs a large depth of field.

Paper Details

Date Published: 11 September 2018
PDF: 7 pages
Proc. SPIE 10763, Radiation Detectors in Medicine, Industry, and National Security XIX, 107630P (11 September 2018); doi: 10.1117/12.2322920
Show Author Affiliations
V. Geppert-Kleinrath, Los Alamos National Lab. (United States)
L. Tafoya, Los Alamos National Lab. (United States)
C. Danly, Los Alamos National Lab. (United States)
V. Fatherley, Los Alamos National Lab. (United States)
E. Mendoza, Los Alamos National Lab. (United States)
J. Vaughan, Los Alamos National Lab. (United States)
C. Wilde, Los Alamos National Lab. (United States)
P. Volegov, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 10763:
Radiation Detectors in Medicine, Industry, and National Security XIX
Gary P. Grim; Lars R. Furenlid; H. Bradford Barber; Jeffrey A. Koch, Editor(s)

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