Dual-energy fast neutron imaging using tunable short-pulse laser-driven sources

Williams, Gerald Jackson; Aufderheide, M.; Champley, Kyle M.; Djordjević, Blagoje Z.; Ma, Tammy; Ryan, C.; Simpson, Raspberry A.; Wilks, S. C.

doi:10.1063/5.0101832

Title: Dual-energy fast neutron imaging using tunable short-pulse laser-driven sources

Journal Article · Thu Sep 22 00:00:00 EDT 2022 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0101832· OSTI ID:1890838

^[1]; Aufderheide, M. ^[1];

^[1];

^[1]; Ryan, C. ^[2];

^[3]; Wilks, S. C. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); US Naval Academy, Annapolis, MD (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

A novel dual-energy fast neutron imaging technique is presented using short-pulse laser-driven neutron sources to leverage their inherent adaptive spectral control to enable 3D volume segmentation and reconstruction. Laser-accelerated ion beams incident onto secondary targets create directional, broadband, MeV-class neutrons. Synthetic radiographs are produced of multi-material objects using ion and neutron spectra derived from analytic and numerical models. It is demonstrated that neutron images generated from small changes to the neutron spectra, controlled by altering the initial laser conditions, are sufficient to isolate materials with differing attenuation coefficients. This is first demonstrated using a simplistic combinatorial isolation method and then by employing more advanced reconstruction algorithms to reduce artifacts and generate a segmentation volume of the constituent materials.

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-07NA27344; 22-ERD-022; 224 AC52-07NA27344

OSTI ID:: 1890838

Alternate ID(s):: OSTI ID: 1888834

Report Number(s):: LLNL-JRNL-835787; 1054699; TRN: US2310093

Journal Information:: Review of Scientific Instruments, Vol. 93, Issue 9; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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