Filter stack spectrometer measurements of high energy x-ray sources for radiography

Strehlow, Joseph; Wong, Chun-Shang; Luedtke, Scott V.; Bogale, Alemayehu; Bengoa, Alejandro Figueroa; Fitzgarrald, Rebecca; Mix, L. Tyler; Nedbailo, Ryan; Rusby, Dean R.; Schmidt, John L.; Twardowski, Justin; Van Pelt, Ashlyn; Coleman, Josh E.; Gautier, D. Cort; Hunter, James; Palaniyappan, Sasi; Tomkins, Christopher; Albright, Brian J.

doi:10.1016/j.nima.2025.170465

Filter stack spectrometer measurements of high energy x-ray sources for radiography

Journal Article · Thu Apr 03 00:00:00 EDT 2025 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2025.170465· OSTI ID:2554084

^[1]; ^[1]; ^[1]; ^[2]; ^[1]; ^[3]; Mix, L. Tyler ^[1]; Nedbailo, Ryan ^[4]; Rusby, Dean R. ^[5]; Schmidt, John L. ^[1]; Twardowski, Justin ^[6]; Van Pelt, Ashlyn ^[1]; ^[1]; Gautier, D. Cort ^[1]; Hunter, James ^[1]; Palaniyappan, Sasi ^[1]; Tomkins, Christopher ^[1]; Albright, Brian J. ^[1]

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
University of California, San Diego, CA (United States)
University of Michigan, Ann Arbor, MI (United States)
University of Texas, Austin, TX (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
The Ohio State University, Columbus, OH (United States)

Analyzing the spectra of MeV x-rays verifies the consistency of radiographic systems and provides a standardized way to compare outputs from different sources, such as traditional accelerator-based systems and newer laser-based systems. A stack of alternating image plates and filters, known as a Filter Stack Spectrometer (FSS), has been fielded at three x-ray sources: the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility, the X5000 commercial x-ray cabinet, and the Texas Petawatt laser. On the radiographic sources tested, varying salient parameters such as electron energy and target material changes the output MeV x-ray spectra. This diagnostic, configured with a spectral range of 50 keV–35 MeV, is evaluated via a novel inversion routine insensitive to assumed spectral shape. This insensitivity to spectral shape is essential for measuring spectra of sources that are difficult to predict with radiation transport models, such as multi-pulse accelerators and laser-driven sources. Radiation transport calculations representative of the DARHT experiment, which is straightforward to model, show good agreement between simulated and measured spectra. Future improvements to the FSS, such as replacing time-integrated image plates with scintillators, are also discussed.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: 89233218CNA000001; SC0021125

OSTI ID:: 2554084

Alternate ID(s):: OSTI ID: 2556816

Report Number(s):: LA-UR--25-22986

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1076; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Filter stack spectrometer measurements of high energy x-ray sources for radiography

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