Shielding a monoenergetic photon source for nonproliferation applications analysis

Miller, C. A.; Geddes, C. G. R.; Clarke, S. D.; Pozzi, S. A.

doi:10.1016/j.nima.2019.01.075

Shielding a monoenergetic photon source for nonproliferation applications analysis

Journal Article · Tue Feb 05 00:00:00 EST 2019 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2019.01.075· OSTI ID:1699499

Miller, C. A. ^[1]; Geddes, C. G. R. ^[2]; Clarke, S. D. ^[3]; Pozzi, S. A. ^[3]

Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of Michigan, Ann Arbor, MI (United States)

Near-monoenergetic photon sources offer appealing improvements over broad-band bremsstrahlung sources when applied to challenges in nonproliferation efforts. The use of a laser-plasma accelerator offers electrons at the energies needed for multi-MeV Thomson sources in a compact form factor. Because these electrons have energy up to approximately 0.5 GeV, many energetic photons and neutrons are created as they are dumped out of the beam line. This fact creates challenges for performing experiments to demonstrate the advantages of such a photon source for nonproliferation applications in the short term, until effective methods for decelerating the electrons are developed. To mitigate these background particles for laboratory measurements, a system of beam dumps and secondary collimators has been designed. Once background flux is reduced to the lowest practical level, it is compared to the expected flux created by the source photon beam on a lead target. This simulation mimics a nonproliferation application by predicting measured flux off-axis from an interrogated high-Z object as a surrogate for special nuclear material. Background mitigation techniques are also expanded to a mobile interrogation case. Furthermore, these methods allow for demonstration of nonproliferation applications of near-monoenergetic photon sources and future deployment in the field.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development

Grant/Contract Number:: NA0002534; NA0003920

OSTI ID:: 1699499

Alternate ID(s):: OSTI ID: 1873927

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. 954; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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