Modeling blur in various detector geometries relevant to DARHT

Technical Report · Mon Apr 17 00:00:00 EDT 2017

DOI:https://doi.org/10.2172/1352435· OSTI ID:1352435

Winch, Nicola M. ^[1]; Watson, Scott Avery ^[1]; Hunter, James F. ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Monte Carlo transport codes have been used to model the detector blur and energy deposition in various detector geometries for MeV radiography which are applicable to DARHT. Segmented scintillator detectors, where low Z scintillators combined with a high-Z metal matrix, are designed such that the resolution increases with increasing metal fraction. The combination of various types of metal intensification screens and storage phosphor imaging plates has also been studied. A storage phosphor coated directly onto a metal intensification screen has superior performance over a commercial plate. Stacks of storage phosphor plates and tantalum intensification screens show an increase in energy deposited and detective quantum efficiency with increasing plate number, at the expense of resolution which degrades with plate number. Excellent agreement between simulation and experimental modulation transfer functions for select detector geometries was found.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1352435
• Report Number(s): LA-UR-17-23188
• Country of Publication: United States
• Language: English