High-energy radiographic imaging performance of LYSO

Journal Article · Wed May 23 04:00:00 UTC 2018 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2018.05.044 · OSTI ID:1441332

Smalley, Duane ^[1]; Duke, Dana  ^[2]; Webb, Timothy ^[3]; Baker, Stuart ^[1]; Castaneda, Jesus ^[1]; Corredor, Andrew ^[1]; Danielson, Jeremy ^[2]; Gehring, Mandie  ^[2]; Haines, Todd  ^[2]; Lutz, Steve ^[4]; Montoya, Kristina ^[1]; Stearns, John ^[2]

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1. Nevada National Security Site (NNSS), New Mexico Operations, Los Alamos, NM (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
4. Keystone International, Inc., Albuquerque, NM (United States)

Here, a comprehensive comparison of the dominant sources of radiation-induced blur for radiographic imaging system performance is made. End-point energies of 6, 10, 15, and 20 MeV bremsstrahlung photon radiation produced at the Los Alamos National Laboratory Microtron facility were used to examine the performance of large-panel cerium-doped lutetium yttrium silicon oxide (LYSO:Ce) scintillators 3, 5 and 10 mm thick. The system resolution was measured and compared between the various end-point energies and scintillator thicknesses. Contrary to expectations, it is found that there was only a minor dependence of system resolution on scintillator thickness or beam end-point energy. This indicates that increased scintillator thickness does not have a dramatic effect on system performance. The data are then compared to Geant4 simulations to assess contributions to the system performance through the examination of modulation transfer functions. It was determined that the low-frequency response of the system is dominated by the radiation-induced signal, while the higher-frequency response of the system is dominated by the optical imaging of the scintillation emission.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10); National Security Technologies, LLC, Las Vegas, NV (United States); Nevada National Security Site (NNSS), New Mexico Operations, Los Alamos, NM (United States). Mission Support and Test Services (MSTS)
• Grant/Contract Number: AC52-06NA25396; AC52-06NA25946; NA0003624; NA0003525
• OSTI ID: 1441332
• Report Number(s): LA-UR-18-20251
• 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. 914; ISSN 0168-9002
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English