Multi Time-Over-Threshold System for Light Signal in a Liquid Xenon 3-Photon Compton Camera

This paper shows how multi-time-over-threshold (MTOT) method outperforms single-time-over-threshold (STOT) in precisely determining both the arrival time and the number of vacuum ultraviolet (VUV) photons detected by each PMT in a prototype 3-\gamma liquid xenon medical nuclear imaging system. Based...

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Bibliographic Details
Main Authors: Laine, Q., Beaupere, N., Cai, D., Lahuec, C., Morteau, E., Seguin, F., Thers, D.
Format: Conference Proceeding
Language:English
Subjects:
Cameras
Image reconstruction
Liquids
Photonics
Prototypes
Sensors
Signal resolution
Solids
Vacuum systems
Xenon
Online Access:Request full text
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Summary:This paper shows how multi-time-over-threshold (MTOT) method outperforms single-time-over-threshold (STOT) in precisely determining both the arrival time and the number of vacuum ultraviolet (VUV) photons detected by each PMT in a prototype 3-\gamma liquid xenon medical nuclear imaging system. Based on both experimental and simulated results, MTOT yields a 70% improvement in reconstructing the number of photoelectrons (PEs) and a 20-30% increase in arrival time precision as compared to STOT. These results pave the way for preliminary spatial localization of the \gamma interaction helping reducing the imaging system's occupancy rate when imaged activity increases.
ISSN:2168-9229
DOI:10.1109/SENSORS60989.2024.10784579