Picosecond imaging at high spatial resolution using TOFPET2 AISC v2d and microchannel plate detector

Citation

Sudjai, T., Lapington, J. S., & Leach, S. A. (2022). Picosecond imaging at high spatial resolution using TOFPET2 AISC v2d and microchannel plate detector. Journal of Instrumentation, 17(C9), C09016. https://doi.org/10.1088/1748-0221/17/09/C09016

Keywords

• Microchannel plate (MCP) detectors
• TOFPET2 ASIC v2d
• Single-photon counting
• High spatial resolution
• High temporal resolution/Fast timing
• Pixellated readout array
• Time-over-threshold (TOT)
• Centroiding
• Image charge technique

Brief

The article explores the use of the TOFPET2 ASIC v2d, in conjunction with a microchannel plate detector and pixellated readout array, for high spatial and temporal resolution single-photon imaging. 

Summary

This article, published in the Journal of Instrumentation, explores the use of microchannel plate (MCP) detectors for high-resolution imaging. While traditional MCP readouts are limited to moderate event rates, this study utilizes a pixellated readout array with the TOFPET2 ASIC to enable parallel processing of events for higher count rates. The research team found a linear relationship between time-over-threshold (TOT) and signal amplitude in their electronic stimulation measurements. Additionally, they successfully demonstrated a centroiding technique employing TOT signals for imaging MCP detector event positions. The authors suggest that further research will involve exploring centroiding techniques using machine learning to enhance spatial resolution. 

Origin: https://iopscience.iop.org/article/10.1088/1748-0221/17/09/C09016/pdf