Single photon detection with amorphous silicon-based microchannel plates: A Monte Carlo model

Microchannel plates based on amorphous silicon have the inherent capability to overcome the existing spatial and temporal resolution limitations of single photon detectors. A Monte Carlo model-based study is presented here that serves to exploit their full potential. The dynamics of electron multiplication throughout the microchannels in the presence of an electric field is modelled based on electron emission models and experimental measurements. The geometrical limits for suitable amplification and the expected time resolution of amorphous silicon based microchannel plates are presented. Furthermore, the model is implemented in a finite element method simulator to estimate electron multiplication gain and time response for channels with various geometries. With gains above 1000 and timing jitters below 3 ps that are shown for selected geometries, AMCPs enable ultrafast measurements for medical applications and single photon detection.

Automated summary

A Monte Carlo model-based study is presented to investigate the dynamic process of electron multiplication in microchannels based on amorphous silicon. The study provides insights into the geometrical limitations and time resolution of amorphous silicon based microchannel plates. The model is implemented in a finite element method simulator to estimate the electron multiplication gain and time response for channels with different geometries. Results show that amorphous silicon based microchannel plates have the potential for ultrafast measurements.