# Fast Coincidence Filter for Silicon Photomultiplier Dark Count Rate Rejection

## TL;DR

This paper introduces a fast and efficient method to reduce the dark count rate in Silicon Photomultipliers using signals from Photomultiplier Tubes as a trigger.

## Contribution

A low-resource coincidence filter is developed to effectively mitigate Silicon Photomultiplier dark count rates.

## Key findings

- A coincidence filter architecture was developed to reduce dark count rates in Silicon Photomultipliers.
- Initial results validate the effectiveness of using Photomultiplier Tube signals as a trigger for this purpose.
- The method is shown to be fast and resource-efficient.

## Abstract

Silicon Photomultipliers find applications across various fields. One potential Silicon Photomultiplier application domain is neutrino telescopes, where they may enhance the angular resolution. However, the elevated dark count rate associated with Silicon Photomultipliers represents a significant challenge to their widespread utilization. To address this issue, it is proposed to use Silicon Photomultipliers and Photomultiplier Tubes together. The Photomultiplier Tube signals serve as a trigger to mitigate the dark count rate, thereby preventing undue saturation of the available bandwidth. This paper presents an investigation into a fast and resource-efficient method for filtering the Silicon Photomultiplier dark count rate. A low-resource and fast coincident filter has been developed, which removes the Silicon Photomultiplier dark count rate by using as a trigger the Photomultiplier Tube input signals. The architecture of the coincidence filter, together with the first results obtained, which validate the effectiveness of this method, is presented.