Measurements of efficiency, timing and response to irradiation for direct detection of charged particles with SiPMs

TL;DR

This study demonstrates that Silicon PhotoMultipliers (SiPMs) can achieve nearly 100% efficiency in charged particle detection, with a timing resolution of about 20 ps, and maintain performance after irradiation with proper thresholding.

Contribution

The paper provides the first comprehensive measurements of SiPM efficiency, timing resolution, and post-irradiation performance for direct charged particle detection.

Findings

Detection efficiency close to 100%

Timing resolution around 20 ps

Maintains performance after irradiation with threshold adjustment

Abstract

In this paper the efficiency of direct charged particle detection with different Silicon PhotoMultiplier (SiPM) sensors has been measured to be close to 100%. Time resolution of about 20 ps has also been confirmed for sensors with an active area of around 3x3 mm$^\text{2}$ and a single-cell area of 40 $\mu$m$^\text{2}$. In addition, the SiPM performance after irradiation, in terms of timing response and dark count rate, has been evaluated for sensors with a 1x1 mm$^\text{2}$ area, demonstrating that SiPMs can maintain excellent timing capabilities and a low dark count rate when an appropriate threshold is applied to the signal.