Lab and Beam Tests of a SiPM-readout ASIC with a Large Dynamic Range

TL;DR

This paper evaluates a new ASIC, MPT2321, for SiPM readout in high-granularity calorimeters, demonstrating its large dynamic range and good noise performance through lab and beam tests.

Contribution

It provides the first comprehensive characterization of MPT2321's performance for SiPM readout in high-energy physics applications.

Findings

The ASIC shows a large dynamic range suitable for ECAL applications.

It maintains a good signal-to-noise ratio in tests.

The device exhibits linear response over its operational range.

Abstract

A front-end readout system with a large dynamic range is required for the high-granularity crystal electromagnetic calorimeter (ECAL) at future Higgs factories. A new commercially available ASIC, MPT2321, which offers a significantly large dynamic range for the readout of the silicon photomultiplier (SiPM), has been tested in the laboratory and at a test beam facility. The fundamental performance metrics have been characterised, including response linearity, inter-calibration factor and noise performance. To quantitatively assess the dynamic range of the chip and evaluate its feasibility for SiPM readout in high-granularity crystal ECAL, a beamtest was conducted using scintillating crystals exposed to electron beams. Beamtest results showed that the chip exhibits a promising performance in terms of a good signal-to-noise ratio and a relatively large dynamic range.