# Characterization of the HZC Photonics XP82B20D and XP1805D Photomultiplier Tubes for Low-Temperature Applications

## TL;DR

This paper characterizes two HZC Photonics photomultiplier tubes, XP82B20D and XP1805D, demonstrating their suitability for low-temperature applications like IceCube optical modules through detailed performance analysis.

## Contribution

It provides detailed characterization data for two specific PMT models, confirming their performance and noise behavior at low temperatures for potential use in IceCube.

## Key findings

- Good agreement with manufacturer specifications
- Excellent noise performance at low temperatures
- Suitable for use in IceCube optical modules

## Abstract

The IceCube Collaboration is investigating various types and manufacturers of photomultiplier tubes (PMT) for possible use in future optical modules. This report presents characterization results for two different types of HZC Photonics PMTs: the 3.5 inch XP82B20D and the 9 inch XP1805D. The results are in good agreement with the specifications as provided by the manufacturer. In addition, excellent noise behaviour is observed at the low temperatures relevant for possible use in IceCube optical modules.