Performance studies for a next-generation optical sensor for IceCube-Gen2

TL;DR

This paper evaluates the performance of a new segmented optical sensor design for IceCube-Gen2, focusing on optimizing photon detection efficiency under extreme Antarctic conditions through simulation studies.

Contribution

It introduces a novel sensor design with multiple PMTs and optical gel pads, and analyzes various geometries to enhance sensitivity for IceCube-Gen2.

Findings

Optimized sensor geometries increase photon capture efficiency.

Gel pads improve internal reflection and photon detection.

Simulation results guide sensor design improvements.

Abstract

We present performance studies of a segmented optical module for the IceCube-Gen2 detector. Based on the experience gained in sensor development for the IceCube Upgrade, the new sensor will consist of up to eighteen 4 inch PMTs housed in a transparent pressure vessel, providing homogeneous angular coverage. The use of custom molded optical `gel pads' around the PMTs enhances the photon capture rate via total internal reflection at the gel-air interface. This contribution presents simulation studies of various sensor, PMT, and gel pad geometries aimed at optimizing the sensitivity of the optical module in the face of confined space and harsh environmental conditions at the South Pole.