Light detection with power and signal transmission over fiber

TL;DR

This paper presents a novel fiber optic system for power and signal transmission in the DUNE neutrino experiment's Liquid Argon TPC detectors, enabling efficient remote operation of embedded photon detectors.

Contribution

It introduces a combined Power-over-Fiber and Signal-over-Fiber system for the first time in this context, validated through extensive testing at CERN.

Findings

Successful demonstration of PoF and SoF in a neutrino detector environment

Stable power delivery and signal transmission over fiber during tests

Potential for improved detector reliability and maintenance

Abstract

The Deep Underground Neutrino Experiment (DUNE) is a next generation long baseline (1300 km) neutrino oscillation experiment. The neutrino beam measurements will be performed by a near detector (ND) and far detector (FD). The far detector will consist of four modules, installed 1,5 km deep underground, based on Liquid Argon Time Projection Chamber (LArTPC) technology to detect particles. The Vertical Drift (VD) LArTPC is a recent technology proposed by the DUNE Collaboration for the second FD module. In VD, light collection will be optimized by embedding photon detectors within the LArTPC cathode, which is biased at -300 kV. As result, power must arrive to the Photon Detection System (PDS) and signal must be transmitted via non-conductive material. The proposed solution is to use Power-over-Fiber (PoF) and Signal-over-Fiber (SoF). An intense validation of the system is being performed by the Collaboration at the CERN Neutrino Platform, design and results from data collected over the first half of 2022 are presented.