Speaker
Description
Currently under construction in the United States, the Deep Underground Neutrino Experiment (DUNE) is a next-generation international experiment focused on neutrino oscillation studies. The DUNE Far Detector will consist of four 17-kton Liquid Argon Time Projection Chamber (LArTPC) modules, two with established geometries and technologies in Phase I, while the remaining two are under discussion for Phase II. Phase I will consist of one Vertical Drift (VD) detector and one Horizontal Drift (HD) detector. Both LArTPCs will employ a Photon Detection System based on X-ARAPUCA devices instrumented with Silicon Photomultipliers (SiPMs).
This contribution presents the validation of a custom measurement system developed for the characterization of SiPMs for the VD module. The experimental setup is designed to ensure accurate and reliable I-V measurements at both room and cryogenic temperatures, supporting the large-scale automated testing required for more than 100,000 light sensors.
It presents a comprehensive analysis of the measurement chain (including biasing and current-readout stages) to evaluate metrological performance, stability, repeatability, and breakdown voltage extraction through normalized-derivative methods coupled with second-order polynomial fitting.
Experimental results demonstrate the suitability of the system to serve as the baseline for the CACTUS-VD (Cryogenic Apparatus for Continuous Tests Upon SiPMs for Vertical Drift) facility, enabling robust qualification of SiPMs in large batches for long-term neutrino experiments.
