Characterization of large area photomutipliers under low magnetic fields: design and performances of the magnetic shielding for the Double Chooz neutrino experiment

TL;DR

This paper evaluates the magnetic shielding design for Hamamatsu R7081 photomultipliers used in the Double Chooz neutrino experiment, focusing on their performance under low magnetic fields.

Contribution

It presents the characterization of photomultiplier performance and introduces a new magnetic shielding design tailored for the experiment.

Findings

Effective magnetic shielding improves photomultiplier performance.

Characterization results demonstrate reduced magnetic field effects.

Design specifications meet experimental requirements.

Abstract

This paper describes the characterization studies under low magnetic fields of the Hamamatsu R7081 photomultipliers that are being used in the Double Chooz experiment. The design and performances of the magnetic shielding that has been developed for these photomultipliers are also reported.