Magnetic shielding for large photoelectron multipliers for the OSIRIS facility of the JUNO detector

Abstract

We present the technical design and characteristics of the magnetic shield developed for 20" PMTs of the low-background OSIRIS facility. A ribbon of amorphous alloy with the extreme magnetic permeability was used in its design providing the excellent efficiency in screening the Earth's magnetic field with a relatively small amount of the material. The mass of materials is crucial for the construction of low-background facilities from the point of view of radioactive backgrounds. Using amorphous materials is cost-efficient compared to other methods for screening the Earth's magnetic field.

arXiv comment15 pages, 8 figures, 5 tables

References in corpus (5)

• Science and Technology of BOREXINO: A Real Time Detector for Low Energy Solar Neutrinos SOLAR NEUTRINOS
• Study of Large Hemispherical Photomultiplier Tubes for the ANTARES Neutrino Telescope
• The veto system of the DarkSide-50 experiment
• Large photocathode 20-inch PMT testing methods for the JUNO experiment
• Search for phenomena beyond the Standard Model in events with large $b$-jet multiplicity using the ATLAS detector at the LHC