https://doi.org/10.1140/epjp/s13360-025-06230-2
Regular Article
Optimization of geomagnetic shielding based on detection efficiency
1
Departamento de Física, Universidad de Oviedo, Calvo Sotelo 18, 33007, Oviedo, Asturias, España
2
MOMA, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Independencia 13, 33004, Oviedo, Asturias, España
3
Departamento de Explotación y prospección de Minas, Universidad de Oviedo, Independencia 13, 33004, Oviedo, Asturias, España
4
Department of Physics, University of Keio, Hiyoshi 3-14-1, 223-8522, Yokohama, Japan
5
Departamento de Matemáticas, Universidad de Oviedo, Calvo Sotelo 18, 33007, Oviedo, Asturias, España
Received:
23
September
2024
Accepted:
18
March
2025
Published online:
10
April
2025
Due to the progressive increase in size of the latest Cherenkov-type detectors, it is becoming increasingly important to design a suitable compensation system based on coils of the Earth’s magnetic field to ensure the correct operation of the photomultipliers (PMTs). Until now, most studies have assessed the correct functioning of such a system by the proportion of PMTs experiencing more than 100 mG of magnetic field perpendicular to their axis. In the present study, we discuss whether this evaluation parameter is the most appropriate and propose the average residual perpendicular magnetic field 
as an alternative that more closely reflects the loss of detection efficiency of PMTs. A compensation system design is also proposed that offers good results as well as being economical to optimize this parameter.
© The Author(s) 2025
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