Common iron passive magnetic shielding for scintillator array photomultiplier tubes
Seminars
Veksler and Baldin Laboratory of High Energy Physics
Detector Technologies Seminar № 1-2026
Date and Time: Thursday, 5 February 2026, at 11:00 AM
Venue: bld. 215, room 347, Veksler and Baldin Laboratory of High Energy Physics, online on Volna
Seminar topic: “Common iron passive magnetic shielding for scintillator array photomultiplier tubes”
Speaker: Stepan Cherepanov
Authors: Timur Atovullaev (JINR, Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan), Stepan Cherepanov (JINR, Moscow State University), Asya Atovullaeva (JINR), Julian Kahlbow (Massachusetts Institute of Technology, Cambridge, USA; School of Physics and Astronomy, Tel Aviv University), Maria Patsyuk (JINR), Or Hen (Massachusetts Institute of Technology, Cambridge, USA), Göran Johansson (MSU), Irina Kruglova (JINR), Boris Meirovich (School of Physics and Astronomy, Tel Aviv University), Sergey Nepochatykh (JINR), E. Pyasetsky (MSU), Semyon Piyadin (JINR), Alexander Salamatin (JINR), Sergey Sedykh (JINR), S. Segev (School of Physics and Astronomy, Tel Aviv University), Y. Zhang (Tsinghua University, Beijing, China).
In accelerator-based experiments, detector arrays constructed from organic plastic scintillators are widely used for measurements of particle timing, hit position, and energy loss. These detectors are often operated in proximity to magnetic spectrometers, where the associated photomultiplier tubes (PMTs) are exposed to fringe magnetic fields. The standard approach to mitigate magnetic interference involves individually shielding each PMT. In this work, we present a combined passive shielding solution consisting of a common iron enclosure for a row of PMTs, supplemented with individual mu-metal cylinders. This configuration was deployed during a 2022 experiment at JINR. Performance evaluations show that the proposed shielding effectively preserves PMT gain and timing resolution, demonstrating its viability for future applications in similar experimental environments.