The impact of permanent magnetic fields on photomultiplier HAMAMATSU R7899-20 used in a hadron calorimeter of LHCb experiment

The influence of a permanent magnetic field strength up to 40 Gs (4 mT) to operation PMT HAMAMATSU R7899-20 with its standart magnetic screens and without them is investigated. This PMT is used in a hadron calorimeter of LHCb experiment at CERN. It is shown that the use of a protective housing made...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 798; no. 1; pp. 12138 - 12141
Main Authors Dmitrenko, V V, Vorobyev, K A, Vlasik, K F, Grachev, V M, Muravyev-Smirnov, S S, Novikov, A S, Ulin, S E, Uteshev, Z M, Shustov, A E, Petrenko, D V, Chernysheva, I V, Shmatkov, I A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2017
Subjects
CERN
Duralumin
Ferrous alloys
Field strength
Housing
Large Hadron Collider
Magnetic alloys
Magnetic fields
Magnetic materials
Magnetic shielding
Photomultiplier tubes
Physics
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Summary:The influence of a permanent magnetic field strength up to 40 Gs (4 mT) to operation PMT HAMAMATSU R7899-20 with its standart magnetic screens and without them is investigated. This PMT is used in a hadron calorimeter of LHCb experiment at CERN. It is shown that the use of a protective housing made of steel in joint its use with permalloy screen significantly reduces screening efficiency. It proposed to use a protective housing made from non-magnetic material (duralumin) electrolytic coated with a multilayered film as magnetic shield. This solution can be used in a hadron calorimeter, the CERN installations SHiP.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/798/1/012138