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Multilayer film shields for the protection of PMT from constant magnetic field
Dmitrenko, V. V. Besson, David Zeke Nyunt, PhyoWai Grabchikov, S. S. Grachev, V. M. Muraviev-Smirnov, C. C. Ulin, S. E. Uteshev, Z. M. Vlasik, K. F.
Dmitrenko, V. V.
Besson, David Zeke
Nyunt, PhyoWai
Grabchikov, S. S.
Grachev, V. M.
Muraviev-Smirnov, C. C.
Ulin, S. E.
Uteshev, Z. M.
Vlasik, K. F.
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Abstract
Photomultiplier tubes (PMTs) are widely used in physical experiments as well as in applied devices.
PMTs are sensitive to magnetic field, so creation of effective magnetic shields for their protection is
very important. In this paper, the results of measurements of shielding effectiveness of multilayer film
magnetic shields on PMT-85 are presented. Shields were formed by alternating layers of a material
with high magnetic permeability (Ni-Fe) and high electric conductivity—Cu. The maximum number
of bilayers reached 45. It is shown that in weak magnetic fields up to 0.5 mT, the output signal
amplitude from PMT-85 does not change for all used multilayer shields. In strong magnetic field of
2–4 mT, the output signal amplitude decrease with 10%–40% depending from the number of layers in the shield. The Pulse distribution of PMT-85 in magnetic field 0.2–4 mT slightly changed in the range 1.1%–1.3% for the case when the number of layers do not exceed 10 and practically did not change for a shield with 45 double layers.
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This is the Published Version made available with the permission of the publisher.
Date
2015-01-13
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AIP Publishing
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Dmitrenko, V. V., Besson, D., Nyunt, P., Grabchikov, S. S., Grachev, V. M., Muraviev-Smirnov, C. C., … Vlasik, K. F. (2015). Multilayer film shields for the protection of PMT from constant magnetic field. Review of Scientific Instruments, 86(1), 013903.
http://dx.doi.org/10.1063/1.4904873