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Light-weight flexible magnetic shields for large-aperture photomultiplier tubes

  • Author(s): Devore, P;
  • Escontrias, D;
  • Koblesky, T;
  • Lin, CJ;
  • Liu, DW;
  • Luk, KB;
  • Ngan, J;
  • Peng, JC;
  • Polly, C;
  • Roloff, J;
  • Steiner, H;
  • Wang, S;
  • Wong, J;
  • Yeh, M
  • et al.
Abstract

Thin flexible sheets of high-permeability FINEMET® foils encased in thin plastic layers have been used to shield various types of 20-cm-diameter photomultiplier tubes from ambient magnetic fields. In the presence of the Earth's magnetic field this type of shielding is shown to increase the collection efficiency of photoelectrons and can improve the uniformity of response of these photomultiplier tubes. © 2013 Elsevier B.V.

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