Application Of Multilayer Film Configuration To Protect Photomultiplier Against External Static Magnetic Fields

The effectiveness of the screening constant magnetic field is multi-layered film screens system of NiFe/Cu, formed on the cylindrical housing of photomultiplier tubes, and compared with screen-based steel material - brand 80NHS permalloy. It is shown that the most effective is the screen on the basis of the multilayered film screens, which provide shielding effectiveness value 8-10 in magnetic fields with induction of 0,1-1 mT, and 80-100 - in magnetic fields with induction of 2-4 mT, which is 4-5 times higher than for the screen of the material 80NHS. (E-mail:gss@iftt.bas-net.by).