Microchannel plates phototubes in high magnetic field
Microchannel plate photomultiplier tubes (MCP PMT) have good immunity to magnetic field and excellent time resolution. The influence of magnetic fields up to 4.5 T on the parameters of several MCP PMT designs was studied. PMTs with two, three and four MCPs were tested in magnetic fields. The tested samples have different diameters of MCP pores: 3.5, 6, 8 and 10 microns. Dependencies of the time resolution, the gain and the photoelectron collection efficiency on magnetic field are presented.