出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：IceCube is a huge neutrino telescope with 1 km3 instrumented volume to aim for detecting astrophysical
sources. A Digital Optical Module (DOM) is a module for IceCube which consists
of a 10-inch diameter PMT supported by coupling gel, a signal processing electronics board, an
LED flasher board and the photo-multiplier tubes (PMT) base with high-voltage supplier. The
PMT is the HAMAMATSU R7081 with 10 dynodes, which has exhibited good charge resolution
and low noise. The PMTs and DOMs are calibrated and characterized in a laboratory. We made
several measurements of saturation behavior, photo-cathode uniformity mapping with an absolute
quantum and collection efficiency and it’s dependences on photon hit position on the cathode surface.
We show that both PMT and DOM measurements are consistent over the wavelengths by
comparing the DOM data and the simulation based on the PMT data.
