Abstract
We carried out a careful evaluation of the behaviour of the large cathode area Hamamatsu R5912-MOD and R5912-2-MOD photomultiplier tubes operating at cryogenic temperature. The measurements were focused on evaluating the parameters which mainly characterize the operating performances of the devices down to 77K. The results that we obtained demonstrate that both photomultipliers models are suited, with some distinguishing characteristics, for light detection in such unconventional operating conditions, certifying the devices for the direct measurement of scintillation light coming from noble-gas liquids in detectors dedicated to neutrino physics and Dark Matter research.
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