The PMT Test-Bench in Pisa

One of the seven test-bench for the R7877 Hamamatsu photomultipliers has been set into operation in Pisa. In this note we discuss the installation, the debugging and the operation of this test bench using DC light (Step 1). Some systematics measurement have been performed in addition to the standard protocol measurements and are discussed here. Only a small emphasis is given to the results obtained on the first half (750) of PMTs tested because this point needs to be addressed in a wider contest within all the seven collaborating institutes. Finally, with a slight modification of the apparatus, the photocatode uniformity for a set of 16 PMTs has been measured.