The commissioning of the CUORE experiment: the mini-tower run

CUOREis a ton-scale experiment approaching the data taking phase in Gran Sasso National Laboratory. Its primary goal is to search for the neutrinoless double-beta decayin Te-130 using 988 crystals of tellurim dioxide. The crystals are operated as bolometersat about 10 mK taking advantage of one of the largest dilution cryostatever built. Concluded in March 2016, the cryostatcommissioning consisted in a sequence of cool downruns each one integratingnew partsof the apparatus. The last run was performed with the fully configured cryostatand the thermal load at 4 K reached the impressive mass of about 14 tons. During that run the base temperature of 6.3 mK was reached and maintained for more than 70 days. An array of 8 crystals, called mini-tower, was used to check bolometersoperation, readout electronics and DAQ. Results will be presented in terms of cooling power, electronic noise, energy resolution and preliminary background measurements.