  The Cryogenic Underground Observatory for Rare Events (CUORE) experiment at
Gran Sasso National Laboratory of INFN searches for neutrinoless double beta
decay using TeO2 crystals as cryogenic bolometers. The sensitivity of the
measurement heavily depends on the energy resolution of the detector, therefore
the success of the experiment stands on the capability to provide an extremely
low noise environment. One of the most relevant sources of noise are the
mechanical vibrations induced by the five Pulse Tube cryocoolers used on the
cryogenic system which houses the detectors. To address this problem, we
developed a system to control the relative phases of the pulse tube pressure
oscillations, in order to achieve coherent superposition of the mechanical
vibrations transmitted to the detectors. In the following, we describe this
method and report on the results in applying it to the CUORE system.
