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The new generation silicon detectors require more efficient cooling of the front-end electronics and the silicon sensors themselves. To minimize reverse annealing of the silicon sensors the cooling temperatures need to be reduced. Other important requirements of the new generation cooling systems are a reduced mass and a maintenance free operation of the hardware inside the detector. Evaporative CO 2 cooling systems are ideal for this purpose as they need smaller tubes than conventionaldoi:10.5170/cern-2008-008.328 fatcat:qxpodmgjb5hota2ugb2ncmcoym