R&D Mechanics and Cooling of the CMS Forward Pixel Detector for the HL-LHC

To cope with High Luminosity LHC data taking conditions, the CMS Inner Tracker will be rebuilt for Phase II Upgrades. This comes with a host of challenges for routing the cooling and electrical services, and optical cabling in the Inner Tracker, especially through the Service Cylinder connecting the Tracker Forward Pixel Detector (TFPX) and the Tracker Barrel Pixel Detector (TBPX). We describe our solutions to these challenges. Furthermore, to test prototypes and commission these detector structures during the R&D phase or before their decent into the experimental cavern, a user friendly 2 kW mobile CO₂ test station was developed at CERN together with Cornell University. We will discuss design and preliminary results using these machines.