Detector multi-pixel

Advances in XDI over the years have been enabled by technological innovations, particularly in the fields of multi-foci, high-radiance X-ray sources and pixellated energyresolving semiconductor detectors. The technological realization of a proposed next-generation XDI device will be discussed in Section 5. 

The CMS experiment—one of the four large LHC experiments— is a general-purpose detector designed to optimally exploit the physics potential of the LHC. Located inside the superconducting solenoid, which provides a 3.8 Tesla held, are the hadronic and electromagnetic calorimeters as well as the tracking system. The latter is based on silicon pixels and silicon strip detectors, with a total sUicon area of 210 m. A multi-layer muon system embedded in the return yoke outside the solenoid completes the CMS detector. 

The optical signals pass four connection points before they are translated into electronic signals in the FED modules in the service room a single-fiber (MU) connection on the supply tube located at 2 m distance from the laser, a multi-fiber (ribbon) connection at the pixel detector PPO at a distance of 3 m, a multi-ribbon connection at the strip tracker PPl at 7 m distance and a connection to the FED modules at 63 m distance. The latter connection at the strip tracker end-flange was not accessible anymore at the time of the BPIX installation. 

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