Speaker
Description
In the high-luminosity LHC era, CMS will see an unprecedented number of collisions per bunch crossing, calling for a full Phase-2 upgrade of the detector. In particular, to meet the 1% precision goal for luminosity measurement per year, the development of a new luminosity-dedicated detector and the adaptation of CMS subsystems for this purpose is required. In the present contribution, we summarize recent efforts to optimize the design of the new Fast Beam Condition Monitor, together with its dedicated front- and back-end electronics and firmware. These culminated in dedicated testbeam measurements at CERN that allowed to characterize alternative Si-pad sensor designs, study their post-irradiation performance, and make front-end design choices with particular emphasis on the noise characteristics; yielding important findings towards the finalization of the system design. In line with the CMS strategy of having several independent luminosity measurements, the testbeam campaign also allowed the successful validation of another main luminometer system based on the Tracker Endcap Pixel detector using real-time pixel cluster counting in FPGA. In this case, the focus has been on the detector backend online processing and decoding algorithms and firmware validation techniques. The extensive tests point to possible further improvements for the final operation scenario.
| Primary experiment | CMS collaboration |
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