CMS BRIL subsystems successfully removed
Ongoing upgrades on the road to HiLumi CMS BRIL subsystems successfully removed 28 July 2026 All four CMS Beam Radiation, Instrumentation, and Luminosity (BRIL) subsystems have been fully extracted from the heart of CMS, following several years of reliable operation. Known as Margherita, Capriocciosa , Hawaii and Calzone, the modules had been placed around the beampipe to measure luminosity and…
In a significant development on July 28, 2026, the four CMS Beam Radiation, Instrumentation, and Luminosity (BRIL) subsystems were successfully removed from the heart of the CMS particle detector. These modules, named Margherita, Capriocciosa, Hawaii, and Calzone, had been tasked with measuring luminosity and beam conditions for several years.
The BRIL subsystems will be replaced with next-generation instrumentation that is designed to cope with the challenging conditions of the higher luminosity regime planned for the future High-Luminosity Large Hadron Collider (HiLumi LHC). Specifically, the Fast Beam Condition Monitor (FBCM) will step into the role of a standalone luminosity detector, while also providing precise timing information.
This enhancement will enable more accurate measurement of background conditions associated with incoming particle beams, thereby improving the overall quality of the data utilized by CMS researchers for their investigations.
The removal of these subsystems also creates space for the upcoming extraction of the Pixel and Strip detectors, which is scheduled to occur in the coming weeks. The successful removal of the BRIL subsystems marks a crucial milestone in the ongoing upgrades leading up to the HiLumi phase of the CMS experiment.
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