How to upgrade a pixel detector: lessons from Phase-1 being applied to Phase-2 CMS Pixel Upgrade

Rachel Bartek

Associate Research Professor
High Energy Particle Physics
Physics Department 
The Catholic University of America 

Wed, November 6, 2024 ~ 4:00 PM

The High-Luminosity Large Hadron Collider at CERN is expected to produce proton-proton colli- sions at a center-of-mass energy of 14 TeV, aiming to achieve an unprecedented peak instantaneous luminosity of 7.5 x 1034 cm−2s−1, resulting in an average pileup of 200. To cope with these running conditions, the CMS detector will undergo an extensive upgrade: Phase-2.

This upgrade includes the complete replacement of the CMS silicon pixel detector, introducing improvements such as in- creased radiation resilience, finer granularity, and capability to manage increased data rates among other changes. This is, however, the second time CMS has replaced their pixel detector. The differ- ences and similarities between the Phase-1 and Phase-2 upgrades of the Inner Tracker of CMS will be outlined. Specific lessons learned from the operation of the Phase-1 detector will be highlighted, along with how this experience has informed the approach of the design and assembly of the Phase-2 Inner Tracker as preproduction of modules is approaching.

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