Near Future Upgrades for the CMS Pixel Detector

The silicon pixel detector is the innermost component of the CMS tracking system, providing high precision space point measurements of charged particle trajectories. The current pixel detector is designed to operate at a maximum luminosity of 1 × 1034cm−2s−1. Before 2018 the instantaneous luminosity of the LHC is expected to reach 2 × 1034cm−2s−1, which will significantly increase the number of interactions per bunch crossing. The performance of the current pixel detector in such high occupancy environment will be degraded due to substantial data-loss and effects of radiation damage of sensors, built up over the operational period. In order to maintain or exceed its current performance, the CMS pixel detector will be replaced by a new lightweight system with additional detection layers, better acceptance and improved readout electronics. The upgraded pixel detector will provide improved track and vertex reconstruction, standalone tracking capabilities, as well as identification of particles with longer lifetimes, which will be crucial elements of many physics analyses. Presented at PIXEL2014 International Workshop on Semiconductor Pixel Detectors for Particles and Imaging Preprint typeset in JINST style HYPER VERSION Near Future Upgrades of the CMS Pixel Detector A. Kumar ∗ State University of New York at Buffalo, Buffalo, NY, 14260, USA. E-mail: [email protected] ABSTRACT: The silicon pixel detector is the innermost component of the CMS tracking system, providing high precision space point measurements of charged particle trajectories. The current pixel detector is designed to operate at a maximum luminosity of 1× 1034cm−2s−1. Before 2018 the instantaneous luminosity of the LHC is expected to reach 2× 1034cm−2s−1, which will significantly increase the number of interactions per bunch crossing. The performance of the current pixel detector in such high occupancy environment will be degraded due to substantial data-loss and effects of radiation damage of sensors, built up over the operational period. In order to maintain or exceed its current performance, the CMS pixel detector will be replaced by a new lightweight system with additional detection layers, better acceptance and improved readout electronics. The upgraded pixel detector will provide improved track and vertex reconstruction, standalone tracking capabilities, as well as identification of particles with longer lifetimes, which will be crucial elements of many physics analyses. The silicon pixel detector is the innermost component of the CMS tracking system, providing high precision space point measurements of charged particle trajectories. The current pixel detector is designed to operate at a maximum luminosity of 1× 1034cm−2s−1. Before 2018 the instantaneous luminosity of the LHC is expected to reach 2× 1034cm−2s−1, which will significantly increase the number of interactions per bunch crossing. The performance of the current pixel detector in such high occupancy environment will be degraded due to substantial data-loss and effects of radiation damage of sensors, built up over the operational period. In order to maintain or exceed its current performance, the CMS pixel detector will be replaced by a new lightweight system with additional detection layers, better acceptance and improved readout electronics. The upgraded pixel detector will provide improved track and vertex reconstruction, standalone tracking capabilities, as well as identification of particles with longer lifetimes, which will be crucial elements of many physics analyses.