Ecklund, Karl M2014-10-172014-10-172013-122013-08-15December 2Zabel, James. "Occupancy Study of the CMS Pixel Subdetector for the Phase 1 Upgrade." (2013) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/77602">https://hdl.handle.net/1911/77602</a>.https://hdl.handle.net/1911/77602The Phase 1 Upgrade for CMS includes the installation of a new pixel subdetector, complete with newly designed readout chips as well as a new geometry. This upgrade is necessary to replace the existing irradiated pixel subdetector with one designed for higher instantaneous luminosities. It also provides an opportunity to improve the resolution of track reconstruction and vertex isolation. The new geometry and higher beam energies available after the upgrade increase the flux of ionizing radiation traveling through the pixel subdetector. Results of a simulation that estimate pixel hits, and thus provide an opportunity to estimate data rates and flux, will be shown. The simulation incorporates a variety of factors affecting the estimated data rates and flux, including various luminosities, bunch spacings, and beam spot locations. The simulation determines the number of data links per module necessary to maintain data rates within design limitations.application/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.LHCCMSPixel detectorOccupancyParticle physicsThesis2014-10-17