Simulation and hit reconstruction of irradiated pixel sensors for the CMS experiment

Physics – Instrumentation and Detectors

Scientific paper

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5 pages, 5 figures, presented at the Workshop on Tracking in High Multiplicity Environments (TIME2005), October 3-7 2005, Zuri

Scientific paper

10.1016/j.nima.2006.05.027

In this paper a detailed simulation of irradiated pixel sensors was used to investigate the effects of radiation damage on the position determination and optimize the hit reconstruction algorithms. The simulation implements a model of radiation damage by including two defect levels with opposite charge states and trapping of charge carriers. The simulation shows that a position resolution below 15 $\mu$m along the CMS $r-\phi$ plane can be achieved after an irradiation fluence of $5.9\times10^{14}$ n$_{\rm{eq}}/$cm$^2$. In addition, we show that systematic errors in the position determination can be largely reduced by applying $\eta$ corrections.

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