Design and performance of the silicon sensors for the CMS barrel pixel detector

Details Design and performance of the silicon sensors for the CMS barrel pixel detector Design and performance of the silicon sensors for the CMS barrel pixel detector

2007-02-12

arxiv.org/abs/physics/0702092v1

Nucl.Instrum.Meth.A584:25-41,2008

Physics

Instrumentation and Detectors

22 pages, 21 figures

Scientific paper

10.1016/j.nima.2007.08.151

The CMS experiment at the LHC includes a hybrid silicon pixel detector for the reconstruction of charged tracks and of the interaction vertices. The barrel region consists of n-in-n sensors with 100X150 um^2 cell size processed on diffusion oxygenated float zone silicon. A biasing grid is implemented and pixel isolation is achieved with the moderated p-spray technique. An extensive test program was carried out on the H2 beam line of the CERN SPS. In this paper we describe the sensor layout, the beam test setup and the results obtained with both irradiated and non-irradiated prototype devices. Measurements of charge collection, hit detection efficiency, Lorentz angle and spatial resolution are presented.

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