Author/Authors :
Allkofer، نويسنده , , Y. and Amsler، نويسنده , , C. and Bortoletto، نويسنده , , D. and Chiochia، نويسنده , , V. and Cremaldi، نويسنده , , L. and Cucciarelli، نويسنده , , S. and Dorokhov، نويسنده , , A. and Hِrmann، نويسنده , , C. and Horisberger، نويسنده , , R. and Kim، نويسنده , , D. and Konecki، نويسنده , , M. and Kotlinski، نويسنده , , D. and Prokofiev، نويسنده , , K. and Regenfus، نويسنده , , C. and Rohe، نويسنده , , T. and San، نويسنده ,
Abstract :
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 100 × 150 μ m 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.
Keywords :
pixel , Silicon , CMS , Sensors , LHC , Radiation hardness
