Speaker
Description
This presentation describes the test beam studies of 3D silicon sensors (pitch 50x50 µm2 ) exposed to a 120 GeV proton beam at the Fermilab Test Beam Facility. We show the pixel efficiency, cluster size and hit resolution before and after irradiation. The 3D silicon sensors are considered for the innermost layers of the Inner Tracker (IT) of the Phase-2 upgrade of CMS Detector. This detector is expected to operate at a peak instantaneous luminosity of 7.5x10³⁴ cm⁻² s⁻¹, resulting in a total fluence of 2.3 x 10¹⁶ neq/cm² at the innermost layer of the IT, in center of the CMS detector. The IT must separate particle tracks in extremely dense collision debris: 140-200 collisions per bunch crossing. These conditions require thin, highly granular sensor components and readout chips that are radiation-tolerant, fast, and efficient.
