'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
Results are reported from beam tests of prototype silicon pixel sensors and front-end electronics with analog readout developed for use in the ATLAS experiment at the Large Hadron Collider (LHC).Both irradiated and unirradiated assemblies were tested for chargecollection, efficiency and position resolution measurements. These indicate that n+ in n silicon pixel detectors with p-spray isolationcan operate after irradiation to fluences of up to 10**15 neq/cm2without significant degradation in performance. The depletion depthof irradiated sensors was measured and their behaviour in a magnetic field was studied. The Lorentz angle was found to decrease significatively after irradiation. Comparison between performance on spatial resolutionwith digital or analogical readout is also presented
