Test Beam Results of SINTEF 3D Pixel Silicon Sensors

Abstract

The Inner Tracker (ITk) of the ATLAS detector must withstand extreme radiation conditions at the High Luminosity LHC (HL- LHC). 3D sensors are promising candidates for the innermost detector layers as their radiation tolerance are superior to that of conventional planar pixel sensors. The ATLAS groups in Oslo and Bergen have collaborated with SINTEF on the development of 3D sensors for many years. We present an efficiency analysis of SINTEF 3D silicon sensors. Results show high efficiencies above 96% at 60V (80V) after exposure to fluences of 1.0 (1.8) x 10ˆ16 n cmˆ-2