Speaker
Description
For the High-Luminosity LHC, the CMS detector will undergo a significant upgrade that includes the installation of the High Granularity Calorimeter (HGCAL), which will employ 8-inch n-on-p silicon sensors. To ensure their reliable operation under the extreme radiation environment of HL-LHC, dedicated studies of surface radiation damage in the SiO₂ passivation layer are being carried out. These studies aim both to evaluate the radiation tolerance of the SiO₂ selected for the HGCAL sensors and to compare the quality and behaviour of different oxide variants for future high-energy physics experiments. The surface radiation damage is studied by means of X-ray irradiation with a fully automated measurement setup, enabling systematic characterisation of dedicated test structures. This talk will present results from the X-ray irradiation studies across multiple test structures and will compare the experimental findings with TCAD simulations.