Radiation hardness study of HGCAL v1-prototype Si sensors

As a part of the HL-LHC upgrade of the CMS experiment, the endcap calorimeters will be replaced by the new HGCAL

High-Granularity Calorimeter. An important part of the upgrade project is the development of novel radiation-hard 8-inch

silicon sensors. We will present electrical characterization results of reactor irradiated 8-inch version 1 (v1)-prototypes,

that provide information for the tuning of the process parameters towards final sensor design.