Speaker
Description
The ALICE (A Large Ion Collider Experiment) experiment at CERN is undergoing a major upgrade of its Inner Tracking System (ITS) detector. The new ITS will have seven concentric cylindrical layers of monolithic active pixel sensors ALPIDEs, which are based on the 180 nm CMOS technology by TowerJazz. It is expected that during their operation, the sensors in the innermost layer will obtain a total ionization dose (TID) of 270 krad and 10$^{12}\,$1 MeV n$_{\rm{eq}}$ cm$^{-2}$ of non-ionizing energy loss (NIEL). The project proposal however expects that the sensors should sustain ten times higher radiation loads. Radiation hardness of ALPIDE sensors was studied using a 30 MeV proton beam provided by the U-120M cyclotron of the Nuclear Physics Institute of the Czech Academy of Sciences in Řež. The poster will present results from these radiation hardness studies and we will show that the ALPIDE sensor fulfils the technical design requirements in terms of radiation hardness.
