Photocathode Characterisation Setup Development and Testing

This project was conducted within the Gas Detectors Development (GDD) group at CERN. The main goal was to build a setup that will allow photocathode characterisation and ageing effects measurements. The setup built allowed the irradiation of photocathodes with different wavelengths, from 110 nm to 250 nm, and supported an ion irradiation chamber to study ageing effects. The results show the expected wavelength-dependent quantum efficiency of CsI photocath- odes but they do not represent absolute values due to issues while assembling the setup. When the setup is completed, absolute values of the photocathodes' quantum efficiencies and a full comprehension of the effects of the overtime use of photocathodes will be possible to study.