At CERN, at least two different projects use electron sources, the first one to be presented is the photo-injector used on AWAKE (plasma wakefield acceleration). In this case, a long proton bunch extracted from the SPS interacts with a high power laser and a 10 m long rubidium vapour plasma cell to create strong wakefields allowing sustained electron acceleration. The electron beam to probe these wakefields is created by an electron accelerator consisting of an RF-gun and a booster structure to accelerate the electron beam to 16 MeV. This electron source provide beams with intensities between 0.1 to 1 nC, bunch lengths between 0.3 and 3 ps and an emittance of the order of 2 mm mrad. The second electron source presented will be LEETCHI, the high current electron source demonstrator for the CLIC project at CERN, which produces 140 keV, 4.5 A, 140 µs electron beams at a repetition rate of 50 Hz. The beam is produced by the thermionic cathode, then diagnosed and dumped in a graphite collector. The shot-to-shot and flat top current stability has to be better than 0.1 %.
The installation of the AWAKE electron line started in early 2017 and the commissioning will take place at the end 2017. The layout of the electron accelerator and transfer line, the diagnostics, the installations status will be presented. On LEETCHI, numerous experiments were carried out and then completed and compared with simulations. These simulations useful to understand the influence of the cathode and its grid on the beam emittance will be presented and compared to the experimental results.