Designing and implementation of electron monochromator

\nAt the upgrade in 2018, ALICE plans to replace the inner tracking system (ITS) with silicon pixel detectors. This is the first time at Large Hadron Collider (LHC) at CERN that monolithic active pixel detectors are the base line technology. In order to characterise the performance of the pixel detectors either radioactive sources or test beams are used. \n\nAs the usage of test beam requires travelling with the measurement setup to an available test beam location and that takes effort from the actual development work. Sr-90 emits electrons of minimum ionizing particle (MIP) energies. As the beta decay is three body decay, the electron energy distribution also possess significant amount of low energy electrons, which are not minimum ionizing particles. Monochromatic Sr-90 source would be a considerable substitute for test beams in some situations.\n\n\nAim of this work is to design and implement a monochromatic electron source. The monochromatic electron source is produced by using a magnetic field as energy filter. After the production the characteristics of the produced electron monochromator are tested.