Hungarian Participation in JUICE Project of European Space Agency

JUICE - JUpiter ICy moons Explorer - is the first large-class mission of ESA (European Space Agency). Planned for launch in Sept 2022 and arrival at Jupiter in 2029, it will spend at least three years making detailed observations of the giant gaseous planet Jupiter and three of its largest moons, Ganymede, Callisto and Europa. Space technical team developed power supply unit for PEP (Particle Enviroment Package) instrument. PEP and its sensors will examine the plasma environment in the Jovian system. PEP will measure density and fluxes of positive and negative ions, electrons, exospheric neutral gas, thermal plasma and energetic neutral atoms. The nominal onboard voltage is 28 V on the space probe. Space technical team had a job to develop power supply unit DCC (Direct Current Converter) for the sensors of PEP. The job was a great challenge because of the required high reliability and that reliable operation had to be ensured in extreme circumstances. We present in this article the realization of DCC. The DCC required for its tests to develop a special test equipment called EGSE (Electronic Ground Support Equipment). The EGSE was developed by the SGF Ltd. and supports checks of DCC. In this article we present the DCC, the quality insurance methods and the tests carried out by EGSE.