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TY - UNPB AU - Tranquille, G. AU - Cenede, J. AU - Deschamps, S. AU - Frassier, A. AU - Jørgensen, L.V. ED - Kuzin, Maksim V. ED - Schaa, Volker RW TI - Commissioning the ELENA Electron Cooler J2 - Proc. of COOL2019, Novosibirsk, Russia, 23-27 September 2019 CY - Novosibirsk, Russia T2 - Workshop on Beam Cooling and Related Topics T3 - 12 LA - english AB - Electron cooling is central to the success of the Extra Low ENergy Antiproton (ELENA) ring which will increase by a factor of up to 100 the number of antiprotons available for the trap experiments. Cooling is needed to reduce or eliminate the emittance blow-up caused by the deceleration process and obtain the small emittance antiproton beams needed for further deceleration and extraction to the experiments. The device that has been installed on ELENA is designed to operate at electron energies below 350 eV in an ultrahigh vacuum environment and with minimum perturbation to the ring. We present the key stages of the commissioning of the cooler (magnetic measurements, installation, setting-up etc.) which culminated in the phase-space cooling of antiprotons in ELENA at energies as low as 100 keV. PB - JACoW Publishing CP - Geneva, Switzerland ER -