Cooling antihydrogen ions for the free-fall experiment GBAR

摘要: We discuss an experimental approach allowing to prepare antihydrogen atoms for the GBAR experiment. study feasibility of all necessary steps: The capture incoming $\bar{\rm H}^+$ ions at keV energies in a deep linear RF trap, sympathetic cooling by laser cooled Be$^+$ ions, transfer miniaturized trap and Raman sideband ion pair motional ground state, further reducing momentum wavepacket adiabatic opening trap. For each step, we point out challenges efficiency characteristic times, showing that are possible within few seconds.