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The lifetime of trapped ion ensembles corresponds to a crucial parameterdetermining the potential scalability of their prospective applications and isoften limited by the achievable vacuum level in the apparatus. We report on therealization of a room-temperature $^{40}{\rm Ca}^{+}$ ion trapping vacuumapparatus with unprecedentedly low reaction rates of ions with a dominantvacuum contaminant: hydrogen. We present our trap assembly procedures andhydrogen pressure characterization by analysis of the CaH$^+$ moleculeformation rate.

A room-temperature ion trapping apparatus with hydrogen partial pressure below $10^{-11}$ mBar