Characterization of a GHz non-adiabatic single-electron pump using a cryogenic current comparator

We use a cryogenic current comparator with primary/secondary winding ratio of N_P:N_S=4501:1 to scale up the current from a non-adiabatic single-charge pump. The up-scaled current, I_S, is traceably characterized with systematic uncertainty of 1 ppm. For high pumping frequencies f = 1.2 GHz the absolute value and local shape of the up-scaled current plateau agree with theoretical predictions within the type A uncertainty of 10 ppm. We determine I_S at optimum pump parameters to be reduced by 10 ppm from the reference value I₀ = efN_P/N_S in accordance with the pump model, demonstrating stable current-scaling of high-frequency non-adiabatic pumps.