A direct comparison of a 10 V Josephson voltage standard between a refrigerator-basedmulti-chip programmable system and a conventional system

Abstract

A multi-chip 10 V programmable Josephson voltage standard (PJVS) systemwas demonstrated using a closed-cycle refrigerator. We precisely measured thePJVS by a direct comparison measurement with a conventional Josephsonvoltage standard. The result agreed within a combined standard uncertainty of3.9 × 10−10 at 10 V.