Journal
METROLOGIA
Volume 49, Issue 1, Pages 8-14Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0026-1394/49/1/002
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Funding
- European Community [217257]
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The Electron Counting Capacitance Standard currently pursued at PTB aims to close the Quantum Metrological Triangle with a final precision of a few parts in 107. This paper reports the considerable progress recently achieved with a new generation of single-electron tunnelling devices. A five-junction R-pump was operated with a relative charge transfer error of five electrons in 107, and was used to successfully perform single-electron charging of a cryogenic capacitor. The preliminary result for the single-electron charge quantum has an uncertainty of less than two parts in 106 and is consistent with the value of the elementary charge.
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