Direct Resistance Comparisons From the QHR to 100 Megohm Using a Cryogenic Current Comparator
Randolph Elmquist, Emmanouel S. Hourdakis, Dean G. Jarrett, Neil M. Zimmerman
Measurements of 100 megohm standard resistors and cryogenic thin-film resistors based directly on a QHR standard have been made with a cryogenic current comparator (CCC) bridge. This 15496:2 ratio CCC attains a current sensitivity of 10.7 fA/Hz1/2 in measurements of cryogenic thin-film resistors without extensive shielding or filtering. A resistive primary winding helps the CCC maintain stability in the presence of external noise. The resistive-winding technique may be useful for the absolute measurement of small currents delivered by single-electron tunneling devices.
IEEE Transactions on Instrumentation and Measurement
Single-electron tunneling, Quantum Hall effect, Resistance standards, Johnson noise
, Hourdakis, E.
, Jarrett, D.
and Zimmerman, N.
Direct Resistance Comparisons From the QHR to 100 Megohm Using a Cryogenic Current Comparator, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31719
(Accessed November 28, 2023)