Title :
Influence of liquid helium level on dip probe wiring
Author :
Kinard, Joseph R. ; Lipe, Thomas E.
Author_Institution :
Quantum Meas. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
During the investigation into operation of the NIST AC Josephson Voltage Standard pulsed array at frequencies up to 1 MHz, measurements showed unexplained day-to-day variations associated with liquid helium (LHe) level. We report the influences on ac-dc transfer due to LHe level for three different kinds of output wiring: twisted pair, flexible coaxial cable, and semi-rigid microwave line.
Keywords :
coaxial cables; liquid helium; measurement standards; probes; twisted pair cables; voltage measurement; wiring; AC-DC transfer; LHe level influence; NIST AC Josephson Voltage Standard pulsed array; dip probe wiring; flexible coaxial cable wiring; liquid helium level influence; semirigid microwave line wiring; twisted pair wiring; unexplained day-to-day variation; Microwave measurements; Power transmission lines; Probes; Standards; Temperature measurement; Transmission line measurements; Wiring; AC-DC Difference; Josephson Effect; Microwave Transmission Lines; Voltage Measurement;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6251045
