DocumentCode
3447339
Title
The Approaches of Decreasing Measurement Uncertainty of CCC
Author
Zhang, Zhonghua ; He, Qing ; Li, Zhengkun ; Liu, Yong
Author_Institution
Nat. Inst. of Metrol., Beijing
fYear
2004
fDate
38139
Firstpage
354
Lastpage
355
Abstract
The uncertainty source in measurement with CCC apparatus is discussed. Experiment shows that the uncertainty in operation of CCC is mainly from the pressure fluctuation of helium gas in cryostat. Some approaches of decreasing the uncertainty are proposed. In addition, increasing the turn number of the CCC windings can improve the S/N ratio in measurement and is also effective for decreasing the measurement uncertainty
Keywords
cryostats; current comparators; measurement uncertainty; CCC apparatus; S/N ratio; cryogenic current comparator; cryostat; helium gas; measurement uncertainty; pressure fluctuation; Cooling; Fluctuations; Helium; Joining processes; Low pass filters; Measurement uncertainty; SQUIDs; Standards development; Superconducting device noise; Wires;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location
London
Print_ISBN
0-7803-8494-6
Electronic_ISBN
0-7803-8494-6
Type
conf
DOI
10.1109/CPEM.2004.305611
Filename
4097266
Link To Document