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TitleOptimum sensitivity of an externally shielded cryogenic current comparator
Publication TypeJournal Article
Year of Publication1997
AuthorsEarly, M.D., and Jones K.
JournalIEEE Transactions on Instrumentation and Measurement
Pagination459 - 462
Date Published1997
ISSN00189456 (ISSN)
KeywordsComparator circuits, Cryogenics, Electric coils, Electric currents, Electric network analysis, Equivalent circuits, MATHEMATICAL MODELS, Network components, Optimization, Overlapped tube cryogenic current comparator (CCC), Pick up coil, Sensitivity analysis
AbstractThe sensitivity of an overlapped-tube cryogenic current comparator (CCC) has been calculated including the effect of a cylindrical external shield. Dimensions of the shield, tube and pick-up coil can be optimized to give maximum sensitivity. The sensitivity in the case of a fixed radius shield has been numerically investigated and a CCC based on an optimized design has been constructed. A single sensitivity measurement indicates that the cylindrical-shield model is accurate to within about 20% of the measured value. This is a significant improvement compared with a simplified ring model of the shield or neglecting the shield entirely. © 1997 IEEE.

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