Optimum sensitivity of an externally shielded cryogenic current comparator

被引：13

作者：

Early, MD

Jones, K

机构：

[1] Measurement Standards Laboratory, New Zealand Institute for Industrial Research and Development, Lower Hutt

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1997年 / 46卷 / 02期

关键词：

D O I：

10.1109/19.571884

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The 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 toil 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.

引用

页码：459 / 462

页数：4

共 7 条

[1]

GROVER FW, 1962, INDUCTANCE CALCULATI, P77

[2] A CALCULATION OF THE EFFECT OF COAXIAL SUPERCONDUCTING SHIELDS ON THE FLUX SENSITIVITY OF SQUID PICK-UP COILS [J].