For a practical superconducting quantum interference device(SQUID) based measurement system,the Tesla/volt coefficient must be accurately calibrated.In this paper,we propose a highly efficient method of calibrating a SQUID magnetometer system using three orthogonal Helmholtz coils.The Tesla/volt coefficient is regarded as the magnitude of a vector pointing to the normal direction of the pickup coil.By applying magnetic fields through a three-dimensional Helmholtz coil,the Tesla/volt coefficient can be direc...
【英文摘要】
For a practical superconducting quantum interference device(SQUID) based measurement system,the Tesla/volt coefficient must be accurately calibrated.In this paper,we propose a highly efficient method of calibrating a SQUID magnetometer system using three orthogonal Helmholtz coils.The Tesla/volt coefficient is regarded as the magnitude of a vector pointing to the normal direction of the pickup coil.By applying magnetic fields through a three-dimensional Helmholtz coil,the Tesla/volt coefficient can be direc...
【基金】
Project supported by the“Strategic Priority Research Program(B)”of the Chinese Academy of Sciences(Grant No.XDB04020200);
the Shanghai Municipal Science and Technology Commission Project,China(Grant No.15DZ1940902)
【更新日期】
2016-06-13
【分类号】
TP212
【正文快照】
1.IntroductionAs an extremely sensitive magnetic sensor,superconduct-ing quantum interference devices(SQUIDs)are widely usedfor the very weak magnetic field measurements,such as mag-netocardiography(MCG),fetal MCG,magnetoencephalogra-phy(MEG),etc.[1,2]SQU
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