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The field-to-voltage transfer coefficient (∂ B/∂ V) is an important parameter of the multi-channel superconducting quantum interference device (SQUID) magnetic detecting system. The SQUID devices and the readout circuits have the inevitable differences among different channels, so the accurate calibration of system channels is rather significant. In this paper, We first used the circular PCB coils for 36-channel MCG system calibration, and the other one is based on a traditional method in which a uniform field is produced by square Helmholtz coil. The calibration data show that the results are basically the same. The calibrated ∂ B/∂ V values using circular PCB coils are in a range from 1.46-1.73 pT·mV-1. And those of square Helmholtz coils are mostly within a range from 1.56-1.64 pT·mV-1.
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Keywords:
- superconducting quantum interference device /
- magnetic detect /
- field-to-voltage transfer coefficient /
- calibration of system channels
[1] John C, Alex I B 2004 The SQUID Handbook Vol.1 Fundamentals and Technology of SQUIDs and SQUID Systems (Weinheim: Wiley-Vch Verlag GmbH & Co. KGaA) p137
[2] Zhang S L, Zhang G F, Wang Y L, Liu M, Li H, Qiu Y, Zeng J, Kong X Y, Xie X M 2013 Chin. Phys. B 22 128501
[3] Kong X Y, Zhang S L, Wang Y L, Zeng J, Xie X M 2012 Phys. Procedia 36 286
[4] Brisinda D, Meloni A M, Fenici R 2004 Neurology and Clinical Neurophysiology 2004 8
[5] Ornelas P H, Bruno A C, Barbosa Hall C, Andrade Lima E, Costa Ribeiro P 2003 Supercond Sci Technol 16 427
[6] Lee S G, Kang C S, Chang J W 2007 IEEE Trans. Appl. Supercond. 17 2
[7] Alldred J C, Scollar I 1967 J. Sci. Instrum. 44 755
[8] Tan X, Liu J, Yin J L, Li Q D 2011 J. Magn. Mater. Dev. 43 52 (in Chinese) [谭曦, 刘军, 殷建玲, 李清东 2011 磁性材料与器件 43 52]
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[1] John C, Alex I B 2004 The SQUID Handbook Vol.1 Fundamentals and Technology of SQUIDs and SQUID Systems (Weinheim: Wiley-Vch Verlag GmbH & Co. KGaA) p137
[2] Zhang S L, Zhang G F, Wang Y L, Liu M, Li H, Qiu Y, Zeng J, Kong X Y, Xie X M 2013 Chin. Phys. B 22 128501
[3] Kong X Y, Zhang S L, Wang Y L, Zeng J, Xie X M 2012 Phys. Procedia 36 286
[4] Brisinda D, Meloni A M, Fenici R 2004 Neurology and Clinical Neurophysiology 2004 8
[5] Ornelas P H, Bruno A C, Barbosa Hall C, Andrade Lima E, Costa Ribeiro P 2003 Supercond Sci Technol 16 427
[6] Lee S G, Kang C S, Chang J W 2007 IEEE Trans. Appl. Supercond. 17 2
[7] Alldred J C, Scollar I 1967 J. Sci. Instrum. 44 755
[8] Tan X, Liu J, Yin J L, Li Q D 2011 J. Magn. Mater. Dev. 43 52 (in Chinese) [谭曦, 刘军, 殷建玲, 李清东 2011 磁性材料与器件 43 52]
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