TY - JOUR
T1 - Sensitivity Improvement of Sample Rotation Measurement Method in HTS-SQUID Magnetometer for Diamagnetic Materials
AU - Nakamura, Yuta
AU - Isshiki, Ryota
AU - Takeuchi, Shun
AU - Hirata, Tetsuro
AU - Sakai, Kenji
AU - Kiwa, Toshihiko
AU - Tsukada, Keiji
N1 - Funding Information:
Manuscript received September 18, 2017; accepted February 23, 2018. Date of publication February 27, 2018; date of current version May 4, 2018. This work was supported by the “Strategic Promotion of Innovative R&D” of the Japan Science and Technology Agency (JST). (Corresponding author: Yuta Nakamura.) The authors are with the Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan (e-mail: p1w51i0v@ s.okayama-u.ac.jp; pysv5rpl@s.okayama-u.ac.jp; pa3w6btj@s.okayama-u. ac.jp; p1ok3h10@s.okayama-u.ac.jp, sakai-k@okayama-u.ac.jp; kiwa@okay ama-u.ac.jp; tsukada@cc.okayama-u.ac.jp).
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - Measuring extremely low magnetic signals of diamagnetic materials such as water and ethanol with high sensitivity is important in various fields. Ethanol is widely used as a solvent in areas such as chemical industry and drug discovery; therefore, it is important to measure its concentration with high sensitivity. We have already reported a hybrid-type magnetometer using a high temperature superconductor superconducting quantum interference device (HTS-SQUID), which can measure and evaluate magnetic characteristics by vibrating and rotating a sample. However, the signal-to-noise ratio (SNR) of the system needs to be improved as magnetic signals from diamagnetism in water and ethanol are extremely low in magnitude. In this study, digital frequency filters were applied to the signals measured by the HTS-SQUID magnetometer with a rotating sample container in order to improve the SNR of the system, and then the magnetic properties of ethanol and water were studied. As a result, the SNR of the system improved about twice the level obtained by conventional signal processing method.
AB - Measuring extremely low magnetic signals of diamagnetic materials such as water and ethanol with high sensitivity is important in various fields. Ethanol is widely used as a solvent in areas such as chemical industry and drug discovery; therefore, it is important to measure its concentration with high sensitivity. We have already reported a hybrid-type magnetometer using a high temperature superconductor superconducting quantum interference device (HTS-SQUID), which can measure and evaluate magnetic characteristics by vibrating and rotating a sample. However, the signal-to-noise ratio (SNR) of the system needs to be improved as magnetic signals from diamagnetism in water and ethanol are extremely low in magnitude. In this study, digital frequency filters were applied to the signals measured by the HTS-SQUID magnetometer with a rotating sample container in order to improve the SNR of the system, and then the magnetic properties of ethanol and water were studied. As a result, the SNR of the system improved about twice the level obtained by conventional signal processing method.
KW - Diamagnetic materials
KW - magnetic susceptibility
KW - magnetometer
KW - superconducting quantum interference device (SQUID)
KW - system improvement
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U2 - 10.1109/TASC.2018.2810088
DO - 10.1109/TASC.2018.2810088
M3 - Article
AN - SCOPUS:85042868752
SN - 1051-8223
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 4
M1 - 1601604
ER -