Improvement of sensitivity of a compact magnetometer by using HTS-SQUID with rotating sample

Daichi Hamasaki; Naohiro Okamoto; Mohd Mawardi Saari; Kenji Sakai; Toshihiko Kiwa; Keiji Tsukada

doi:10.1002/eej.22732

Improvement of sensitivity of a compact magnetometer by using HTS-SQUID with rotating sample

Daichi Hamasaki, Naohiro Okamoto, Mohd Mawardi Saari, Kenji Sakai, Toshihiko Kiwa, Keiji Tsukada

Research output: Contribution to journal › Article › peer-review

Abstract

We have improved a previously developed compact magnetometer using HTS-SQUID with a rotating sample. In the previous system, attenuation of the rotational speed had resulted in deformation of the averaged waveform signal, reducing the reproducibility of measurements. In this paper, we have used a better motor in order to decrease the attenuation of the rotational speed for precise averaging of the output signal and improvement of the signal-to-noise ratio. To improve sensitivity, we also optimized the pickup coil and compared the signal-to-noise ratio of circular and elliptical pickup coils having the same number of turns, resistance, and inductance. As a result, the signal-to-noise ratio was improved with high accuracy and the magnetometer showed a susceptibility sensitivity of 3.8× 10^-9 emu.

Original language	English
Pages (from-to)	9-14
Number of pages	6
Journal	Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume	194
Issue number	2
DOIs	https://doi.org/10.1002/eej.22732
Publication status	Published - Jan 2016

Keywords

HTS-SQUID
diamagnetism
magnetometer
rotating sample

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1002/eej.22732

Cite this

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title = "Improvement of sensitivity of a compact magnetometer by using HTS-SQUID with rotating sample",

abstract = "We have improved a previously developed compact magnetometer using HTS-SQUID with a rotating sample. In the previous system, attenuation of the rotational speed had resulted in deformation of the averaged waveform signal, reducing the reproducibility of measurements. In this paper, we have used a better motor in order to decrease the attenuation of the rotational speed for precise averaging of the output signal and improvement of the signal-to-noise ratio. To improve sensitivity, we also optimized the pickup coil and compared the signal-to-noise ratio of circular and elliptical pickup coils having the same number of turns, resistance, and inductance. As a result, the signal-to-noise ratio was improved with high accuracy and the magnetometer showed a susceptibility sensitivity of 3.8× 10-9 emu.",

keywords = "HTS-SQUID, diamagnetism, magnetometer, rotating sample",

author = "Daichi Hamasaki and Naohiro Okamoto and Saari, {Mohd Mawardi} and Kenji Sakai and Toshihiko Kiwa and Keiji Tsukada",

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AU - Hamasaki, Daichi

AU - Okamoto, Naohiro

AU - Saari, Mohd Mawardi

AU - Sakai, Kenji

AU - Kiwa, Toshihiko

AU - Tsukada, Keiji

PY - 2016/1

Y1 - 2016/1

N2 - We have improved a previously developed compact magnetometer using HTS-SQUID with a rotating sample. In the previous system, attenuation of the rotational speed had resulted in deformation of the averaged waveform signal, reducing the reproducibility of measurements. In this paper, we have used a better motor in order to decrease the attenuation of the rotational speed for precise averaging of the output signal and improvement of the signal-to-noise ratio. To improve sensitivity, we also optimized the pickup coil and compared the signal-to-noise ratio of circular and elliptical pickup coils having the same number of turns, resistance, and inductance. As a result, the signal-to-noise ratio was improved with high accuracy and the magnetometer showed a susceptibility sensitivity of 3.8× 10-9 emu.

AB - We have improved a previously developed compact magnetometer using HTS-SQUID with a rotating sample. In the previous system, attenuation of the rotational speed had resulted in deformation of the averaged waveform signal, reducing the reproducibility of measurements. In this paper, we have used a better motor in order to decrease the attenuation of the rotational speed for precise averaging of the output signal and improvement of the signal-to-noise ratio. To improve sensitivity, we also optimized the pickup coil and compared the signal-to-noise ratio of circular and elliptical pickup coils having the same number of turns, resistance, and inductance. As a result, the signal-to-noise ratio was improved with high accuracy and the magnetometer showed a susceptibility sensitivity of 3.8× 10-9 emu.

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KW - diamagnetism

KW - magnetometer

KW - rotating sample

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Improvement of sensitivity of a compact magnetometer by using HTS-SQUID with rotating sample

Abstract

Keywords

ASJC Scopus subject areas

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