抄録
We developed a new type of magnetometer to measure low-frequency magnetic fields with an operational principle based on magnetic flux transfer and modulation. This magnetometer consists of three coils: pickup, input and readout coils. The pickup and input coils were made from high-critical-temperature superconductor (HTS) tape and were connected with very low connection resistance to form a closed loop. The magnetic flux that is collected by the pickup coil can be transferred to the input coil even at low frequencies below 1 Hz. The magnetic flux at the input coil is then detected by the readout coil using a readout scheme based on modulation of the mutual inductance M between the input and readout coils. To modulate M over time, a magnetic wire was inserted into the readout coil and a time-varying current was supplied to the wire. Using this time-varying M, the magnetic flux is converted into an amplitude-modulated voltage across the readout coil for measurements. A prototype magnetometer was fabricated for demonstration. This magnetometer can operate at low frequencies down to f = 0.5 Hz without responsivity degradation. The magnetic field noise levels were 8 and 60 pT/Hz 1/2 at 50 and 1 Hz, respectively.
| 元の言語 | 英語 |
|---|---|
| 記事番号 | 012058 |
| ジャーナル | Journal of Physics: Conference Series |
| 巻 | 1054 |
| 発行部数 | 1 |
| DOI | |
| 出版物ステータス | 出版済み - 7 26 2018 |
| イベント | 30th International Symposium on Superconductivity, ISS 2017 - Tokyo, 日本 継続期間: 12 13 2017 → 12 15 2017 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
これを引用
Magnetometer based on transfer and modulation of magnetic flux using high-critical-temperature superconductor coils. / Enpuku, Keiji; Matsuo, M.; Yoshida, Y.; Yamashita, S.; Sasayama, Teruyoshi; Yoshida, Takashi.
：: Journal of Physics: Conference Series, 巻 1054, 番号 1, 012058, 26.07.2018.研究成果: ジャーナルへの寄稿 › Conference article
}
TY - JOUR
T1 - Magnetometer based on transfer and modulation of magnetic flux using high-critical-temperature superconductor coils
AU - Enpuku, Keiji
AU - Matsuo, M.
AU - Yoshida, Y.
AU - Yamashita, S.
AU - Sasayama, Teruyoshi
AU - Yoshida, Takashi
PY - 2018/7/26
Y1 - 2018/7/26
N2 - We developed a new type of magnetometer to measure low-frequency magnetic fields with an operational principle based on magnetic flux transfer and modulation. This magnetometer consists of three coils: pickup, input and readout coils. The pickup and input coils were made from high-critical-temperature superconductor (HTS) tape and were connected with very low connection resistance to form a closed loop. The magnetic flux that is collected by the pickup coil can be transferred to the input coil even at low frequencies below 1 Hz. The magnetic flux at the input coil is then detected by the readout coil using a readout scheme based on modulation of the mutual inductance M between the input and readout coils. To modulate M over time, a magnetic wire was inserted into the readout coil and a time-varying current was supplied to the wire. Using this time-varying M, the magnetic flux is converted into an amplitude-modulated voltage across the readout coil for measurements. A prototype magnetometer was fabricated for demonstration. This magnetometer can operate at low frequencies down to f = 0.5 Hz without responsivity degradation. The magnetic field noise levels were 8 and 60 pT/Hz 1/2 at 50 and 1 Hz, respectively.
AB - We developed a new type of magnetometer to measure low-frequency magnetic fields with an operational principle based on magnetic flux transfer and modulation. This magnetometer consists of three coils: pickup, input and readout coils. The pickup and input coils were made from high-critical-temperature superconductor (HTS) tape and were connected with very low connection resistance to form a closed loop. The magnetic flux that is collected by the pickup coil can be transferred to the input coil even at low frequencies below 1 Hz. The magnetic flux at the input coil is then detected by the readout coil using a readout scheme based on modulation of the mutual inductance M between the input and readout coils. To modulate M over time, a magnetic wire was inserted into the readout coil and a time-varying current was supplied to the wire. Using this time-varying M, the magnetic flux is converted into an amplitude-modulated voltage across the readout coil for measurements. A prototype magnetometer was fabricated for demonstration. This magnetometer can operate at low frequencies down to f = 0.5 Hz without responsivity degradation. The magnetic field noise levels were 8 and 60 pT/Hz 1/2 at 50 and 1 Hz, respectively.
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UR - http://www.scopus.com/inward/citedby.url?scp=85051341777&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1054/1/012058
DO - 10.1088/1742-6596/1054/1/012058
M3 - Conference article
AN - SCOPUS:85051341777
VL - 1054
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012058
ER -