TY - JOUR
T1 - Magnetometer exploiting inductance modulation in coils made of high-critical-temperature superconductor
AU - Enpuku, Keiji
AU - Matsuo, Masaaki
AU - Sasayama, Teruyoshi
AU - Yoshida, Takashi
N1 - Funding Information:
Acknowledgments This work was partly supported by a Grant-in-Aid for Scientific Research (S) JP15H05764 from the Japan Society for the Promotion of Science.
PY - 2017/11
Y1 - 2017/11
N2 - We developed a magnetometer for measuring low-frequency magnetic fields. The magnetometer consists of two coils, namely, pickup and modulation coils made of high-critical-temperature superconducting material. The inductance of the modulation coil is modulated with time, and the magnetic field signal is converted to an amplitude-modulated voltage across the modulation coil. The prototype magnetometer can operate at low frequencies down to f = 0.01 Hz without diminishing the response. The noise in the magnetic field signal is 40 pT/Hz1/2 at 10 Hz. An order of magnitude improvement will be possible with a modulation coil of suitable geometry.
AB - We developed a magnetometer for measuring low-frequency magnetic fields. The magnetometer consists of two coils, namely, pickup and modulation coils made of high-critical-temperature superconducting material. The inductance of the modulation coil is modulated with time, and the magnetic field signal is converted to an amplitude-modulated voltage across the modulation coil. The prototype magnetometer can operate at low frequencies down to f = 0.01 Hz without diminishing the response. The noise in the magnetic field signal is 40 pT/Hz1/2 at 10 Hz. An order of magnitude improvement will be possible with a modulation coil of suitable geometry.
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U2 - 10.7567/APEX.10.113101
DO - 10.7567/APEX.10.113101
M3 - Article
AN - SCOPUS:85039151706
VL - 10
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 11
M1 - 113101
ER -