High Tc superconducting quantum interference device magnetometer utilizing cooled copper pickup coil and resonant coupling circuit

Tong Qing Yang; Keiji Enpuku

doi:10.1143/jjap.41.l1221

High T_c superconducting quantum interference device magnetometer utilizing cooled copper pickup coil and resonant coupling circuit

Tong Qing Yang, Keiji Enpuku

Superconductive Systems Engineering Laboratory

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

10 Citations (Scopus)

Abstract

A high T_c superconducting quantum interference device (SQUID) magnetometer utilizing a copper pickup coil cooled to T = 77 K and a resonant coupling circuit was developed. Using the resonant coupling circuit, we can greatly increase the signal flux transferred to the SQUID. Cooling of the pickup coil is useful for increasing the signal flux transferred to the SQUID and for decreasing the noise of the pickup coil. As a result, we obtained a magnetic field noise of 34.8 fT/Hz^1/2 at a resonant frequency of 6.37 kHz when the pickup coil was mode of 200 μm-φ Cu wire with the number of turns n of 150 and radius of the coil r of 15 mm.

Original language	English
Pages (from-to)	L1221-L1223
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	41
Issue number	11 A
DOIs	https://doi.org/10.1143/jjap.41.l1221
Publication status	Published - Nov 1 2002

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

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10.1143/jjap.41.l1221

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title = "High Tc superconducting quantum interference device magnetometer utilizing cooled copper pickup coil and resonant coupling circuit",

abstract = "A high Tc superconducting quantum interference device (SQUID) magnetometer utilizing a copper pickup coil cooled to T = 77 K and a resonant coupling circuit was developed. Using the resonant coupling circuit, we can greatly increase the signal flux transferred to the SQUID. Cooling of the pickup coil is useful for increasing the signal flux transferred to the SQUID and for decreasing the noise of the pickup coil. As a result, we obtained a magnetic field noise of 34.8 fT/Hz1/2 at a resonant frequency of 6.37 kHz when the pickup coil was mode of 200 μm-φ Cu wire with the number of turns n of 150 and radius of the coil r of 15 mm.",

author = "Yang, {Tong Qing} and Keiji Enpuku",

year = "2002",

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day = "1",

doi = "10.1143/jjap.41.l1221",

language = "English",

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journal = "Japanese Journal of Applied Physics, Part 2: Letters",

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TY - JOUR

T1 - High Tc superconducting quantum interference device magnetometer utilizing cooled copper pickup coil and resonant coupling circuit

AU - Yang, Tong Qing

AU - Enpuku, Keiji

PY - 2002/11/1

Y1 - 2002/11/1

N2 - A high Tc superconducting quantum interference device (SQUID) magnetometer utilizing a copper pickup coil cooled to T = 77 K and a resonant coupling circuit was developed. Using the resonant coupling circuit, we can greatly increase the signal flux transferred to the SQUID. Cooling of the pickup coil is useful for increasing the signal flux transferred to the SQUID and for decreasing the noise of the pickup coil. As a result, we obtained a magnetic field noise of 34.8 fT/Hz1/2 at a resonant frequency of 6.37 kHz when the pickup coil was mode of 200 μm-φ Cu wire with the number of turns n of 150 and radius of the coil r of 15 mm.

AB - A high Tc superconducting quantum interference device (SQUID) magnetometer utilizing a copper pickup coil cooled to T = 77 K and a resonant coupling circuit was developed. Using the resonant coupling circuit, we can greatly increase the signal flux transferred to the SQUID. Cooling of the pickup coil is useful for increasing the signal flux transferred to the SQUID and for decreasing the noise of the pickup coil. As a result, we obtained a magnetic field noise of 34.8 fT/Hz1/2 at a resonant frequency of 6.37 kHz when the pickup coil was mode of 200 μm-φ Cu wire with the number of turns n of 150 and radius of the coil r of 15 mm.

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DO - 10.1143/jjap.41.l1221

M3 - Letter

AN - SCOPUS:0036871137

VL - 41

SP - L1221-L1223

JO - Japanese Journal of Applied Physics, Part 2: Letters

JF - Japanese Journal of Applied Physics, Part 2: Letters

SN - 0021-4922

IS - 11 A