Relaxation-oscillation-driven DC squids

S. A. Gudoshnikov; Yu V. Maslennikov; V. K. Semenov; O. V. Snigirev; A. V. Vasiliev

doi:10.1109/20.92500

Relaxation-oscillation-driven DC squids

S. A. Gudoshnikov
, Yu V. Maslennikov
, V. K. Semenov
, O. V. Snigirev
, A. V. Vasiliev

Physics and Astronomy

Lomonosov Moscow State University

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

17 Scopus citations

Abstract

Simple and reliable relaxation-oscillation-driven dc SQUIDs have been fabricated with flux-to-voltage transfer factor H =∣ δV/ δϕe∣ up to 1 mV/ϕ0 and internal energy sensitivity Ev = (4 ± 1)x10-31 J/Hz at frequencies above about 10 Hz, and 1x10-29(1 Hz/f) J/Hz at lower frequencies. Supplied with the 50-μm-wire 20-turn spiral input Coil and 6 cm2 pick-up loop, such SQUIDs provided magnetic field sensitivity close to (6 ± 3)x10-15 T/Hz1/2 above 10 Hz. The dynamic range of the magnetometers was close to 1.5x107 Hz1/2 and the maximum slew rate, about 10 µT/s at 0.1 kHz. Successful records of the Earth-ionosphere magnetic resonances have been obtained with these magnetometers housed in a stainless steel transport dewar. A new balanced version of the RO-driven dc SQUID has been suggested with the aim to improve both H and Ev. An analysis and the first measurements have shown a noticeable increase of H with respect to the basic version of the device.

Original language	English
Pages (from-to)	1178-1181
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	25
Issue number	2
DOIs	https://doi.org/10.1109/20.92500
State	Published - Mar 1989

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@article{688e212ce83f4aea8995991aad9d3595,

title = "Relaxation-oscillation-driven DC squids",

abstract = "Simple and reliable relaxation-oscillation-driven dc SQUIDs have been fabricated with flux-to-voltage transfer factor H =∣ δV/ δϕe∣ up to 1 mV/ϕ0 and internal energy sensitivity Ev = (4 ± 1)x10-31 J/Hz at frequencies above about 10 Hz, and 1x10-29(1 Hz/f) J/Hz at lower frequencies. Supplied with the 50-μm-wire 20-turn spiral input Coil and 6 cm2 pick-up loop, such SQUIDs provided magnetic field sensitivity close to (6 ± 3)x10-15 T/Hz1/2 above 10 Hz. The dynamic range of the magnetometers was close to 1.5x107 Hz1/2 and the maximum slew rate, about 10 µT/s at 0.1 kHz. Successful records of the Earth-ionosphere magnetic resonances have been obtained with these magnetometers housed in a stainless steel transport dewar. A new balanced version of the RO-driven dc SQUID has been suggested with the aim to improve both H and Ev. An analysis and the first measurements have shown a noticeable increase of H with respect to the basic version of the device.",

author = "Gudoshnikov, \{S. A.\} and Maslennikov, \{Yu V.\} and Semenov, \{V. K.\} and Snigirev, \{O. V.\} and Vasiliev, \{A. V.\}",

year = "1989",

month = mar,

doi = "10.1109/20.92500",

language = "English",

volume = "25",

pages = "1178--1181",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

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T1 - Relaxation-oscillation-driven DC squids

AU - Gudoshnikov, S. A.

AU - Maslennikov, Yu V.

AU - Semenov, V. K.

AU - Snigirev, O. V.

AU - Vasiliev, A. V.

PY - 1989/3

Y1 - 1989/3

N2 - Simple and reliable relaxation-oscillation-driven dc SQUIDs have been fabricated with flux-to-voltage transfer factor H =∣ δV/ δϕe∣ up to 1 mV/ϕ0 and internal energy sensitivity Ev = (4 ± 1)x10-31 J/Hz at frequencies above about 10 Hz, and 1x10-29(1 Hz/f) J/Hz at lower frequencies. Supplied with the 50-μm-wire 20-turn spiral input Coil and 6 cm2 pick-up loop, such SQUIDs provided magnetic field sensitivity close to (6 ± 3)x10-15 T/Hz1/2 above 10 Hz. The dynamic range of the magnetometers was close to 1.5x107 Hz1/2 and the maximum slew rate, about 10 µT/s at 0.1 kHz. Successful records of the Earth-ionosphere magnetic resonances have been obtained with these magnetometers housed in a stainless steel transport dewar. A new balanced version of the RO-driven dc SQUID has been suggested with the aim to improve both H and Ev. An analysis and the first measurements have shown a noticeable increase of H with respect to the basic version of the device.

AB - Simple and reliable relaxation-oscillation-driven dc SQUIDs have been fabricated with flux-to-voltage transfer factor H =∣ δV/ δϕe∣ up to 1 mV/ϕ0 and internal energy sensitivity Ev = (4 ± 1)x10-31 J/Hz at frequencies above about 10 Hz, and 1x10-29(1 Hz/f) J/Hz at lower frequencies. Supplied with the 50-μm-wire 20-turn spiral input Coil and 6 cm2 pick-up loop, such SQUIDs provided magnetic field sensitivity close to (6 ± 3)x10-15 T/Hz1/2 above 10 Hz. The dynamic range of the magnetometers was close to 1.5x107 Hz1/2 and the maximum slew rate, about 10 µT/s at 0.1 kHz. Successful records of the Earth-ionosphere magnetic resonances have been obtained with these magnetometers housed in a stainless steel transport dewar. A new balanced version of the RO-driven dc SQUID has been suggested with the aim to improve both H and Ev. An analysis and the first measurements have shown a noticeable increase of H with respect to the basic version of the device.

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DO - 10.1109/20.92500

M3 - Article

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SN - 0018-9464

VL - 25

SP - 1178

EP - 1181

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 2

ER -

Relaxation-oscillation-driven DC squids

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