DC SQUIDs with planar input coils

C. Pegrum; D. Hutson; G. Donaldson; A. Tugwell

doi:10.1109/TMAG.1985.1063691

DC SQUIDs with planar input coils

C. Pegrum, D. Hutson, G. Donaldson, A. Tugwell

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

11 Citations (Scopus)

Abstract

We describe the key parts of our recent work to develop a planar thin-film DC SQUID with a closely-coupled spiral input coil. Our aim has been to make a device that is superior to present RF SQUID sensors in terms of sensitivity and long-term reliability. To be compatible with an RF SQUID the inductance of the input coils must be relatively large, typically 2 μH, and the input noise current in the white noise region should be below 10pA Hz^-1/2. A low level of 1/f noise is also necessary for many applications and should be achieved without the use of complex noise-cancelling circuitry. Our devices meet these criteria. We include a description of work on window and edge junction fabrication using ion beam cleaning, thermal oxidation and RF plasma processing.

Original language	English
Pages (from-to)	1036-1039
Journal	IEEE Transactions on Magnetics
Volume	21
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.1985.1063691
Publication status	Published - 1985
Externally published	Yes

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10.1109/TMAG.1985.1063691

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title = "DC SQUIDs with planar input coils",

abstract = "We describe the key parts of our recent work to develop a planar thin-film DC SQUID with a closely-coupled spiral input coil. Our aim has been to make a device that is superior to present RF SQUID sensors in terms of sensitivity and long-term reliability. To be compatible with an RF SQUID the inductance of the input coils must be relatively large, typically 2 μH, and the input noise current in the white noise region should be below 10pA Hz-1/2. A low level of 1/f noise is also necessary for many applications and should be achieved without the use of complex noise-cancelling circuitry. Our devices meet these criteria. We include a description of work on window and edge junction fabrication using ion beam cleaning, thermal oxidation and RF plasma processing.",

author = "C. Pegrum and D. Hutson and G. Donaldson and A. Tugwell",

year = "1985",

doi = "10.1109/TMAG.1985.1063691",

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T1 - DC SQUIDs with planar input coils

AU - Pegrum, C.

AU - Hutson, D.

AU - Donaldson, G.

AU - Tugwell, A.

PY - 1985

Y1 - 1985

N2 - We describe the key parts of our recent work to develop a planar thin-film DC SQUID with a closely-coupled spiral input coil. Our aim has been to make a device that is superior to present RF SQUID sensors in terms of sensitivity and long-term reliability. To be compatible with an RF SQUID the inductance of the input coils must be relatively large, typically 2 μH, and the input noise current in the white noise region should be below 10pA Hz-1/2. A low level of 1/f noise is also necessary for many applications and should be achieved without the use of complex noise-cancelling circuitry. Our devices meet these criteria. We include a description of work on window and edge junction fabrication using ion beam cleaning, thermal oxidation and RF plasma processing.

AB - We describe the key parts of our recent work to develop a planar thin-film DC SQUID with a closely-coupled spiral input coil. Our aim has been to make a device that is superior to present RF SQUID sensors in terms of sensitivity and long-term reliability. To be compatible with an RF SQUID the inductance of the input coils must be relatively large, typically 2 μH, and the input noise current in the white noise region should be below 10pA Hz-1/2. A low level of 1/f noise is also necessary for many applications and should be achieved without the use of complex noise-cancelling circuitry. Our devices meet these criteria. We include a description of work on window and edge junction fabrication using ion beam cleaning, thermal oxidation and RF plasma processing.

U2 - 10.1109/TMAG.1985.1063691

DO - 10.1109/TMAG.1985.1063691

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VL - 21

SP - 1036

EP - 1039

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 2

ER -

DC SQUIDs with planar input coils

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