Squid Fundamentals

Clarke, John

doi:10.1007/978-94-011-5674-5_1

Cited by 108 publications

(87 citation statements)

References 138 publications

(136 reference statements)

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“…[258]). While conventional Faraday detectors measure the changes in the oscillating magnetic flux ss a function of time (d@/dt), a SQUID measures the magnetic flux directly; independent of nuclear polarization, a SQUID's sensitivity does not (in principle) scale with frequency at low frequencies.…”

Section: Squid Detection Of Polarized Gasesmentioning

confidence: 99%

Nuclear magnetic resonance of laser-polarized noble gases in molecules, materials and organisms

Goodson

1999

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Section: Squid Detection Of Polarized Gasesmentioning

confidence: 99%

Nuclear magnetic resonance of laser-polarized noble gases in molecules, materials and organisms

Goodson

1999

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“…These technical advances have enabled atomic magnetometers to achieve sensitivities rivaling [8,9,10,11] and even surpassing [12] that of most Superconducting Quantum Interference Device (SQUID) based magnetometers that have dominated the field of sensitive magnetometers for a number of years [13]. Atomic magnetometers have the intrinsic advantage of not requiring cryogenic cooling, and offer a significant potential for miniaturization.…”

mentioning

confidence: 99%

Optical magnetometry

2007

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Some of the most sensitive methods of measuring magnetic fields utilize interactions of resonant light with atomic vapor. Recent developments in this vibrant field are improving magnetometers in many traditional areas such as measurement of geomagnetic anomalies and magnetic fields in space, and are opening the door to new ones, including, dynamical measurements of bio-magnetic fields, detection of nuclear magnetic resonance (NMR), magnetic-resonance imaging (MRI), inertialrotation sensing, magnetic microscopy with cold atoms, and tests of fundamental symmetries of Nature.

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“…The dominant source of noise in these devices is the Johnson noise from the resistive shunts across the Josephson junctions. This noise scales linearly with temperature, so the noise temperature of dc SQUIDs is expected to be proportional to their physical temperature until either the quantum limit (Ta = hu/kB In 2) [25] is reached or hot electron effects in the shunts become dominant.…”

Section: Squid Amplifiersmentioning

confidence: 99%