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Stabilization and optimization of a two-stage dc SQUID coupled to a high Q resonator

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Title: Stabilization and optimization of a two-stage dc SQUID coupled to a high Q resonator
Authors: Vinante, Andrea1 vinante@science.unitn.it, Bonaldi, Michele2, Falferi, Paolo2, Cerdonio, Massimo3, Mezzena, Renato1, Prodi, Giovanni Andrea1, Vitale, Stefano1
Source: Physica C. Mar2002, Vol. 368 Issue 1-4, p176. 5p.
Subjects: Superconducting quantum interference devices, Resonators, Gravity waves, Detectors
Abstract: A two-stage dc SQUID is strongly coupled to an electrical resonator at 1.6 kHz with quality factor Q=1.1×106 in order to simulate the behaviour of the SQUID on a resonant gravitational wave detector. A capacitive damping network is successfully employed in order to avoid the instabilities due to the real part of the SQUID dynamic input impedance. The coupled energy resolution is 300 ℎ at 4.2 K, scales with temperature, and is not significantly worsened by the coupling to the resonator and by the damping network. [Copyright &y& Elsevier]
Copyright of Physica C is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 7753948
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="AR" term="%22Vinante%2C+Andrea%22">Vinante, Andrea</searchLink><relatesTo>1</relatesTo><i> vinante@science.unitn.it</i><br /><searchLink fieldCode="AR" term="%22Bonaldi%2C+Michele%22">Bonaldi, Michele</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Falferi%2C+Paolo%22">Falferi, Paolo</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Cerdonio%2C+Massimo%22">Cerdonio, Massimo</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Mezzena%2C+Renato%22">Mezzena, Renato</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Prodi%2C+Giovanni+Andrea%22">Prodi, Giovanni Andrea</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Vitale%2C+Stefano%22">Vitale, Stefano</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Physica+C%22">Physica C</searchLink>. Mar2002, Vol. 368 Issue 1-4, p176. 5p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Superconducting+quantum+interference+devices%22">Superconducting quantum interference devices</searchLink><br /><searchLink fieldCode="DE" term="%22Resonators%22">Resonators</searchLink><br /><searchLink fieldCode="DE" term="%22Gravity+waves%22">Gravity waves</searchLink><br /><searchLink fieldCode="DE" term="%22Detectors%22">Detectors</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: A two-stage dc SQUID is strongly coupled to an electrical resonator at 1.6 kHz with quality factor <f>Q=1.1×106</f> in order to simulate the behaviour of the SQUID on a resonant gravitational wave detector. A capacitive damping network is successfully employed in order to avoid the instabilities due to the real part of the SQUID dynamic input impedance. The coupled energy resolution is 300 <f>ℎ</f> at 4.2 K, scales with temperature, and is not significantly worsened by the coupling to the resonator and by the damping network. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Physica C is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/S0921-4534(01)01162-5
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      – Code: eng
        Text: English
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      – SubjectFull: Resonators
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      – SubjectFull: Gravity waves
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              Text: Mar2002
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