Multichannel SQUID magnetometry using double relaxation oscillation SQUID's
A highly sensitive first-order gradiometer based on double relaxation oscillation SQUID's (DROS's) for multichannel use is presented. The white flux noise level of the bare DROS's is 4.5 /spl mu//spl Phi//sub 0///spl radic/Hz (/spl epsi/=275 h). With wire-wound first-order gradiometer...
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| Veröffentlicht in: | IEEE transactions on applied superconductivity 1996-03, Vol.6 (1), p.38-44 |
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| container_title | IEEE transactions on applied superconductivity |
| container_volume | 6 |
| creator | van Duuren, M.J. Lee, Y.H. Adelerhof, D.J. Kawai, J. Kado, H. Flokstra, J. Rogalla, H. |
| description | A highly sensitive first-order gradiometer based on double relaxation oscillation SQUID's (DROS's) for multichannel use is presented. The white flux noise level of the bare DROS's is 4.5 /spl mu//spl Phi//sub 0///spl radic/Hz (/spl epsi/=275 h). With wire-wound first-order gradiometers, having a baseline of 40 mm, the white magnetic field noise equals 4 fT//spl radic/Hz. As a result of the high flux-to-voltage transfer of the DROS's of about 1 mV//spl Phi//sub 0/, this low noise level could be obtained with simple room-temperature flux locked loop electronics based on direct voltage readout. The relaxation frequency of the present DROS's is approximately 1 GHz. No degradation of the DROS characteristics caused by interference between relaxation oscillations in two adjacent channels has been observed, although the gradiometers are spaced by less than 1 mm. This shows that DROS's can be used in multichannel SQUID magnetometers. |
| doi_str_mv | 10.1109/77.488279 |
| format | Article |
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The white flux noise level of the bare DROS's is 4.5 /spl mu//spl Phi//sub 0///spl radic/Hz (/spl epsi/=275 h). With wire-wound first-order gradiometers, having a baseline of 40 mm, the white magnetic field noise equals 4 fT//spl radic/Hz. As a result of the high flux-to-voltage transfer of the DROS's of about 1 mV//spl Phi//sub 0/, this low noise level could be obtained with simple room-temperature flux locked loop electronics based on direct voltage readout. The relaxation frequency of the present DROS's is approximately 1 GHz. No degradation of the DROS characteristics caused by interference between relaxation oscillations in two adjacent channels has been observed, although the gradiometers are spaced by less than 1 mm. This shows that DROS's can be used in multichannel SQUID magnetometers.</description><identifier>ISSN: 1051-8223</identifier><identifier>EISSN: 1558-2515</identifier><identifier>DOI: 10.1109/77.488279</identifier><identifier>CODEN: ITASE9</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Degradation ; Exact sciences and technology ; Frequency ; Instruments, apparatus, components and techniques common to several branches of physics and astronomy ; Interference ; Magnetic components, instruments and techniques ; Magnetic fields ; Magnetic flux ; Magnetic noise ; Magnetometers for magnetic field measurements ; Noise level ; Physics ; SQUIDs ; Voltage ; White noise</subject><ispartof>IEEE transactions on applied superconductivity, 1996-03, Vol.6 (1), p.38-44</ispartof><rights>1996 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-cd1eda8dd90128803a87c6b6b1b1a277d1c0c99be4a03078dded27f838e4e4b93</citedby><cites>FETCH-LOGICAL-c372t-cd1eda8dd90128803a87c6b6b1b1a277d1c0c99be4a03078dded27f838e4e4b93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/488279$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/488279$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3077174$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>van Duuren, M.J.</creatorcontrib><creatorcontrib>Lee, Y.H.</creatorcontrib><creatorcontrib>Adelerhof, D.J.</creatorcontrib><creatorcontrib>Kawai, J.</creatorcontrib><creatorcontrib>Kado, H.</creatorcontrib><creatorcontrib>Flokstra, J.</creatorcontrib><creatorcontrib>Rogalla, H.</creatorcontrib><title>Multichannel SQUID magnetometry using double relaxation oscillation SQUID's</title><title>IEEE transactions on applied superconductivity</title><addtitle>TASC</addtitle><description>A highly sensitive first-order gradiometer based on double relaxation oscillation SQUID's (DROS's) for multichannel use is presented. The white flux noise level of the bare DROS's is 4.5 /spl mu//spl Phi//sub 0///spl radic/Hz (/spl epsi/=275 h). With wire-wound first-order gradiometers, having a baseline of 40 mm, the white magnetic field noise equals 4 fT//spl radic/Hz. As a result of the high flux-to-voltage transfer of the DROS's of about 1 mV//spl Phi//sub 0/, this low noise level could be obtained with simple room-temperature flux locked loop electronics based on direct voltage readout. The relaxation frequency of the present DROS's is approximately 1 GHz. No degradation of the DROS characteristics caused by interference between relaxation oscillations in two adjacent channels has been observed, although the gradiometers are spaced by less than 1 mm. This shows that DROS's can be used in multichannel SQUID magnetometers.</description><subject>Degradation</subject><subject>Exact sciences and technology</subject><subject>Frequency</subject><subject>Instruments, apparatus, components and techniques common to several branches of physics and astronomy</subject><subject>Interference</subject><subject>Magnetic components, instruments and techniques</subject><subject>Magnetic fields</subject><subject>Magnetic flux</subject><subject>Magnetic noise</subject><subject>Magnetometers for magnetic field measurements</subject><subject>Noise level</subject><subject>Physics</subject><subject>SQUIDs</subject><subject>Voltage</subject><subject>White noise</subject><issn>1051-8223</issn><issn>1558-2515</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNqFkL1PwzAUxC0EEqUwsDJlQCCGFD8njp0RtXxUFCEEnSPHeSlGTlLsRKL_PSmpujK9k97vTqcj5BzoBICmt0JMYimZSA_ICDiXIePAD3tNOYSSseiYnHj_RSnEMuYj8vzS2dboT1XXaIP3t-V8FlRqVWPbVNi6TdB5U6-Coulyi4FDq35Ua5o6aLw21g76z3btT8lRqazHs90dk-XD_cf0KVy8Ps6nd4tQR4K1oS4ACyWLIqXApKSRkkIneZJDDooJUYCmOk1zjBWNqOhBLJgoZSQxxjhPozG5GnLXrvnu0LdZZbzGvk2NTeczJqOk9_H_wQRSzpIteDOA2jXeOyyztTOVcpsMaLbdNRMiG3bt2ctdqPJa2dKpWhu_N_SNBYi4xy4GzCDi_rvL-AV9gH9f</recordid><startdate>19960301</startdate><enddate>19960301</enddate><creator>van Duuren, M.J.</creator><creator>Lee, Y.H.</creator><creator>Adelerhof, D.J.</creator><creator>Kawai, J.</creator><creator>Kado, H.</creator><creator>Flokstra, J.</creator><creator>Rogalla, H.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>19960301</creationdate><title>Multichannel SQUID magnetometry using double relaxation oscillation SQUID's</title><author>van Duuren, M.J. ; Lee, Y.H. ; Adelerhof, D.J. ; Kawai, J. ; Kado, H. ; Flokstra, J. ; Rogalla, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c372t-cd1eda8dd90128803a87c6b6b1b1a277d1c0c99be4a03078dded27f838e4e4b93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Degradation</topic><topic>Exact sciences and technology</topic><topic>Frequency</topic><topic>Instruments, apparatus, components and techniques common to several branches of physics and astronomy</topic><topic>Interference</topic><topic>Magnetic components, instruments and techniques</topic><topic>Magnetic fields</topic><topic>Magnetic flux</topic><topic>Magnetic noise</topic><topic>Magnetometers for magnetic field measurements</topic><topic>Noise level</topic><topic>Physics</topic><topic>SQUIDs</topic><topic>Voltage</topic><topic>White noise</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>van Duuren, M.J.</creatorcontrib><creatorcontrib>Lee, Y.H.</creatorcontrib><creatorcontrib>Adelerhof, D.J.</creatorcontrib><creatorcontrib>Kawai, J.</creatorcontrib><creatorcontrib>Kado, H.</creatorcontrib><creatorcontrib>Flokstra, J.</creatorcontrib><creatorcontrib>Rogalla, H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on applied superconductivity</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>van Duuren, M.J.</au><au>Lee, Y.H.</au><au>Adelerhof, D.J.</au><au>Kawai, J.</au><au>Kado, H.</au><au>Flokstra, J.</au><au>Rogalla, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multichannel SQUID magnetometry using double relaxation oscillation SQUID's</atitle><jtitle>IEEE transactions on applied superconductivity</jtitle><stitle>TASC</stitle><date>1996-03-01</date><risdate>1996</risdate><volume>6</volume><issue>1</issue><spage>38</spage><epage>44</epage><pages>38-44</pages><issn>1051-8223</issn><eissn>1558-2515</eissn><coden>ITASE9</coden><abstract>A highly sensitive first-order gradiometer based on double relaxation oscillation SQUID's (DROS's) for multichannel use is presented. The white flux noise level of the bare DROS's is 4.5 /spl mu//spl Phi//sub 0///spl radic/Hz (/spl epsi/=275 h). With wire-wound first-order gradiometers, having a baseline of 40 mm, the white magnetic field noise equals 4 fT//spl radic/Hz. As a result of the high flux-to-voltage transfer of the DROS's of about 1 mV//spl Phi//sub 0/, this low noise level could be obtained with simple room-temperature flux locked loop electronics based on direct voltage readout. The relaxation frequency of the present DROS's is approximately 1 GHz. No degradation of the DROS characteristics caused by interference between relaxation oscillations in two adjacent channels has been observed, although the gradiometers are spaced by less than 1 mm. This shows that DROS's can be used in multichannel SQUID magnetometers.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/77.488279</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Degradation Exact sciences and technology Frequency Instruments, apparatus, components and techniques common to several branches of physics and astronomy Interference Magnetic components, instruments and techniques Magnetic fields Magnetic flux Magnetic noise Magnetometers for magnetic field measurements Noise level Physics SQUIDs Voltage White noise |
| title | Multichannel SQUID magnetometry using double relaxation oscillation SQUID's |
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