Precision current regulator for NMR electromagnets
[Display omitted] •Improves current regulation for superior field stability.•X50 improvement in field stability.•Uses dc-dc current transformer (fluxgate) device.•Inexpensive.•Can be applied to essentially any current source. When using electromagnets or non-persistent superconducting magnets, the f...
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| Veröffentlicht in: | Journal of magnetic resonance (1997) 2020-11, Vol.320 (C), p.106830-106830, Article 106830 |
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| container_end_page | 106830 |
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| container_issue | C |
| container_start_page | 106830 |
| container_title | Journal of magnetic resonance (1997) |
| container_volume | 320 |
| creator | Conradi, Mark S. Fabich, Hilary T. |
| description | [Display omitted]
•Improves current regulation for superior field stability.•X50 improvement in field stability.•Uses dc-dc current transformer (fluxgate) device.•Inexpensive.•Can be applied to essentially any current source.
When using electromagnets or non-persistent superconducting magnets, the field stability can be directly proportional to the current stability. We present here a simple design for a current regulator based upon a high-precision, dc-dc fluxgate transformer. The output current and NMR frequency are stabilized by about a factor of 50, over times of order one hour. The method can be applied to essentially any current supply. |
| doi_str_mv | 10.1016/j.jmr.2020.106830 |
| format | Article |
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•Improves current regulation for superior field stability.•X50 improvement in field stability.•Uses dc-dc current transformer (fluxgate) device.•Inexpensive.•Can be applied to essentially any current source.
When using electromagnets or non-persistent superconducting magnets, the field stability can be directly proportional to the current stability. We present here a simple design for a current regulator based upon a high-precision, dc-dc fluxgate transformer. The output current and NMR frequency are stabilized by about a factor of 50, over times of order one hour. The method can be applied to essentially any current supply.</description><identifier>ISSN: 1090-7807</identifier><identifier>EISSN: 1096-0856</identifier><identifier>DOI: 10.1016/j.jmr.2020.106830</identifier><language>eng</language><publisher>Netherlands: Elsevier Inc</publisher><subject>Current regulation ; Current stability ; Dc-dc transformer ; Field regulation ; Field stability ; Fluxgate</subject><ispartof>Journal of magnetic resonance (1997), 2020-11, Vol.320 (C), p.106830-106830, Article 106830</ispartof><rights>2020 Elsevier Inc.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c352t-3cbd6428f8a826d13deaae5eb82ea0e520d4bf31512c80082872fd6f6961bfd33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jmr.2020.106830$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1809599$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Conradi, Mark S.</creatorcontrib><creatorcontrib>Fabich, Hilary T.</creatorcontrib><title>Precision current regulator for NMR electromagnets</title><title>Journal of magnetic resonance (1997)</title><description>[Display omitted]
•Improves current regulation for superior field stability.•X50 improvement in field stability.•Uses dc-dc current transformer (fluxgate) device.•Inexpensive.•Can be applied to essentially any current source.
When using electromagnets or non-persistent superconducting magnets, the field stability can be directly proportional to the current stability. We present here a simple design for a current regulator based upon a high-precision, dc-dc fluxgate transformer. The output current and NMR frequency are stabilized by about a factor of 50, over times of order one hour. The method can be applied to essentially any current supply.</description><subject>Current regulation</subject><subject>Current stability</subject><subject>Dc-dc transformer</subject><subject>Field regulation</subject><subject>Field stability</subject><subject>Fluxgate</subject><issn>1090-7807</issn><issn>1096-0856</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK7-AG_Fk5euk7RNUzzJ4hf4heg5pOlkzdI2a5IK_ntb69nDMDPwvMM7LyGnFFYUKL_YrradXzFg085FBntkQaHiKYiC7__OkJYCykNyFMIWgNKihAVhLx61Ddb1iR68xz4mHjdDq6LziRnr6fE1wRZ19K5Tmx5jOCYHRrUBT_76krzfXL-t79KH59v79dVDqrOCxTTTdcNzJoxQgvGGZg0qhQXWgqECLBg0eW0yWlCmBYBgomSm4YZXnNamybIlOZvvuhCtDNpG1B_a9f1oRlIBVVFVI3Q-QzvvPgcMUXY2aGxb1aMbgmR5XlUVo7wYUTqj2rsQPBq587ZT_ltSkFOIcivHEOUUopxDHDWXswbHR78s-skH9hob6ycbjbP_qH8AViJ44g</recordid><startdate>202011</startdate><enddate>202011</enddate><creator>Conradi, Mark S.</creator><creator>Fabich, Hilary T.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>202011</creationdate><title>Precision current regulator for NMR electromagnets</title><author>Conradi, Mark S. ; Fabich, Hilary T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c352t-3cbd6428f8a826d13deaae5eb82ea0e520d4bf31512c80082872fd6f6961bfd33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Current regulation</topic><topic>Current stability</topic><topic>Dc-dc transformer</topic><topic>Field regulation</topic><topic>Field stability</topic><topic>Fluxgate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Conradi, Mark S.</creatorcontrib><creatorcontrib>Fabich, Hilary T.</creatorcontrib><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Journal of magnetic resonance (1997)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Conradi, Mark S.</au><au>Fabich, Hilary T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Precision current regulator for NMR electromagnets</atitle><jtitle>Journal of magnetic resonance (1997)</jtitle><date>2020-11</date><risdate>2020</risdate><volume>320</volume><issue>C</issue><spage>106830</spage><epage>106830</epage><pages>106830-106830</pages><artnum>106830</artnum><issn>1090-7807</issn><eissn>1096-0856</eissn><abstract>[Display omitted]
•Improves current regulation for superior field stability.•X50 improvement in field stability.•Uses dc-dc current transformer (fluxgate) device.•Inexpensive.•Can be applied to essentially any current source.
When using electromagnets or non-persistent superconducting magnets, the field stability can be directly proportional to the current stability. We present here a simple design for a current regulator based upon a high-precision, dc-dc fluxgate transformer. The output current and NMR frequency are stabilized by about a factor of 50, over times of order one hour. The method can be applied to essentially any current supply.</abstract><cop>Netherlands</cop><pub>Elsevier Inc</pub><doi>10.1016/j.jmr.2020.106830</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of magnetic resonance (1997), 2020-11, Vol.320 (C), p.106830-106830, Article 106830 |
| issn | 1090-7807 1096-0856 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1809599 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Current regulation Current stability Dc-dc transformer Field regulation Field stability Fluxgate |
| title | Precision current regulator for NMR electromagnets |
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