Evaluation of Magnetic Field Distribution by Screening Current in Multiple REBCO Coils
Coil systems are fabricated with various combinations of multiple coils in order to generate homogenous fields for NMR and MRI applications. In multiple coil systems using REBCO coils, the behavior of the screening current, which deteriorates field homogeneity, depends on the patterns of the transpo...
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| Veröffentlicht in: | IEEE transactions on applied superconductivity 2016-06, Vol.26 (4), p.1-5 |
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| creator | Mochida, Ayumu Ueda, Hiroshi Noguchi, So Tao Wang Ishiyama, Atsushi Miyazaki, Hiroshi Tosaka, Taizo Nomura, Shunji Kurusu, Tsutomu Urayama, Shinichi Fukuyama, Hidenao |
| description | Coil systems are fabricated with various combinations of multiple coils in order to generate homogenous fields for NMR and MRI applications. In multiple coil systems using REBCO coils, the behavior of the screening current, which deteriorates field homogeneity, depends on the patterns of the transport current, the charging sequence of the coils, and the various resulting magnetic fields. It is therefore important to investigate and clarify the behavior of the irregular magnetic field and screening current in multiple coil systems under different operating environments. In a previous study, we experimentally and numerically clarified the different behaviors of irregular magnetic fields based on the charging sequence of coils in multiple-model REBCO coils [1], [2]. In this paper, we constructed the multiple-model REBCO coils in order to obtain the fundamental data for reducing or improving the resulting irregular magnetic field. Furthermore, the distribution of the irregular magnetic field in terms of the screening current was measured by using the reversal current method [3], [4]. We also calculated the spatial and temporal behavior of the irregular magnetic field by using our developed 3-D numerical simulation. Based on the experimental and numerical results, we discuss the behavior of the magnetic field in terms of the screening current when using the current sweep reversal method in multiple-model REBCO coils. |
| doi_str_mv | 10.1109/TASC.2016.2542980 |
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In multiple coil systems using REBCO coils, the behavior of the screening current, which deteriorates field homogeneity, depends on the patterns of the transport current, the charging sequence of the coils, and the various resulting magnetic fields. It is therefore important to investigate and clarify the behavior of the irregular magnetic field and screening current in multiple coil systems under different operating environments. In a previous study, we experimentally and numerically clarified the different behaviors of irregular magnetic fields based on the charging sequence of coils in multiple-model REBCO coils [1], [2]. In this paper, we constructed the multiple-model REBCO coils in order to obtain the fundamental data for reducing or improving the resulting irregular magnetic field. Furthermore, the distribution of the irregular magnetic field in terms of the screening current was measured by using the reversal current method [3], [4]. We also calculated the spatial and temporal behavior of the irregular magnetic field by using our developed 3-D numerical simulation. Based on the experimental and numerical results, we discuss the behavior of the magnetic field in terms of the screening current when using the current sweep reversal method in multiple-model REBCO coils.</description><identifier>ISSN: 1051-8223</identifier><identifier>EISSN: 1558-2515</identifier><identifier>DOI: 10.1109/TASC.2016.2542980</identifier><identifier>CODEN: ITASE9</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Behavior ; Charging ; Coils ; Current measurement ; Deterioration ; Homogeneity ; HTS ; magnetic field distribution ; Magnetic field measurement ; Magnetic fields ; Magnetic resonance imaging ; Mathematical models ; multiple coils ; Numerical models ; Numerical simulation ; REBCO ; Screening ; screening current ; Superconductivity</subject><ispartof>IEEE transactions on applied superconductivity, 2016-06, Vol.26 (4), p.1-5</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c392t-4e755e35ec9a6b779af4dd7958e232f6b655d3de46aee50a24c46cbd765b702e3</citedby><cites>FETCH-LOGICAL-c392t-4e755e35ec9a6b779af4dd7958e232f6b655d3de46aee50a24c46cbd765b702e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/7434601$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/7434601$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Mochida, Ayumu</creatorcontrib><creatorcontrib>Ueda, Hiroshi</creatorcontrib><creatorcontrib>Noguchi, So</creatorcontrib><creatorcontrib>Tao Wang</creatorcontrib><creatorcontrib>Ishiyama, Atsushi</creatorcontrib><creatorcontrib>Miyazaki, Hiroshi</creatorcontrib><creatorcontrib>Tosaka, Taizo</creatorcontrib><creatorcontrib>Nomura, Shunji</creatorcontrib><creatorcontrib>Kurusu, Tsutomu</creatorcontrib><creatorcontrib>Urayama, Shinichi</creatorcontrib><creatorcontrib>Fukuyama, Hidenao</creatorcontrib><title>Evaluation of Magnetic Field Distribution by Screening Current in Multiple REBCO Coils</title><title>IEEE transactions on applied superconductivity</title><addtitle>TASC</addtitle><description>Coil systems are fabricated with various combinations of multiple coils in order to generate homogenous fields for NMR and MRI applications. In multiple coil systems using REBCO coils, the behavior of the screening current, which deteriorates field homogeneity, depends on the patterns of the transport current, the charging sequence of the coils, and the various resulting magnetic fields. It is therefore important to investigate and clarify the behavior of the irregular magnetic field and screening current in multiple coil systems under different operating environments. In a previous study, we experimentally and numerically clarified the different behaviors of irregular magnetic fields based on the charging sequence of coils in multiple-model REBCO coils [1], [2]. In this paper, we constructed the multiple-model REBCO coils in order to obtain the fundamental data for reducing or improving the resulting irregular magnetic field. Furthermore, the distribution of the irregular magnetic field in terms of the screening current was measured by using the reversal current method [3], [4]. We also calculated the spatial and temporal behavior of the irregular magnetic field by using our developed 3-D numerical simulation. Based on the experimental and numerical results, we discuss the behavior of the magnetic field in terms of the screening current when using the current sweep reversal method in multiple-model REBCO coils.</description><subject>Behavior</subject><subject>Charging</subject><subject>Coils</subject><subject>Current measurement</subject><subject>Deterioration</subject><subject>Homogeneity</subject><subject>HTS</subject><subject>magnetic field distribution</subject><subject>Magnetic field measurement</subject><subject>Magnetic fields</subject><subject>Magnetic resonance imaging</subject><subject>Mathematical models</subject><subject>multiple coils</subject><subject>Numerical models</subject><subject>Numerical simulation</subject><subject>REBCO</subject><subject>Screening</subject><subject>screening current</subject><subject>Superconductivity</subject><issn>1051-8223</issn><issn>1558-2515</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkE1Lw0AQhoMoWKs_QLwsePGSut_JHmtsVWgp2Op12SSTsiXd1N1E6L83tcWDp3lhnncYnii6JXhECFaPq_EyG1FM5IgKTlWKz6IBESKNqSDivM9YkDillF1GVyFsMCY85WIQfU6-Td2Z1jYONRWam7WD1hZoaqEu0bMNrbd597vO92hZeABn3RplnffgWmQdmnd1a3c1oPfJU7ZAWWPrcB1dVKYOcHOaw-hjOlllr_Fs8fKWjWdxwRRtYw6JEMAEFMrIPEmUqXhZJkqkQBmtZC6FKFkJXBoAgQ3lBZdFXiZS5AmmwIbRw_HuzjdfHYRWb20ooK6Ng6YLmqS9jlQplvbo_T9003Te9d9pkigquVTyQJEjVfgmBA-V3nm7NX6vCdYH0_pgWh9M65PpvnN37FgA-OMTzrjEhP0AQfJ5DQ</recordid><startdate>20160601</startdate><enddate>20160601</enddate><creator>Mochida, Ayumu</creator><creator>Ueda, Hiroshi</creator><creator>Noguchi, So</creator><creator>Tao Wang</creator><creator>Ishiyama, Atsushi</creator><creator>Miyazaki, Hiroshi</creator><creator>Tosaka, Taizo</creator><creator>Nomura, Shunji</creator><creator>Kurusu, Tsutomu</creator><creator>Urayama, Shinichi</creator><creator>Fukuyama, Hidenao</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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In multiple coil systems using REBCO coils, the behavior of the screening current, which deteriorates field homogeneity, depends on the patterns of the transport current, the charging sequence of the coils, and the various resulting magnetic fields. It is therefore important to investigate and clarify the behavior of the irregular magnetic field and screening current in multiple coil systems under different operating environments. In a previous study, we experimentally and numerically clarified the different behaviors of irregular magnetic fields based on the charging sequence of coils in multiple-model REBCO coils [1], [2]. In this paper, we constructed the multiple-model REBCO coils in order to obtain the fundamental data for reducing or improving the resulting irregular magnetic field. Furthermore, the distribution of the irregular magnetic field in terms of the screening current was measured by using the reversal current method [3], [4]. We also calculated the spatial and temporal behavior of the irregular magnetic field by using our developed 3-D numerical simulation. Based on the experimental and numerical results, we discuss the behavior of the magnetic field in terms of the screening current when using the current sweep reversal method in multiple-model REBCO coils.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TASC.2016.2542980</doi><tpages>5</tpages></addata></record> |
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| subjects | Behavior Charging Coils Current measurement Deterioration Homogeneity HTS magnetic field distribution Magnetic field measurement Magnetic fields Magnetic resonance imaging Mathematical models multiple coils Numerical models Numerical simulation REBCO Screening screening current Superconductivity |
| title | Evaluation of Magnetic Field Distribution by Screening Current in Multiple REBCO Coils |
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