MgB₂ Coil Options for Fusion Poloidal Magnets
A hybrid solution is proposed for the IGNITOR research fusion machine by using of superconducting coils for some poloidal magnets, in association with high field copper magnets for the central solenoid and for the toroidal field coils. The choice to be made among the various superconductors is based...
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| Format: | Article |
| Language: | en_US |
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Institute of Electrical and Electronics Engineers
2012
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| Online Access: | http://hdl.handle.net/1721.1/71160 https://orcid.org/0000-0002-4920-8617 |
| _version_ | 1811080935353876480 |
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| author | Giunchi, Giovanni Coppi, Bruno |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Giunchi, Giovanni Coppi, Bruno |
| author_sort | Giunchi, Giovanni |
| collection | MIT |
| description | A hybrid solution is proposed for the IGNITOR research fusion machine by using of superconducting coils for some poloidal magnets, in association with high field copper magnets for the central solenoid and for the toroidal field coils. The choice to be made among the various superconductors is based on the materials performances in high magnetic field, on the mechanical strength of the conductors and on the cost of manufacturing large coils. In this study we analyze a coil based on MgB₂, a "medium temperature" superconducting material that we expect will avoid, in association with others high temperature superconductors, the use of liquid He in future machines. The external poloidal magnet, 5 m in diameter and subjected to a magnetic field of 5 T, represents a real test bench of the technical issues which should be addressed in the exploitation of the future fusion reactors. To fulfil the technical characteristics of the selected magnet we must optimize the fill factor of the superconducting MgB₂ wires, increasing the presently obtained 30% value. Accordingly, the effective current density in the superconducting wire should be of about 1500 A/mm[superscript 2] (@10 K, 5 T), a value which is compatible with the present best MgB₂ laboratory short wires, doped by C or SiC. |
| first_indexed | 2024-09-23T11:39:12Z |
| format | Article |
| id | mit-1721.1/71160 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:39:12Z |
| publishDate | 2012 |
| publisher | Institute of Electrical and Electronics Engineers |
| record_format | dspace |
| spelling | mit-1721.1/711602022-09-27T21:00:37Z MgB₂ Coil Options for Fusion Poloidal Magnets Giunchi, Giovanni Coppi, Bruno Massachusetts Institute of Technology. Department of Physics Coppi, Bruno Coppi, Bruno A hybrid solution is proposed for the IGNITOR research fusion machine by using of superconducting coils for some poloidal magnets, in association with high field copper magnets for the central solenoid and for the toroidal field coils. The choice to be made among the various superconductors is based on the materials performances in high magnetic field, on the mechanical strength of the conductors and on the cost of manufacturing large coils. In this study we analyze a coil based on MgB₂, a "medium temperature" superconducting material that we expect will avoid, in association with others high temperature superconductors, the use of liquid He in future machines. The external poloidal magnet, 5 m in diameter and subjected to a magnetic field of 5 T, represents a real test bench of the technical issues which should be addressed in the exploitation of the future fusion reactors. To fulfil the technical characteristics of the selected magnet we must optimize the fill factor of the superconducting MgB₂ wires, increasing the presently obtained 30% value. Accordingly, the effective current density in the superconducting wire should be of about 1500 A/mm[superscript 2] (@10 K, 5 T), a value which is compatible with the present best MgB₂ laboratory short wires, doped by C or SiC. 2012-06-14T20:31:52Z 2012-06-14T20:31:52Z 2010-06 2009-10 Article http://purl.org/eprint/type/JournalArticle 1051-8223 1558-2515 INSPEC Accession Number: 11323405 http://hdl.handle.net/1721.1/71160 Giunchi, Giovanni, and Bruno Coppi. “MgB₂ Coil Options for Fusion Poloidal Magnets.” IEEE Transactions on Applied Superconductivity 20.3 (2010): 1610–1613. Web. ©2010 IEEE. https://orcid.org/0000-0002-4920-8617 en_US http://dx.doi.org/10.1109/TASC.2010.2043664 IEEE Transactions on Applied Superconductivity Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Electrical and Electronics Engineers IEEE |
| spellingShingle | Giunchi, Giovanni Coppi, Bruno MgB₂ Coil Options for Fusion Poloidal Magnets |
| title | MgB₂ Coil Options for Fusion Poloidal Magnets |
| title_full | MgB₂ Coil Options for Fusion Poloidal Magnets |
| title_fullStr | MgB₂ Coil Options for Fusion Poloidal Magnets |
| title_full_unstemmed | MgB₂ Coil Options for Fusion Poloidal Magnets |
| title_short | MgB₂ Coil Options for Fusion Poloidal Magnets |
| title_sort | mgb₂ coil options for fusion poloidal magnets |
| url | http://hdl.handle.net/1721.1/71160 https://orcid.org/0000-0002-4920-8617 |
| work_keys_str_mv | AT giunchigiovanni mgb2coiloptionsforfusionpoloidalmagnets AT coppibruno mgb2coiloptionsforfusionpoloidalmagnets |