Monofilament MgB₂ wires for MRI magnets
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2013
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/78185 |
| _version_ | 1811090891708825600 |
|---|---|
| author | Ling, Jiayin |
| author2 | Yukikazu Iwasa. |
| author_facet | Yukikazu Iwasa. Ling, Jiayin |
| author_sort | Ling, Jiayin |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012. |
| first_indexed | 2024-09-23T14:53:37Z |
| format | Thesis |
| id | mit-1721.1/78185 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T14:53:37Z |
| publishDate | 2013 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/781852019-04-11T00:05:31Z Monofilament MgB₂ wires for MRI magnets Monofilament MgB₂ wires for Magnetic Resonance Imaging magnets Ling, Jiayin Yukikazu Iwasa. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012. Cataloged from PDF version of thesis. Includes bibliographical references (p. 85-86). MRI magnets are useful medical devices in early detection and efficient treatment of disease or injury. Because of the significant better performance, MRI magnets are made of superconductors rather than made of copper. Nowadays, there are over 20,000 superconducting MRI magnets installed worldwide. Most of them are made of NbTi or Nb₃Sn, but they are usually very expensive to purchase or operate. So, my colleagues chose MgB₂ wires to develop low-cost and easy-to-operate MRI units which serve to the majority of the humanity. Because we have a reliable technology to fabricate superconducting joints with monofilament MgB₂ wire, we decided to build our MgB₂ MRI magnet with monofilament wire instead of multifilament wire. Previously, flux jumping was found to be the main issue with monofilament superconducting wire; we have to demonstrate that flux jumping is not a big issue with monofilament MgB₂ wire before we can build our MRI magnet with it. In this thesis, a series of experiments was designed and carried out to prove that the monofilament MgB₂ wire performs as well as the multifilament MgB₂ wire in MRI magnet applications. Short samples of monofilament MgB₂ wires were tested, and magnetization trace of the short samples showed that flux jumping could be a minor issue with monofilament MgB₂ wire. Three 100-m sample coils made of multifilament MgB₂ wire, monofilament MgB₂ wire, and monofilament NbTi wire were wound, tested and compared. The results of these tests demonstrated that the monofilament MgB₂ wire has insignificant flux jumping which does not lead to a premature quench. So, monofilament MgB₂ wire is potentially a good option for MRI magnets. by Jiayin Ling. S.M. 2013-03-28T18:12:20Z 2013-03-28T18:12:20Z 2012 2012 Thesis http://hdl.handle.net/1721.1/78185 829827543 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 86 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Ling, Jiayin Monofilament MgB₂ wires for MRI magnets |
| title | Monofilament MgB₂ wires for MRI magnets |
| title_full | Monofilament MgB₂ wires for MRI magnets |
| title_fullStr | Monofilament MgB₂ wires for MRI magnets |
| title_full_unstemmed | Monofilament MgB₂ wires for MRI magnets |
| title_short | Monofilament MgB₂ wires for MRI magnets |
| title_sort | monofilament mgb₂ wires for mri magnets |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/78185 |
| work_keys_str_mv | AT lingjiayin monofilamentmgb2wiresformrimagnets AT lingjiayin monofilamentmgb2wiresformagneticresonanceimagingmagnets |