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MULTISCALE MULTIPHYSICS THERMO-MECHANICAL MODELING OF AN MGB2 BASED CONDUCTION COOLED MRI MAGNET SYSTEM

Amin, Abdullah Al
http://orcid.org/0000-0002-3245-5785
http://rave.ohiolink.edu/etdc/view?acc_num=case151385068164148

Abstract Details

2018, Doctor of Philosophy, Case Western Reserve University, EMC - Mechanical Engineering.
The past decade has experienced a surge in the price of liquid helium (LHe) affecting the cryogenic industry severely. As MRI machines are the most abundant consumer of LHe, disruption in the market growth is unavoidable if alternative technologies are unavailable. Replacement of current low-temperature superconductors such as Niobium-Titanium (NbTi) and Niobium-Tin (Nb3Sn) with an affordable high-temperature superconductor such as Magnesium diboride (MgB2) is a promising solution. However, strain sensitivity of the recently discovered superconductor MgB2 places a strict design limit on an MRI magnet. Since the manufacturing of the MRI magnet costs millions of dollars, a computational model is sought to analyze the feasibility of the novel conduction cooled MgB2 based full body MRI magnet. MRI magnet bundles (solenoids) consist of commercial grade superconductors which are a composite metal matrix. Thus computational modeling of MRI magnet systems spans across multiple scales and different physics fields. In this work, a complete multiphysics-multiscale approach to analyzing the feasibility of a next-generation conduction-cooled MRI magnet has demonstrated acceptable strain (<0.2%) and stress (<100 MPa) development, suggesting the practicality of such system. A complete non-linear finite element analysis (FEA) model for 1.5 T full body MRI magnet has been developed using ANSYS, and a prototype magnet bundle is under investigation for experimental tests at Ohio State University’s `Center for Superconducting and Magnetic Materials.' The experimental results are promising and assure this novel technology as a replacement to the current LHe cooled MRI magnets.
Michael Martens (Committee Chair)
Ozan Akkus (Committee Chair)
Bo Li (Committee Member)
Ya-Ting Tseng Liao (Committee Member)
Robert Brown (Committee Member)
271 p.
Mechanical Engineering; Physics
MgB2; Magnetic Resonance Imaging; MRI; Stress Strain of MRI; Multiscale modeling, Multiphysics, Strain modeling of MRI, MRI Magnet Quench, Superconducting Magnet, Metal Matrix Composite, Superconducting wire, Conduction Cooled MRI

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Citations

  • Amin, A. A. (2018). MULTISCALE MULTIPHYSICS THERMO-MECHANICAL MODELING OF AN MGB2 BASED CONDUCTION COOLED MRI MAGNET SYSTEM [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case151385068164148

    APA Style (7th edition)

  • Amin, Abdullah. MULTISCALE MULTIPHYSICS THERMO-MECHANICAL MODELING OF AN MGB2 BASED CONDUCTION COOLED MRI MAGNET SYSTEM. 2018. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case151385068164148.

    MLA Style (8th edition)

  • Amin, Abdullah. "MULTISCALE MULTIPHYSICS THERMO-MECHANICAL MODELING OF AN MGB2 BASED CONDUCTION COOLED MRI MAGNET SYSTEM." Doctoral dissertation, Case Western Reserve University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case151385068164148

    Chicago Manual of Style (17th edition)

case151385068164148
946
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This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.