Details

Autor(en) / Beteiligte

• Majoros, M
• Sumption, M D
• Parizh, M
• Wan, F
• Rindfleisch, M A
• Doll, D
• Tomsic, M
• Collings, E W

Titel

Magnetic, Mechanical and Thermal Modeling of Superconducting, Whole-body, Actively Shielded, 3 T MRI Magnets Wound Using MgB 2 Strands for Liquid Cryogen Free Operation

Ist Teil von

• IEEE transactions on applied superconductivity, 2022-06, Vol.32 (4), p.1-4

Ort / Verlag

United States

Erscheinungsjahr

2022

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• we present magnetic, mechanical and thermal modeling results for a 3 Tesla actively shielded whole body MRI (Magnetic Resonance Imaging) magnet consisting of coils with a square cross section of their windings. The magnet design was a segmented coil type optimized to minimize conductor length while hitting the standard field quality and DSV (Diameter of Spherical Volume) specifications as well as a standard, compact size 3 T system. It had an overall magnet length and conductor length which can lead to conduction cooled designs comparable to NbTi helium bath cooled 3 T MRI magnets. The design had a magnetic field homogeneity better than 10 ppm (part-per-million) within a DSV (Diameter of Spherical Volume) of 48 cm and the total magnet winding length of 1.37 m. A new class of MgB strand especially designed for MRI applications was considered as a possible candidate for winding such magnets. This work represents the first magnetic, mechanical and thermal design for a whole-body 3 T MgB short (1.37 m length) MRI magnet based on the performance parameters of existing MgB wire. 3 Tesla MRI magnet can operate at 20 K at 67 % of its critical current.