Finite element analysis of the temperature distribution within a Conduction-Cooled, MgB-based MRI superconducting coil segment.

Superconducting magnets used for Magnetic Resonance Imaging (MRI) scanners need to keep temperature gradients minimized in order to retain thermal and operating current margin. We have used 3D finite element analysis (FEA) simulation in COMSOL Multiphysics software that includes both conductive heat transfer and radiative heating to calculate the temperature distribution both along the winding direction and across the cross-section of an MRI segment coil at its equilibrium operating temperature. We have also modelled the evolution of the thermal properties during cool-down from ambient temperature.

Accelerators, Gantries, Magnets and Imaging Systems for Particle Beam Therapy: Recent Status and Prospects for Improvement.

The paper begins by emphasizing the clinical and commercial importance of proton or other charged particle such as carbon ion therapy, refers to the manufacturers of such systems of which more than 120 are installed or under construction worldwide by April 2021. A general review of charged particle therapy systems refers to six manufacturers and provides in tabular form some details of systems installed in the US, Europe, Asia, and elsewhere. In a description of the principles of particle beam therapy a comparison is made of the properties of photons (x-rays) versus protons and protons versus carbon ions.

Study of Superconducting, Structural, and Thermal Properties of SnO Added MgB Bulks.

A series of SnO added MgB bulk superconductors were prepared by route to study the effect of oxygen doping on superconducting and structural properties of MgB. Several (MgB) (SnO) samples were fabricated with ranging from 0, 3 wt%, 4 wt%, and 6 wt%. Upper critical field ( ) and irreversible field ( ) were measured by physical property measurement system.