Cunha, João T.Sebastião, Pedro J.Roque, AntónioVaz da Silva, VSousa, Duarte M.2021-07-052021-07-052021-09CUNHA, João T.; [et al] – Design overview of a toroidal fast-field cycling electromagnet. Renewable Energy and Power Quality Journal (RE&PQJ) (19 th International Conference on Renewable Energies and Power Quality (ICREPQ’21)). ISSN 2172-038X. Vol. 19 (2021), pp. 1-52172-038Xhttp://hdl.handle.net/10400.21/13515In this paper, the design and development of a novel Fast-Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer’s electromagnet is described. This magnet is tailored to increase the relaxometers’s usability, by increasing its portability capacities. It presents a compact toroidal shaped iron core, allowing to operate in a field range of 0 to 0.21 T, with high field homogeneity (less than 800 ppm in a volume of ≈ 0.57 cm3 ), low power consumption and reduced losses (about 40W). The simulation software COMSOL Multiphysics® is used to characterize the induced magnetic field, the heating and the cooling effects. The proposed optimized layout constitutes an innovative solution for FFC magnets.engFast-field cyclingNuclear magnetic resonanceNMR electromagnetPortable NMRconference object