Calculating Temperature Distribution of Uniplanar Gradient Coils for Unilateral NMR Magnet Based on Fourier Analysis

Resumo

In this paper, a Fourier analytical method to calculate temperature distribution of uniplanar gradient coils for unilateral nuclear magnetic resonance (NMR) magnet is presented. A model of uniplanar gradient coils used for unilateral NMR magnet is presented. Fourier analysis reveals the structure of the spatial filters that solve the two-dimensional screened Poisson equation and shows the temperature distribution to be a well-defined sharpen filter of the dissipated power. Subsequently, target field method is used for the gradient coil design for unilateral magnet and the hot spot temperature of the uniplanar gradient coils with different sharpen filters are compared through simulation. Practical measurement has shown that the structure of the spatial filters made a great contribution to the distribution of the hot spot temperature.