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Development of HTS Bulk Magnets for Compact NMR Devices Cooled by Liquid Nitrogen by KIM, SeokBeom is a Engineering article available to read on EtoBox.
What is Development of HTS Bulk Magnets for Compact NMR Devices Cooled by Liquid Nitrogen about?
Synopsis: Compact NMR magnets comprised of stacked HTS bulk annuli trapped using a field cooling (FC) method and cooled by liquid nitrogen have been developed. The strength and homogeneity of the magnetic field required for the NMR relaxometry device are \(1.5 \mathrm{~T}\) and \(150 \mathrm{ppm} / \mathrm{cm}^{3}\), respectively, and these values are much lower than a conventional NMR device. The target magnetic-field strength of over \(1.5 \mathrm{~T}\) at liquid nitrogen temperature can easily be obtained using stacked HTS bulk annuli. However, it is hard to obtain a target field homogeneity above \(150 \mathrm{ppm} / \mathrm{cm}^{3}\) using a conventional superconducting magnet (SCM) as the magnetizing magnet. As a result, experimental and analytical studies have been conducted to improve the spatialfield homogeneity of HTS bulk magnets developed for NMR relaxometry. A method for re-applying the magnetic field, a field compensation method using several iron rings and hybrid model magnet comprised of HTS bulk and HTS coil, has been proposed and its effectiveness was confirmed. Finally, asymmetric problems of magnetic-field uniformity occurred owing to the different \(J_{\mathrm{
Who reads Development of HTS Bulk Magnets for Compact NMR Devices Cooled by Liquid Nitrogen?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- KIM, SeokBeom
- Publisher
- Japan Science and Technology Information Aggregator, Electronic; Cryogenic Association of Japan (ISSN 0389-2441)
- Published
- 2017
- Language
- EN
- Field
- Engineering (Physical Sciences)