![]() ![]() ![]() Operating Temperature Range (Nominal-Maximum)Īs-wound homogeneity over (110-mm 20-mm long) Winding Pitch (Conductor Center to Center) Total Number of Turns (Turns/one pancake) In contrast, the mechanical approach uses a combination of two DC fields. While this approach has worked in a low-field copper magnet, it is not possible with a higher field superconducting magnet, as the induced AC losses will surely quench the magnet. In the electrical concept, the rotating field is achieved by creating time-varying fields in the three coordinate directions. 1, two concepts for creating a rotating magic-angle field are depicted-electrical and mechanical. A superconducting magnet is the only way to achieve this field enhancement. ![]() When our project is successfully completed, the strength of the spinning field will be increased by greater than 400 times. Although the group next built a permanent-magnet-based 0.5-T magic-angle field magnet, they dwelled on shimming the non-rotating magnet and did not perform any NMR experiments. Their magic-angle-field magnet, a set of three orthogonal copper coil pairs, generated a spinning field of 36.3 gauss. The first magic-angle spinning-field experiment was performed by the UC Berkeley group. The ultimate aim of this project is to extend the power of localized magnetic resonance scanning to anisotropic samples and apply this unique technique to all living matter. The microscopic susceptibility cannot be shimmed, so it leads to a loss of information by spectral broadening. ![]() muscles, lungs, bone structures, fibers, etc.), because, for other parts of the body, the line-broadening is prohibitive for quantitative studies. Currently, magnetic resonance imaging is limited to regions of homogeneous tissue (e.g., parts of the brain, breast) and does not offer its full potential in metabolism studies of other parts of the body (mainly those having an anisotropic morphology, e.g. MRI is one of the most powerful techniques to study body biology in a non-invasive three-dimensional manner. ![]()
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January 2023
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