Efficient magnet configuration for low-field nuclear magnetic resonance applications

By miniaturizing instrumentation, nuclear magnetic resonance (NMR) can be brought into new domains and potentially revolutionize molecular analysis. The key towards miniaturization is using a small, portable magnet while maintaining strict field homogeneity. This work presents novel annulus designs as well as implementations of the previously researched Halbach array. The annulus designs, although competitive in field strength, lack the required homogeneity for NMR applications. However, experimental results show the Halbach array has the best homogeneity of our magnet configurations and can readily be adopted for NMR relaxometry. With modest additions, the Halbach array may also be a viable magnet design for NMR spectroscopy. Impressive homogeneity results combined with low-cost (under $3.00), portability, and ease of construction show the presented magnet design can make a significant impact in miniaturizing NMR devices and expanding NMR applications.Electrical and Computer Engineerin