Abstract #2676

Unilateral Linear Halbach magnets for single sided magnetic resonance: generalized design framework and experimental validation

Ashvin Bashyam^1,2, Matthew Li^2,3, and Michael Cima^2,4

¹Electrical Engineering & Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ²David H. Koch Institute For Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States, ³Harvard–MIT Program of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁴Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States

Single-sided NMR has the potential for broad utility, especially as a portable diagnostic for disorders in fluid regulation. These sensors require a remote, high field, uniform magnetic field to achieve sufficient sensitivity. We demonstrate a new magnet geometry, the Unilateral Linear Halbach, that combines design principles from sweet-spot and linear Halbach magnets to achieve this goal. Sensitivity analysis using finite element analysis produces a generalized framework for Unilateral Linear Halbach design. Experimental validation through the fabrication of a magnet assembly shows close agreement with the simulated magnetic field. Unilateral Linear Halbach magnets increase the sensitivity, portability, and versatility of single sided NMR.

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