Type of Document	Thesis
Author	Vemaraju, Satish
URN	etd-04192011-153601
Title	Improved NMR Field Mapping in Powered Magnets
Degree	Master of Science
Department	Electrical and Computer Engineering, Department of
Advisory Committee	Advisor Name Title Petru Andrei Committee Chair Jim P. Zheng Committee Member Rajendra K. Arora Committee Member William W. Brey Committee Member
Keywords	Deconvolution Dual Receivers
Date of Defense	2011-02-24
Availability	unrestricted
Abstract Nuclear Magnetic Resonance (NMR) field mapping is a highly accurate tool that can be used to determine the homogeneity of the magnetic field of a strong laboratory magnet. Typically, an NMR signal is observed from a small experimental sample as it traces a helical path inside the magnet with the help of a stepper motor. However, high field powered magnets such as those used at the National High Magnetic Field Laboratory are subject to noise from power supplies and cooling water. To the effect of noise on the field map, an NMR reference probe that remains at a fixed location is added to reduce the effect of temporal fluctuation on the field map. The NMR mapping system is interfaced to a spectrometer having dual digital receivers and the tests are carried out on a 7.1 Tesla superconducting magnet. This research is an important step toward effectively utilizing powered magnets for high resolution NMR experiments.
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