Computer assisted optimization of magnetic field homogeneity in nuclear magnetic resonance spectroscopy

dc.contributor.committeeMemberDeming, Stanley N.
dc.contributor.committeeMemberWillcott, Mark Robert, III
dc.contributor.committeeMemberGeanangel, Russell A.
dc.contributor.committeeMemberGray, Horace B., Jr.
dc.contributor.committeeMemberWentworth, Wayne E.
dc.creatorJansen, Joseph A., Jr.
dc.description.abstractA historical review of experimental measures taken to improve magnetic field homogeneity is presented, followed by a rationale for the present approach to improving field homogeneity. An electronic instrument has been constructed which can be operated by computer control to improve the field homogeneity of a Varian V-7405 15-inch electromagnet, used with the University of Houston Varian XL-IOO nuclear magnetic resonance spectrometer. This new unit replaces the Varian 924029 homogeneity control unit which can only be operated manually by turning potentiometers. The performance of the unit is demonstrated for both proton and carbon-13 nuclear magnetic resonance spectroscopy. Resolution closely approaching the best resolution seen in the published proton n.m.r. spectra of orthodichlorobenzene has been achieved. The advantage of a computer controlled electronic homogeneity control unit is that the field homogeneity can be regulated more precisely and can be kept in continual tune during long signal averaging runs, effectively increasing the signal to noise ratio for a given period of signal averaging.
dc.description.departmentChemistry, Department of
dc.format.digitalOriginreformatted digital
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.titleComputer assisted optimization of magnetic field homogeneity in nuclear magnetic resonance spectroscopy
dc.type.genreThesis of Natural Sciences and Mathematics, Department of of Houston of Science


Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
2.59 MB
Adobe Portable Document Format