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Feedback schemes for radiation damping suppression in NMR: a control-theoretical perspective

TitleFeedback schemes for radiation damping suppression in NMR: a control-theoretical perspective
Publication TypeJournal Article
Year of Publication2010
AuthorsAltafini, C, Cappellaro, P, Cory, D
JournalSystems and Control Letters, 59 (12):782-786, 2010
Abstract

In NMR spectroscopy, the collective measurement is weakly invasive and its back-action is called radiation damping. The aim of this paper is to provide a control-theoretical analysis of the problem of suppressing this radiation damping. It is shown that the two feedback schemes commonly used in the NMR practice correspond one to a high gain oputput feedback for the simple case of maintaining the spin 1/2 in its inverted state, and the second to a 2-degree of freedom control design with a prefeedback that exactly cancels the radiation damping field. A general high gain feedback stabilization design not requiring the knowledge of the radiation damping time constant is also investigated.

URLhttp://hdl.handle.net/1963/4384
DOI10.1016/j.sysconle.2010.09.004

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