Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5407195 | Journal of Magnetic Resonance | 2008 | 13 Pages |
Abstract
In this work, we investigate the accuracy of controlling spin IÂ =Â 1, 3/2 and 5/2 spin systems by average Hamiltonian theory. By way of example, we consider a simple two-pulse echo sequence and compare this perturbation scheme to a numerical solution of the Von Neumann equation. For the different values of I, we examine this precision as a function of the quadrupolar coupling as well as various experimental parameters such as the pulse spacing and pulse width. Experiments and simulations on IÂ =Â 3/2 and IÂ =Â 5/2 spin systems are presented that highlight a spectral artifact introduced due to finite pulse widths as predicted by average Hamiltonian theory. The control of these spin systems by this perturbation scheme is considered by investigating a phase cycling scheme that suppresses these artifacts to zeroth-order of the Magnus expansion.
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Authors
E.S. Mananga, C.D. Hsu, S. Ishmael, T. Islam, G.S. Boutis,