Chinese Journal of Magnetic Resonance ›› 2010, Vol. 27 ›› Issue (3): 425-435.

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Periodic Control of Spin Turbulence in Solution Magnetic Resonance

 Susie Y. HUANG, Jamie D. WALLS, LIN Yung-Ya   

  1. Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
  • Received:2010-07-16 Online:2010-09-05 Published:2010-09-05

Abstract:

Chaotic spin dynamics arising from the joint action of radiation damping and the distant dipolar field are shown to generate irreproducible measurements in popular high-field gradient magnetic resonance experiments, a phenomenon more general than previously thought. A periodic control scheme based on radio-frequency perturbations is developed that decreases the leading Lyapunov exponent and reduces observed fluctuations to within intrinsic spectrometer instability. General guidelines for designing and integrating such schemes into existing pulse sequences to suppress spin chaos are discussed.

Key words: transient spin chaos, radiation damping, distant dipolar field, chaos control, signal amplification

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