Pneumatic switched angle spinning NMR probe with capacitively coupled double saddle coil

J Magn Reson. 2010 Oct;206(2):183-9. doi: 10.1016/j.jmr.2010.07.001. Epub 2010 Jul 29.


Switched angle spinning (SAS) experiments can be used for generating isotropic-anisotropic correlations in oriented samples in a single experiment. In order for these methods to become widespread, specialized hardware is required. Here we describe the electronic and mechanical design and performance of a double-resonance SAS probe. Unlike many previous SAS probe implementations, the focus here is on systems where the dipolar couplings are partially averaged by molecular motion. This probe has a moving double saddle coil capacitively coupled to the stationary circuit. Angle switching is accomplished by a steam engine-type pneumatic mechanism. The speed and stability of the switching hardware for SAS experiments are demonstrated using spectra of model compounds.

Publication types

  • Evaluation Study
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Electric Capacitance
  • Electronics / instrumentation*
  • Equipment Design
  • Equipment Failure Analysis
  • Magnetic Resonance Spectroscopy / instrumentation*
  • Magnetics / instrumentation*
  • Pressure
  • Transducers*