Switching-angle sample spinning NMR probe with a commercially available 20 kHz spinning system

A switching-angle sample spinning (SASS) probe workable at high spinning speeds was developed using a commercially available rotor/housing system. Details of the construction are described. As application examples of the SASS probe, we report experiments of powder pattern separation at the spinning speed of 20 kHz and broadband 13C-13C polarization transfer at 16 kHz.