Effects of radial radio-frequency field inhomogeneity on MAS solid-state NMR experiments

Abstract. Radio-frequency field inhomogeneity is one of the most common imperfections in NMR experiments. They can lead to imperfect flip angles applied radio-frequency (rf) pulses or a mismatch resonance conditions, resulting artefacts degraded performance In solid-state under magic angle spinning (MAS), radial component becomes time-dependent because rf irradiation amplitude and phase modulated with integer multiples frequency. We analyse influence such MAS-modulated fields on some commonly used building blocks This analysis based analytical Floquet calculations numerical simulations, taking into account time dependence field. find that, compared static part inhomogeneity, modulations play very minor role degradation investigated typical