Figure 11.

Peak simulated $T_2^{\mathrm{c}}$ using a CH₆ spin‐system at ${\nu }_{\mathrm{r}}=12\mathrm{kHz}$ and ${\nu }_0^{\mathrm{H}}=400\mathrm{MHz}$ under TPPM decoupling. Values are optima over a range of phase excursions $0^{\circ }\le \varphi \le {51}^{\circ }$ . Results from simulations with only amplitude transients (${\lambda }_{\mathrm{trans}}=28{\mu \mathrm{s}}^{-1},{\lambda }_Q=0{\mu \mathrm{s}}^{-1}$ ) were negligibly different from those with no transients, and both are represented by black triangles. RF inhomogeneity was incorporated with 20 RF points using a nutation spectrum acquired on the same μMAS probe.