FIG. 2.
Pulse sequence used to observe multiple spin correlations following a magic echo. For the observation of multiple spin correlations following the FID, the first magic sandwich is removed as are the delays τ before and after it. The time suspension sequence is used to suppress artifacts and suspend evolution under the dipolar interaction.25 The delays T′ and δ are adjusted so that the refocusing of the dipolar interaction peaks after instrumental ringdown following the end of the final magic sandwich. The flip angle θ1′ = ω1T′.