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Figure 6
Representation of two sequences of close proton polarization. (1) The cycle of AFP-modulated polarization (blue) starts at t = 0 with a half-cycle of 46 s followed by 40 s of DNP and 6 s relaxation. At the end of each half-cycle (vertical lines of grey dots), the application of AFP leads to an important reduction of the polarization of the close protons that will be shown below in Fig. 12[link]. This cycle is repeated 70 times. (2) The sequence of alternating directions of DNP (orange) works at a much faster rhythm of 10 s per period. The cycle is repeated several thousand times (Zimmer et al., 2016View full citation).

IUCrJ
Volume 12| Part 5| September 2025| Pages 570-581
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525005871