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Broadband Transmission EPR Spectroscopy
Figure 6
Long helical cells with continuously varying B1 versus B angle.
The sample-compartment lengths are 75, 300, and 1215 cm, respectively. The coax is wound around a supporting piece of elastomer into a helix or a toroidal helix.
doi: https://doi.org/10.1371/journal.pone.0059874.g006