Table 3.
Comparison of the measured coupled resonances of the all-HTS NMR probe with the magnetic coupling model’s predictions before trimming. The magnetic coupling model constructed from measured Knm values predicted constructive modes ω1,3,5 and destructive modes ω2,4,6 with 1.26 and 5.30 RMSPE, respectively. Knm was adjusted to account for mounting errors by using a descent algorithm to minimize RMSPE to 0.82 for ω1,3,5 and 0.76 for ω2,4,6.
Before Trimming | ω1 | ω2 | ω3 | ω4 | ω5 | ω6 |
---|---|---|---|---|---|---|
Measured Resonances (MHz) | 89.520 | 93.338 | 137.704 | 147.670 | 542.130 | 651.369 |
Prediction: Measured Knm (MHz) | 89.988 | 94.436 | 140.636 | 147.750 | 542.754 | 710.705 |
Prediction: Adjusted Knm (MHz) | 90.797 | 94.563 | 137.697 | 147.866 | 542.496 | 651.379 |