Coil Design for Large-Volume High-B1Homogeneity for Solid-State NMR Applications
โ Scribed by A.F. Privalov; S.V. Dvinskikh; H.-M. Vieth
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 137 KB
- Volume
- 123
- Category
- Article
- ISSN
- 1064-1858
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โฆ Synopsis
The design of a solenoidal NMR coil with high-B 1 homogeneity turns and thus to significant field variations in the vicinity for high-frequency solid-state NMR is described. The coil is made of the conductor. This effect is particularly pronounced at of thin ribbon of continuously variable width. The width is varied high frequencies when the number of turns must be kept to minimize inhomogeneity in the axial direction. The field distrismall. In both designs, optimization of the coil was done bution throughout the entire volume of the sample was taken into only for the B 1 field on the coil axis without taking into account. The gap between turns is constant and kept small to account the field distribution throughout the volume of the minimize field inhomogeneity in the radial direction. For large sample.
samples in particular, coils of this design tested at 300 MHz show
New coil designs with improved characteristics become significantly better homogeneity than helical coils with constant feasible using computer-controlled machining. The design pitch or coils with variable pitch but fixed ribbon width. แญง 1996 described here, which uses this technique, avoids the diffi-Academic Press, Inc.
culties mentioned above and allows improved field homogeneity in both the radial and the axial directions. The B 1
๐ SIMILAR VOLUMES
The design, construction, and performance of a low-inductance solenoidal coil with high B 0 homogeneity for fast-field-cycling NMR is presented. It consists of six concentric layers. The conductor width is varied to minimize the B 0 inhomogeneity in the volume of the sample. This is done using an al