Enhancing Radio-frequency Pulses Using a Field Shielding Device in a Solid-state NMR Sample Tube

We have developed a sample tube for solid-state NMR that enables the application of high -intensity radiofrequency (rf) fields. Herein, an rf-shielding device is inserted into the tube, and the sample is loaded between them. The flux of the rf-field is compressed into the sample space, resulting in a high -intensity rf-field at the sample. A prototype was used to investigate the rf-field strength at the sample, which can be increased to twice that of the compared device.