High-resolution solenoid coil nuclear magnetic resonance probe for superconducting magnet spectrometers

A broadband probe having a tuning range of 20 to 65 MHz has been designed and built specifically to give maximum sensitivity per unit volume of sample. This is accomplished through use of a solenoid rf coil instead of the usual Helmholtz coil found in commercial probes for superconducting magnet systems. Improvement in signal-to-noise ratios approaches a factor of 3. Probe design considerations and construction materials are described.