Slotted tube resonator: A new NMR probe head at high observing frequencies

Abstract

Superconducting magnetic systems permit increasing observing frequencies for NMR experiments. The sensitivity and range of application of the single-layer detection system is evaluated. High measuring frequencies demand new detection systems because the conventional detection systems lose their good features above about 100 MHz. In this paper a new detection system is presented. The slotted tube resonator (STR) is suitable for all intensities of magnetic field which will be produced in the near future. The characteristic parameters of the STR are calculated and the construction is described in detail. Theoretical sensitivity considerations are compared with practical measurements.