A LOW-FREQUENCY NMR PROBE

A probe for a low-frequency pulse NMR spectrometer with crossed coils has been designed. The probe is based on operational amplifiers and has an operating frequency of 3.6 MHz, a gain of 43 dB, and a noise factor of 1.8 dB. The damping unit of the pickup coil, which is integrated into the probe, reduces the complete recovery time of the receiving section of the spectrometer down to 15 μs. © 2010 Pleiades Publishing, Ltd.