A magnetic-resonance detector with frequency scanning and modulation

Abstract

Different variants of designing a magnetic-resonance detector on the basis of a self-excited generator (autodyne) for continuous (stationary) technique with frequency scanning and modulation were tested. The conditions for the minimum frequency dependence of the oscillation amplitude were found. The circuit diagrams of autodynes and the universal amplitude-control unit were developed. The capabilities of the developed autodynes are illustrated by magnetic-resonance spectra that were recorded at the first harmonic of the modulation frequency using the differential scan method in a zero magnetic field. Recommendations on the use of the proposed autodynes in spectrometry and magnetometry are given.