Advantages resulting from the addition of a versatile multichannel analyser to an electron spin resonance spectrometer.

Abstract

A MULTICHANNEL analyser has been added to our electron spin resonance spectrometer to be used as a computer of average transients1. This communication describes the elements of the system and some of the important advantages that a versatile analyser can provide. Briefly, the principle of the computer of average transients is that successive sweeps of a spectrum are added in a multichannel memory system, so that the signal, coherent with each sweep, adds linearly in the memory, while the noise, which is random, adds in quadrature. This results in an improvement of signal-to-noise ratio after N sweeps of √N.