Grating Theory and Study of the Magnetostatic Oscillator Frequency

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Abstract
A special type of echelette grating for wavelength measurements of ultra-short electromagnetic waves is described. The one grating may be used over the entire wavelength range from 1 to 10 cm without loss of effectiveness due to an automatically changing groove form which keeps the direction of the center of the diffraction pattern fixed. The formula for the distribution of the energy diffracted from the grating is given and found to agree with the experimental values. The magnetostatic oscillator produces a band of frequencies unless it is adjusted for the conditions at which the tube gives the maximum output, in which case no conclusions as to the width of the band could be drawn as the resolution of the spectrometer was too low.