Abstract
‘The present system design’ summarizes the theoretical model, the physical realization and the operational analysis of the automatic cavity frequency stabilization system based upon square wave modulation of the resonance frequency of the cavity in the atomic hydrogen maser. The effect produced on the maser output frequency by various perturbations of the cavity frequency is calculated and the theoretical results are compared with the experimental measurements. ‘Possible improvements’ describes an improved design of the cavity frequency control system. An analysis of the new servo response to cavity frequency perturbations is given and the improvement expected in hydrogen maser frequency stability compared with previous maser performance is discussed.
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