NASA NTRS · 19790000331
improving maser frequency stability
Abstract
Hydrogen maser frequency standard is more stable by addition of parallel pyrex capillary tube array collimator. With collimator, maser line width has been made as narrow as 0.24 hertz representing fivefold improvement over maser without collimator. Fluorocarbon coating in tubes virtually eliminates energy loss in collimator.
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Crampton, S. B.. 1980-04-01. improving maser frequency stability. https://ntrs.nasa.gov/citations/19790000331
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