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hydrogen maser

   Also found in: Acronyms 0.03 sec.
hydrogen maser [′hī·drə·jən ′mā·zər]
(physics)
A maser in which hydrogen gas is the basis for providing an output signal with a high degree of stability and spectral purity.


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Because the hydrogen maser is more stable than the cesium clock over short periods of time, it is useful as a secondary time standard and for making high-precision frequency measurements.
 
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