hydrogen maser


Also found in: Acronyms.

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.
References in periodicals archive ?
Both atomic clock designs have proved resistant to radiation effects, with GIOVE-B's passive hydrogen maser - designed to lose less than one second every three million years - running so well that errors cannot be spotted easily over the general measurement system noise.
OroliaAbout T4ScienceT4Science, a Swiss company of the Orolia group, is a global leading designer and manufacturer of advanced, high performance hydrogen maser clock references.
But these are too big, too heavy, and too likely to need servicing to put on the satellite, so instead the local oscillator signal will be piped up from the tracking stations, each of which has its own hydrogen maser.
They also rely on a wide range of Symmetricom precise timing solutions, including their hydrogen maser clock for maintaining standard time as well as four Symmetricom time servers for distributing time across its internal network.
The new earth observatory in Ny-Ealesund shall therefore procure an active hydrogen maser.
When applied to a hydrogen maser, which produces microwave radiation of a specific frequency, a nonlinear correction to quantum mechanics would mean the maser's output frequency depends on the number of excited hydrogen atoms pouring into the cavity where the device amplifies the radiation.
Contract notice: Active Hydrogen Maser Sg 115813 PW/SG.
Solicitation: Steerable clock system consisting of 75001-109-lpn hydrogen maser with low phase noise option and 85000-502 aux.
Acquisition Adds Hydrogen Maser to Datum's Comprehensive Timing Product Line
Maintenance contract for 6 active hydrogen maser series EFOS C BKG for 3 years.
The New Earth Observatory in Ny-Ealesund will therefore buy an active hydrogen maser.