Abstract: | The timekeeping ability of a prototype small passive hydrogen maser developed at NBS was recently compared to UTC(NBS) based on 10 cesium frequency standards including a large primary standard, NBS-4. The frequency of the passive maser was monitored as a function of source pressure, cavity temperature, microwave power, modulation width, and magnetic field. Based on these measurements one would expect a frequency stability of better than 6 x 10+ over many days, implying a timekeeping ability of order 0.5 ns/day. Measurements vs. UTC(NBS) indicate a joint timekeeping stability of order 1.2 ns/day. |
Published in: |
Proceedings of the 12th Annual Precise Time and Time Interval Systems and Applications Meeting December 2 - 4, 1980 Goddard Space Flight Center Greenbelt, Maryland |
Pages: | 785 - 804 |
Cite this article: | Walls, F.L., Howe, D.A., "Precision Timekeeping Using a Small Passive Hydrogen Maser," Proceedings of the 12th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, December 1980, pp. 785-804. |
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