Computer Science – Performance
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jtf....27...41p&link_type=abstract
Journal of Time and Frequency (ISSN 1001-1544), Vol. 27, No. 1, p. 41 - 47 (2004)
Computer Science
Performance
Hydrogen Maser, Cavity Auto-Tuning, Frequency Stability, Temperature Control
Scientific paper
The hydrogen maser is the generally available frequency standard with the smallest frequency instability for all but the shortest measuring time interval. However, the output frequency of the hydrogen maser changes due to the changes of ambient temperature and the aging of high-Q resonant cavity, which leads to the deterioration of the long-term performance. In order to reduce these influences, an auto-tuning system has been developed to ensure working on the desired frequency for the resonant cavity and a new temperature control system has been designed to improve long-term performance. In view of all the relevant problems in hydrogen masers, the existing hydrogen masers have been improved technically and the hydrogen maser SOHM-4 has been developed based on the experiences of foreign atomic standard laboratories. The characteristics of the improved design, the performance expectation and the primary results of the hydrogen maser SOHM-4 are described in this paper.
Cai Yong
Peng Ke
Zhai Zao-Cheng
Zhang Wei-Qun
Zhang Yan-Jun
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