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Development of Cs atomic fountain frequency standard at CRL

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6 Author(s)
M. Kumagai ; Commun. Res. Lab., Atomic Frequency Standards Group, Tokyo, Japan ; H. Ito ; K. Fukuda ; M. Kajita
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Communications research laboratory (CRL) has been developing a Cesium atomic fountain primary frequency standard. Cs atoms are cooled to below 2 μK by both magneto-optical trap (MOT) and polarization gradient cooling (PGC), and launched vertically by moving molasses method. The launched atoms pass through a microwave cavity twice, on the way upward and downward, and give rise to Ramsey resonance. We succeeded to observe narrower than 1Hz Ramsey signal, and tried to lock the microwave frequency to the atomic resonance. This report presents the current status of the development of CRL atomic fountain.

Published in:

Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003 IEEE International

Date of Conference:

4-8 May 2003