First performance results of PTB's atomic caesium fountain and a study of contributions to its frequency instability

被引：20
|
作者：
Weyers, S [1 ]
Bauch, A [1 ]
Hübner, U [1 ]
Schröder, R [1 ]
Tamm, C [1 ]
机构：
[1] Phys Tech Bundesanstalt, D-38110 Braunschweig, Germany
来源：
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2000年 / 47卷 / 02期
关键词：
D O I：
10.1109/58.827431
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
At the Physikalisch-Technische Bundesanstalt (PTB), an atomic caesium fountain was constructed. Ramsey fringes with a full width at half maximum (FWHM) of 0.86 Hz were obtained by launching the atoms to a height of 83 cm above the cooling region (40 cm above the microwave cavity center). A first measurement of the homogeneity of the magnetic flux density yields 0.33 nT (rms), only 0.16% of the mean value of 0.205 mu T used in normal operation. The inherent elementary noise contributions of the fountain and of a thermal beam atomic clock are compared in some detail.
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页码：432 / 437
页数：6
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