First uncertainty evaluation of the FoCS-2 primary frequency standard

被引：21

作者：

Jallageas, A. ^{[1
]}

Devenoges, L. ^{[2
]}

Petersen, M. ^{[3
]}

Morel, J. ^{[1
]}

Bernier, L. G. ^{[1
]}

Schenker, D. ^{[2
]}

Thomann, P. ^{[2
]}

Suedmeyer, T. ^{[2
]}

机构：

[1] Fed Inst Metrol METAS, Photon Time & Frequency Lab, CH-3003 Bern, Switzerland

[2] Univ Neuchatel, Inst Phys, Lab Temps Frequence, Ave Bellevaux 51, CH-2000 Neuchatel, Switzerland

[3] CNRS, FEMTO ST, 32 Ave Observ, F-25044 Besancon, France

来源：

METROLOGIA | 2018年 / 55卷 / 03期

基金：

瑞士国家科学基金会;

关键词：

atomic clocks; primary frequency standards; continuous atomic fountain; caesium; DISTRIBUTED CAVITY PHASE; CESIUM FOUNTAIN CLOCK; ACCURACY EVALUATION; POWER DEPENDENCE; SHIFTS;

D O I：

10.1088/1681-7575/aab3fa

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report the uncertainty evaluation of the Swiss continuous primary frequency standard FoCS-2 (Fontaine Continue Suisse). Unlike other primary frequency standards which are working with clouds of cold atoms, this fountain uses a continuous beam of cold caesium atoms bringing a series of metrological advantages and specific techniques for the evaluation of the uncertainty budget. Recent improvements of FoCS-2 have made possible the evaluation of the frequency shifts and of their uncertainties in the order of 1 x 10(-15). When operating in an optimal regime a relative frequency instability of 8 x 10(-14)(tau/s)-1/2 is obtained. The relative standard uncertainty reported in this article, 1.99 x 10(-15), is strongly dominated by the statistics of the frequency measurements.

引用

页码：366 / 385

页数：20

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