Cesium Beam Atomic Time and Frequency Standards
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منابع مشابه
Cesium Beam Atomic Time and Frequency Standards
In recognition of the 0ct)ober 1964 declaration of the International Committee of Weights and Measures that the physical measurement of time be based on a particular transition between two hyperfine levels in the ground state of cesium 133, a review of the characteristics of cesium beam atomic frequency standards is presented. This article discusses the general requirements for frequency and ti...
متن کاملThe Status of Cesium Beam Frequency Standards
There har been a lot ofprogress in cesium beam frequenq standards in the k t few years some of which will be reported here. Optical pumping is being pursued actively in u number of lahorufories. Optically slowed and cooled beums have been demonstrated as well as traps for cold neutral atoms. The microwuve cavity performance with regurd to hculphuse shgt at the beam hoks has been improved by use...
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An experiment has been conducted to investigate the effect of laser line-narrowing on the performance of an optically pumped cesium beam frequency standard. A two laser scheme (4-+4'u for optical pumping and 4+5'7t. for detection) was used and the lasers were either frequency locked to Cs saturated absorption features in an external cell or linenarrowed by optical feedback from an external Fabr...
متن کاملThe Brazilian time and frequency atomic standards program.
Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past four decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. ...
متن کاملCompact extended cavity diode laser system for small optically pumped cesium beam frequency standards
A compact extended cavity diode laser (ECDL) system operating at 852 nm for small optically pumped cesium (Cs) beam frequency standards was reported. ECDL and a saturated absorption spectroscopy setup were all built in an aluminum box with dimension of 10 × 10 × 7 (cm). ECDL was based on a LittmanMetcaff configuration, whose free-running linewidth was less than 600 kHz. A digital automatic freq...
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ژورنال
عنوان ژورنال: Metrologia
سال: 1965
ISSN: 0026-1394,1681-7575
DOI: 10.1088/0026-1394/1/3/004