Proceedings of the IRE · 1959 · 24 citations · 4 references
EngineeringElectrical EngineeringMetrologyMicroelectronicsQuality AssuranceFrequency MetrologyMeasurement ErrorMeasurement StandardsStandard UnitsAtomic Frequency StandardsBeam SystematicsCesium Frequency StandardsFrequency Standards
Cesium atomic beam frequency standards of different design have been compared, and the principal sources of errors in these devices have been studied. The unresolved discrepancy found between the standards was about 2 parts in 1010. The characteristics of the standard, sources of errors, and the details of the comparison tests are discussed in this paper.
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An Atomic Standard of Frequency and Time Interval: A Cæsium Resonator
L. Essen, J. V. L. PARRY · Nature · 1955 · 286 citations
Comparison of C;æsium Frequency Standards of Different Construction
L. Essen, J. V. L. PARRY, J.H. Holloway et al. · Nature · 1958 · 10 citations