Cesium beam atomic clocks at the US Naval Observatory provide the basis for all standard time used in this country and worldwide for the Department of Defense - PICRYL Public Domain Search
Cesium Beam Oscillator
File:HP 5061A Cesium Beam Frequency Standard.JPG - Wikimedia Commons
Atomic Clocks
What is a "cesium atomic clock"? - National Research Council Canada
F.T.S. Cesium-Beam Frequency Standard | Smithsonian Institution
Caesium standard - Wikipedia
1: Diagram of a Cesium beam primary frequency standard. The clock... | Download Scientific Diagram
CESIUM ATOMIC CLOCKS
Prototype of "Atomichron" cesium-beam atomic frequency standard | Smithsonian Institution
Atomic Clocks
Cesium Clock and Frequency References | Microsemi
EEVblog #423 - HP5061A Atomic Clock Cesium Beam Frequency Standard - YouTube
Atomic clock | Royal Museums Greenwich
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Cesium clocks
NIST-F1 Cesium Fountain Clock | NIST
Hewlett Packard caesium beam frequency standard type 5061A | Science Museum Group Collection
Diagram of a cesium-beam frequency standard using magnetic state... | Download Scientific Diagram
A Brief History of Atomic Clocks at NIST | NIST
OSA-3230 - Brandywine Communications
The Zeeman spectrum of the 133 Cs atom obtained with the atomic beam... | Download Scientific Diagram
The First Atomic-Beam Clock | National Museum of American History
