Cesium Fountain Clock ·
Atoms Tossed to Define the Second
un
seel
.com · cooled to a millionth of a degree, tossed a metre up · 9,192,631,770 ticks = one second
Speed
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Height
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Ramsey T
0.00 s
Phase
LASER COOLING
Six 852 nm cooling lasers
Cesium ball — about 1 µK
Microwave cavity — 9,192,631,770 Hz
Probe laser — reads the atoms
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