cesium atomic clocks

E116184

atomic clock timekeeping device

Cesium atomic clocks are ultra-precise timekeeping devices that use the microwave frequency of cesium atoms’ electron transitions to define and maintain the international standard for the second.

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All labels observed (5)

Label	Occurrences
NIST-F1	1
NIST-F1 cesium fountain clock	1
NIST-F2 cesium fountain clock	1
cesium atomic clocks canonical	1
cesium fountain clock	1

Statements (48)

Predicate	Object
instanceOf	atomic clock ⓘ timekeeping device ⓘ
associatedWithOrganization	International Bureau of Weights and Measures ⓘ surface form: Bureau International des Poids et Mesures National Institute of Standards and Technology ⓘ National Physical Laboratory ⓘ surface form: National Physical Laboratory (UK)
basedOn	hyperfine transition of cesium-133 ground state ⓘ
comparedWith	optical atomic clocks ⓘ
controlledBy	atomic transition frequency ⓘ
defines	SI second ⓘ
developedFor	high-precision time standards ⓘ
enables	definition of the SI second since 1967 ⓘ
firstRealizedIn	1950s ⓘ
hasAccuracy	on the order of 10^-16 relative uncertainty for primary standards ⓘ
hasComponent	cesium beam tube ⓘ detector for atomic state ⓘ feedback control system ⓘ frequency synthesizer ⓘ magnetic shielding ⓘ microwave cavity ⓘ quartz oscillator ⓘ vacuum system ⓘ
hasLimitation	lower frequency than optical clocks ⓘ
hasProperty	long-term frequency stability ⓘ low drift over time ⓘ
hasVariant	cesium beam clock ⓘ cesium atomic clocks self-linksurface differs ⓘ surface form: cesium fountain clock space-qualified cesium clock ⓘ
maintains	international standard for the second ⓘ
measurementPrinciple	resonant interaction of microwaves with cesium atoms ⓘ
operatesAtFrequency	9,192,631,770 hertz ⓘ
operatesIn	microwave region of the electromagnetic spectrum ⓘ
requires	stable magnetic field ⓘ temperature control ⓘ ultra-high vacuum ⓘ
stabilizes	microwave oscillator frequency ⓘ
standardizedBy	International Committee for Weights and Measures ⓘ
usedFor	fundamental physics experiments ⓘ global navigation satellite systems timing ⓘ international timekeeping ⓘ metrology ⓘ realization of Coordinated Universal Time ⓘ realization of International Atomic Time ⓘ telecommunications synchronization ⓘ
usedIn	ground-based timing laboratories ⓘ satellite systems ⓘ time distribution networks ⓘ
uses	cesium atoms ⓘ microwave frequency transitions of cesium atoms ⓘ

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

International Atomic Time → basedOn → cesium atomic clocks ⓘ

National Institute of Standards and Technology → operates → cesium atomic clocks ⓘ

this entity surface form: NIST-F1 cesium fountain clock

National Institute of Standards and Technology → operates → cesium atomic clocks ⓘ

this entity surface form: NIST-F2 cesium fountain clock

cesium atomic clocks → hasVariant → cesium atomic clocks self-linksurface differs ⓘ

this entity surface form: cesium fountain clock

U.S. Naval Observatory Master Clock → relatedTo → cesium atomic clocks ⓘ

this entity surface form: NIST-F1