The Atomic Hydrogen Maser

URI: https://gptkb.org/entity/The_Atomic_Hydrogen_Maser
GPTKB entity
Statements (43)
Predicate Object
gptkbp:instanceOf atomic clock
frequency standard
gptkbp:accuracy ~1 part in 10^15
gptkbp:alternativeName gptkb:atomic_hydrogen_maser
gptkb:hydrogen_maser
gptkbp:category metrology
quantum electronics
precision measurement
gptkbp:component gptkb:vacuum
microwave cavity
storage bulb
magnetic shield
state selector
gptkbp:firstDemonstrated gptkb:Harvard_University
gptkbp:hasWikipediaPage https://en.wikipedia.org/wiki/Hydrogen_maser
https://www.w3.org/2000/01/rdf-schema#label The Atomic Hydrogen Maser
gptkbp:inventedBy gptkb:Norman_Ramsey
gptkb:H._Dehmelt
1960
gptkbp:maintenance requires hydrogen gas supply
requires vacuum maintenance
gptkbp:maserType active maser
passive maser
gptkbp:notableFor gptkb:Deep_Space_Network
gptkb:Global_Positioning_System_(GPS)
gptkb:International_Atomic_Time_(TAI)
gptkb:Very_Long_Baseline_Interferometry_(VLBI)
gptkbp:operates microwave transition
gptkbp:patent 1960
gptkbp:powerOutput ~1 microwatt
gptkbp:principle quantum mechanics
stimulated emission
gptkbp:relatedTo gptkb:cesium_atomic_clock
gptkb:rubidium_atomic_clock
gptkbp:sensitivity high
gptkbp:stable high
gptkbp:transitionFrequency 1,420,405,751.768 Hz
gptkbp:usedFor radio astronomy
timekeeping
frequency calibration
gptkbp:uses hydrogen atom
gptkbp:bfsParent gptkb:David_Wineland
gptkbp:bfsLayer 6