The Atomic Hydrogen Maser

URI: https://gptkb.org/entity/The_Atomic_Hydrogen_Maser

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:frequency_standard gptkb:atomic_clock
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
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	gptkb:hydrogen_atom
gptkbp:bfsParent	gptkb:David_Wineland
gptkbp:bfsLayer	6
https://www.w3.org/2000/01/rdf-schema#label	The Atomic Hydrogen Maser