Limits to the sensitivity of a low noise compact atomic gravimeter

Gouët, Julien Le; Mehlstäubler, T. E.; Kim, J.; Merlet, Sébastien; Clairon, A.; Landragin, Arnaud; Santos, F. Pereira Dos

doi:10.1007/s00340-008-3088-1

Cited by 271 publications

(285 citation statements)

References 32 publications

(37 reference statements)

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“…The design of the filter is described in detail in [12]. It consists in the product of a recursive IIR (Infinite Impulse Response) filter, with corner frequencies f 0 and f 1 , and a non-causal low-pass filter.…”

Section: B Digital Filteringmentioning

confidence: 99%

Operating an atom interferometer beyond its linear range

Merlet¹,

Gouët²,

Bodart³

et al. 2009

Metrologia

119

120

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In this paper, we show that an atom interferometer inertial sensor, when associated to the auxiliary measurement of external vibrations, can be operated beyond its linear range and still keep a high acceleration sensitivity. We propose and compare two measurement procedures (fringe fitting and nonlinear lock) that can be used to extract the mean phase of the interferometer when the interferometer phase fluctuations exceed 2π. Despite operating in the urban environment of inner Paris without any vibration isolation, the use of a low noise seismometer for the measurement of ground vibrations allows our atom gravimeter to reach at night a sensitivity as good as 5.5×10 −8 g at 1 s. Robustness of the measurement to large vibration noise is also demonstrated by the ability of our gravimeter to operate during an earthquake with excellent sensitivity. Our high repetition rate allows for recovering the true low frequency seismic vibrations, ensuring proper averaging.Such techniques open new perspectives for applications in other fields, such as navigation and geophysics. * Electronic address: franck.pereira@obspm.fr

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Section: B Digital Filteringmentioning

confidence: 99%

Operating an atom interferometer beyond its linear range

Merlet¹,

Gouët²,

Bodart³

et al. 2009

Metrologia

119

120

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“…To date, two different kinds of precise absolute gravimeters are employed in watt balance experiments: a classical interferometer measuring the acceleration of a free falling retroreflector 27 or an atom interferometer. 28 5. A summary of the commonalities and highlight of the main differences between watt balance experiments, as well as the history and progress on accurate measurements of the Planck constant, were published in a recent paper.…”

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confidence: 99%

Invited Article: A precise instrument to determine the Planck constant, and the future kilogram

Haddad

Seifert

Chao

et al. 2016

Review of Scientific Instruments

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A precise instrument, called a watt balance, compares mechanical power measured in terms of the meter, the second, and the kilogram to electrical power measured in terms of the volt and the ohm. A direct link between mechanical action and the Planck constant is established by the practical realization of the electrical units derived from the Josephson and the quantum Hall effects. We describe in this paper the fourth-generation watt balance at the National Institute of Standards and Technology (NIST), and report our initial determination of the Planck constant obtained from data taken in late 2015 and the beginning of 2016. A comprehensive analysis of the data and the associated uncertainties led to the SI value of the Planck constant, h = 6.626 069 83(22) × 10−34 J s. The relative standard uncertainty associated with this result is 34 × 10−9.

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“…L'enceinte à vide est placée sur une plateforme d'isolation passive pour limiter les vibrations du miroir de rétroréflection. De plus, un sismomètre placé au sommet de l'enceinte permet de postcorriger ces vibrations et d'améliorer la sensibilité de mesure [45,46].…”

Section: Dispositifunclassified

Détermination de l’accélération de la pesanteur pour la balance du watt du LNE

Merlet¹,

Gillot²,

Farah³

et al. 2015

R. franç. métrol.

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RésuméLe projet « balance du watt » propose de relier la définition du kilogramme à la constante de Planck. La pesée de la masse impliquée nécessite une détermination de l'accélération de la pesanteur g avec une exactitude meilleure que 10 −8 . Les travaux résumés dans cet article visent à réaliser cette détermination à l'aide d'un gravimètre atomique et d'un site gravimétrique dédié. MOTS CLÉS: GRAVIMÉTRIE, CARTOGRAPHIE GRAVIMÉTRIQUE, MODÉLISATION GRAVIMÉTRIQUE, INTERFÉROMÉTRIE ATOMIQUE, BALANCE DU WATT. AbstractThe "watt balance" project aims at linking the kilogram definition to the Planck constant. The weighing of the mass involved requires a determination of the acceleration g with an uncertainty better than 10 −8 . This work aims at determining g with an atomic gravimeter and a dedicated gravimetric site.

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Limits to the sensitivity of a low noise compact atomic gravimeter

Cited by 271 publications

References 32 publications

Operating an atom interferometer beyond its linear range

Operating an atom interferometer beyond its linear range

Invited Article: A precise instrument to determine the Planck constant, and the future kilogram

Détermination de l’accélération de la pesanteur pour la balance du watt du LNE

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