Gilles Métris
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View article: Platform and environment requirements of a satellite quantum test of the Weak Equivalence Principle at the $10^{-17}$ level
Platform and environment requirements of a satellite quantum test of the Weak Equivalence Principle at the $10^{-17}$ level Open
The Space Time Explorer and QUantum Equivalence principle Space Test (STE-QUEST) recently proposed, aims at performing a precision test of the weak equivalence principle (WEP), a fundamental cornerstone of General Relativity. Taking advant…
View article: The MICROSCOPE space mission to test the equivalence principle
The MICROSCOPE space mission to test the equivalence principle Open
International audience
View article: MICROSCOPE: past, present and future
MICROSCOPE: past, present and future Open
International audience
View article: STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept
STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept Open
Space-borne quantum technologies, particularly those based on atom interferometry, are heralding a new era of strategic and robust space exploration. The unique conditions of space, characterized by low noise and low gravity environments, …
View article: Has MICROSCOPE revealed a violation of the equivalence principle?
Has MICROSCOPE revealed a violation of the equivalence principle? Open
International audience
View article: Result of the MICROSCOPE weak equivalence principle test
Result of the MICROSCOPE weak equivalence principle test Open
The space mission MICROSCOPE dedicated to the test of the equivalence principle (EP) operated from April 25, 2016 until the deactivation of the satellite on October 16, 2018. In this analysis we compare the free-fall accelerations ( a A an…
View article: MICROSCOPE mission: data analysis principle
MICROSCOPE mission: data analysis principle Open
After performing highly sensitive acceleration measurements during two years of drag-free flight around the Earth, MICROSCOPE provided the best constraint on the weak equivalence principle (WEP) to date. Beside being a technological challe…
View article: Microscope instrument in-flight characterization
Microscope instrument in-flight characterization Open
Since the MICROSCOPE instrument aims to measure accelerations as low as a few 10 −15 m s −2 and cannot operate on ground, it was necessary to have a large time dedicated to its characterization in flight. After its release and first operat…
View article: MICROSCOPE mission: statistics and impact of glitches on the test of the weak equivalence principle <sup>*</sup>
MICROSCOPE mission: statistics and impact of glitches on the test of the weak equivalence principle <sup>*</sup> Open
MICROSCOPE’s space test of the weak equivalence principle (WEP) is based on the minute measurement of the difference of accelerations experienced by two test masses as they orbit the Earth. A detection of a violation of the WEP would appea…
View article: MICROSCOPE’s constraint on a short-range fifth force
MICROSCOPE’s constraint on a short-range fifth force Open
The MICROSCOPE experiment was designed to test the weak equivalence principle in space, by comparing the low-frequency dynamics of cylindrical ‘free-falling’ test masses controlled by electrostatic forces. We use data taken during technica…
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>M</mml:mi><mml:mi>I</mml:mi><mml:mi>C</mml:mi><mml:mi>R</mml:mi><mml:mi>O</mml:mi><mml:mi>S</mml:mi><mml:mi>C</mml:mi><mml:mi>O</mml:mi><mml:mi>P</mml:mi><mml:mi>E</mml:mi></mml:math> Mission: Final Results of the Test of the Equivalence Principle
Mission: Final Results of the Test of the Equivalence Principle Open
The MICROSCOPE mission was designed to test the weak equivalence principle (WEP), stating the equality between the inertial and the gravitational masses, with a precision of 10^{-15} in terms of the Eötvös ratio η. Its experimental test co…
View article: MICROSCOPE: the test of the equivalence principle in space and its final data processing
MICROSCOPE: the test of the equivalence principle in space and its final data processing Open
International audience
View article: MICROSCOPE Mission scenario, ground segment and data processing
MICROSCOPE Mission scenario, ground segment and data processing Open
Testing the Weak Equivalence Principle (WEP) to a precision of $10^{-15}$ requires a quantity of data that give enough confidence on the final result: ideally, the longer the measurement the better the rejection of thestatistical noise. Th…
View article: MICROSCOPE mission scenario, ground segment and data processing
MICROSCOPE mission scenario, ground segment and data processing Open
Testing the weak equivalence principle to a precision of 10 −15 requires a quantity of data that give enough confidence on the final result: ideally, the longer the measurement the better the rejection of the statistical noise. The science…
View article: MICROSCOPE: systematic errors
MICROSCOPE: systematic errors Open
The MICROSCOPE mission aims to test the weak equivalence principle (WEP) in orbit with an unprecedented precision of 10 −15 on the Eötvös parameter thanks to electrostatic accelerometers on board a drag-free micro-satellite. The precision …
View article: Description et validation de l'instrument de MICROSCOPE
Description et validation de l'instrument de MICROSCOPE Open
International audience
View article: MICROSCOPE: systematic errors
MICROSCOPE: systematic errors Open
The MICROSCOPE mission aims to test the Weak Equivalence Principle (WEP) in orbit with an unprecedented precision of 10$^{-15}$ on the Eötvös parameter thanks to electrostatic accelerometers on board a drag-free micro-satellite. The precis…
View article: MICROSCOPE instrument description and validation
MICROSCOPE instrument description and validation Open
This paper focuses on the dedicated accelerometers developed for the MICROSCOPE mission taking into account the specific range of acceleration to be measured on board the satellite. Considering one micro-g and even less as the full range o…
View article: Exploring the foundations of the physical universe with space tests of the equivalence principle
Exploring the foundations of the physical universe with space tests of the equivalence principle Open
We present the scientific motivation for future space tests of the equivalence principle, and in particular the universality of free fall, at the 10 − 17 level or better. Two possible mission scenarios, one based on quantum technologies, t…
View article: The local dark sector
The local dark sector Open
View article: The local dark sector
The local dark sector Open
We speculate on the development and availability of new innovative propulsion techniques in the 2040s, that will allow us to fly a spacecraft outside the Solar System (at 150 AU and more) in a reasonable amount of time, in order to directl…
View article: Methods to determine thermal sensitivity of T-SAGE instrument for MICROSCOPE mission
Methods to determine thermal sensitivity of T-SAGE instrument for MICROSCOPE mission Open
View article: Constraints on chameleon gravity from the measurement of the electrostatic stiffness of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>M</mml:mi><mml:mi>I</mml:mi><mml:mi>C</mml:mi><mml:mi>R</mml:mi><mml:mi>O</mml:mi><mml:mi>S</mml:mi><mml:mi>C</mml:mi><mml:mi>O</mml:mi><mml:mi>P</mml:mi><mml:mi>E</mml:mi></mml:math> mission accelerometers
Constraints on chameleon gravity from the measurement of the electrostatic stiffness of the mission accelerometers Open
This article is dedicated to the use the MICROSCOPE mission's data to test\nchameleon theory of gravity. We take advantage of the technical sessions aimed\nto characterize the electrostatic stiffness of MICROSCOPE's instrument\nintrinsic t…
View article: MICROSCOPE. mission analysis, requirements and expected performance
MICROSCOPE. mission analysis, requirements and expected performance Open
The MICROSCOPE mission aimed to test the weak equivalence principle (WEP) to a precision of 10 −15 . The WEP states that two bodies fall at the same rate on a gravitational field independently of their mass or composition. In MICROSCOPE, t…
View article: MICROSCOPE instrument in-flight characterization
MICROSCOPE instrument in-flight characterization Open
Since the MICROSCOPE instrument aims to measure accelerations as low as a few 10$^{-15}$\,m\,s$^{-2}$ and cannot operate on ground, it was obvious to have a large time dedicated to its characterization in flight. After its release and firs…
View article: MICROSCOPE's constraint on a short-range fifth force
MICROSCOPE's constraint on a short-range fifth force Open
The MICROSCOPE experiment was designed to test the weak equivalence principle in space, by comparing the low-frequency dynamics of cylindrical "free-falling" test masses controlled by electrostatic forces. We use data taken during technica…
View article: MICROSCOPE Satellite and its Drag-Free and Attitude Control System
MICROSCOPE Satellite and its Drag-Free and Attitude Control System Open
This paper focus on the description of the design and performance of the MICROSCOPE satellite and its Drag-Free and Attitude Control System (DFACS). The satellite is derived from CNES' Myriade platform family, albeit with significant upgra…
View article: MICROSCOPE mission: Statistics and impact of glitches on the test of the weak equivalence principle
MICROSCOPE mission: Statistics and impact of glitches on the test of the weak equivalence principle Open
MICROSCOPE's space test of the weak equivalence principle (WEP) is based on the minute measurement of the difference of accelerations experienced by two test masses as they orbit the Earth. A detection of a violation of the WEP would appea…
View article: MICROSCOPE Satellite and its Drag-Free and Attitude Control System
MICROSCOPE Satellite and its Drag-Free and Attitude Control System Open
This paper focus on the description of the design and performance of the\nMICROSCOPE satellite and its Drag-Free and Attitude Control System (DFACS). The\nsatellite is derived from CNES' Myriade platform family, albeit with\nsignificant up…
View article: MICROSCOPE mission: Data analysis principle
MICROSCOPE mission: Data analysis principle Open
After performing highly sensitive acceleration measurements during two years of drag-free flight around the Earth, MICROSCOPE provided the best constraint on the Weak Equivalence Principle (WEP) to date. Beside being a technological challe…