MICROSCOPE: systematic errors

Rodrigues, Manuel; Touboul, Pierre; Métris, Gilles; Robert, Alain; Dhuicque, Océane; Bergé, Joël; André, Y.; Boulanger, Damien; Chhun, Ratana; Christophe, Bruno; Cipolla, Valerio; Danto, Pascale; Foulon, Bernard; Guidotti, Pierre-Yves; Hardy, Émilie; Huynh, Phuong-Anh; Lebat, Vincent; Liorzou, Françoise; Pouilloux, Benjamin; Prieur, Pascal; Reynaud, Serge; Torresi, Patrizia

doi:10.1088/1361-6382/ac49f6

Cited by 12 publications

(79 citation statements)

References 16 publications

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“…The EP limits come from torsion balance experiments described in Section V E [451,452,673] and the MICROSCOPE satellite [30,42,454]. MICROSCOPE aims to tests the EP in orbit to an ultimate precision of 10 −15 using electrostatic accelerometers on board a drag-free microsatellite [674], with current results based on a fraction of their data [42,454]. Torsion balance experiments that are up to a factor of 10 more sensitive are in preparation at the University of Washington.…”

Section: Combined Exclusion Plots and Projections For Future Experimentsmentioning

confidence: 99%

New Horizons: Scalar and Vector Ultralight Dark Matter

Antypas¹,

Banerjee²,

Bartram³

et al. 2022

Preprint

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The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight (< 10 eV) bosonic dark matter that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches for wavelike scalar and vector dark matter candidates.

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Section: Combined Exclusion Plots and Projections For Future Experimentsmentioning

confidence: 99%

New Horizons: Scalar and Vector Ultralight Dark Matter

Antypas¹,

Banerjee²,

Bartram³

et al. 2022

Preprint

View full text Add to dashboard Cite

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“…In addition, the calibration of the instrument detailed in Ref. [15] (scale factor, alignment, non-linearities, thermal sensitivities) as well as the evaluation of its stability over time were regularly performed in order to optimise the science output of the mission. These calibration sessions were regularly performed before or after EP test sessions.…”

Section: Implemented Scenariomentioning

confidence: 99%

“…The calibration method is detailed in Ref. [15]. It consists of applying a reference signal at f cal in the DFACS loop for all "CAL" type sessions.…”

Section: N2 Levelmentioning

confidence: 99%

“…Table 6 gives the list of the selected sessions with the attribute "-1" and "-2" when the session is split into two segments. In this table, the SUEP sessions #148 and #160 are not listed because they do not fulfil the criteria of a non-linearity coefficient lower than 14000 s ´2 [9,15]. SUEP session #430 was also discarded because it was performed 20 0 C higher than the other sessions: this session was used to check the temperature sensitivity for test-mass relative off-center positions.…”

Section: N2 Levelmentioning

confidence: 99%

“…In Refs. [9][10][11][12][13][14][15][16], "differential acceleration" is used for the difference of measurement acceleration…”

Section: N2 Levelmentioning

confidence: 99%

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MICROSCOPE Mission scenario, ground segment and data processing

Rodrigues,

Touboul,

Métris

et al. 2022

Preprint

Self Cite

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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. The science sessions had a duration of 120 orbits maximum and were regularly repeated and spaced out to accommodate operational constraints but also in order to repeat the experiment in different conditions and to allow time to calibrate the instrument. Several science sessions were performed over the 2.5 year duration of the experiment. This paper aims to describe how the data have been produced on the basis of a mission scenario and a data flow process, driven by a tradeoff between the science objectives and the operational constraints. The mission was led by the Centre National d'Etudes Spatiales (CNES) which provided the satellite, the launch and the ground operations. The ground segment was distributed between CNES and Office National d'Etudes et de Recherches Aérospatiales (ONERA). CNES provided the raw data through the Centre d'Expertise de Compensation de Traînée (CECT: Drag-free expertise centre). The science was led by the Observatoire de la Côte d'Azur (OCA) and ONERA was in charge of the data process. The latter also provided the instrument and the Science Mission Centre of MICROSCOPE (CMSM).

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A newly designed decoupling method for micro-Newton thrust measurement

Mao

Gao³

et al. 2023

Review of Scientific Instruments

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A decoupling method is proposed for micro-Newton thrust measurement with a torsion pendulum. The basic approach is to reduce the influences introduced by the propellant tube and wires of the thruster. A hollow aluminum tube is used to hang the torsion pendulum and is also chosen as the transport pipe for the propellant of the thruster. The electric control box of the thruster is mounted on the pendulum body, which is powered by an externally installed power supply through a liquid metal conductive unit. The control of the electric control box is performed through wireless transmission. With this design, the influences of the propellant tube and connection wires between the torsion pendulum and the outside device are reduced and the stability of the torsion spring constant of the system can be improved. The use of the liquid metal conductive unit reduces the coupling between the wires and the measurement system. The feasibility of the wireless transmission is analyzed. The error sources during the thrust measurement are analyzed, and the expected three σ uncertainty of the thrust is [Formula: see text]N for the measurement of the cold gas thruster. The scheme provides a thrust measurement with higher precision and stability.

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MICROSCOPE: systematic errors

Cited by 12 publications

References 16 publications

New Horizons: Scalar and Vector Ultralight Dark Matter

New Horizons: Scalar and Vector Ultralight Dark Matter

MICROSCOPE Mission scenario, ground segment and data processing

A newly designed decoupling method for micro-Newton thrust measurement

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