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dc.contributor.authorArmano, M.
dc.contributor.authorAudley, H.
dc.contributor.authorAuger, G.
dc.contributor.authorBaird, J.
dc.contributor.authorBinetruy, P.
dc.contributor.authorRamos Castro, Juan José
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.identifier.citationArmano, M., Audley, H., Auger, G., Baird, J., Binetruy, P., Ramos, J. Charge-induced force noise on free-falling test masses: results from LISA pathfinder. "Physical review letters", 26 Abril 2017, vol. 118, núm. 17, p. 171101-1-171101-7.
dc.description.abstractWe report on electrostatic measurements made on board the European Space Agency mission LISA Pathfinder. Detailed measurements of the charge-induced electrostatic forces exerted on free-falling test masses (TMs) inside the capacitive gravitational reference sensor are the first made in a relevant environment for a space-based gravitational wave detector. Employing a combination of charge control and electric-field compensation, we show that the level of charge-induced acceleration noise on a single TM can be maintained at a level close to 1.0¿¿fm¿s-2¿Hz-1/2 across the 0.1–100 mHz frequency band that is crucial to an observatory such as the Laser Interferometer Space Antenna (LISA). Using dedicated measurements that detect these effects in the differential acceleration between the two test masses, we resolve the stochastic nature of the TM charge buildup due to interplanetary cosmic rays and the TM charge-to-force coupling through stray electric fields in the sensor. All our measurements are in good agreement with predictions based on a relatively simple electrostatic model of the LISA Pathfinder instrument.
dc.subjectÀrees temàtiques de la UPC::Física::Astronomia i astrofísica
dc.subject.lcshGravitational waves
dc.subject.lcshLaser interferometers
dc.subject.otherCapacitive sensors
dc.subject.otherCosmic ray measurement
dc.subject.otherElectric fields
dc.subject.otherElectrostatic force
dc.subject.otherFrequency bands
dc.subject.otherGravity waves
dc.subject.otherInterplanetary flight
dc.subject.otherLaser interferometry
dc.subject.otherStochastic systems
dc.subject.otherDedicated measurements
dc.subject.otherDifferential accelerations
dc.subject.otherElectrostatic measurements
dc.subject.otherElectrostatic modeling
dc.subject.otherEuropean Space Agency
dc.subject.otherGravitational reference sensors
dc.subject.otherGravitational wave detectors
dc.subject.otherLaser interferometer space antenna
dc.titleCharge-induced force noise on free-falling test masses: results from LISA pathfinder
dc.subject.lemacOnes gravitacionals
dc.subject.lemacInterferometria làser
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorArmano, M.; Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Ramos, J.
local.citation.publicationNamePhysical review letters

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