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Interferometric surface mapping of a spherical proof mass for ultra precise inertial reference sensors

Kögel, Harald and Weise, Dennis and Sell, Alexander and Fitzsimons, Ewan and Gerardi, Domenico and Johann, U. and Braxmaier, Claus (2016) Interferometric surface mapping of a spherical proof mass for ultra precise inertial reference sensors. Applied Optics, 55 (34). Optical Society of America. doi: 10.1364/AO.55.009830. ISSN 1559-128X.

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In the context of our investigations on novel inertial reference sensors for space applications, we have explored a design utilizing an optical readout of a spherical proof mass. This concept enables full drag-free operations, hence reducing proof mass residual acceleration noise to a minimum. The main limitations of this sensor are errors in position determination of the center of mass of the proof mass due to the surface topography and the involved path length changes upon rotation. One solution is to apply a surface map for correction of the measurement data, thus improving the precision of position determination. This article presents the results of our one-dimensional interferometric surface topography measurements of a sphere, achieving uncertainties of ≈10 nm, as a first step to realize a complete surface map. The measurement setup consists of two heterodyne interferometers positioned in an opposing configuration, which measure the surface topography while the sphere is continuously rotated by a rotation stage.

Item URL in elib:https://elib.dlr.de/111116/
Document Type:Article
Title:Interferometric surface mapping of a spherical proof mass for ultra precise inertial reference sensors
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Weise, Dennisastrium gmbh, friedrichshafen, germanyUNSPECIFIEDUNSPECIFIED
Sell, AlexanderAirbus DS-Space, FriedrichshafenUNSPECIFIEDUNSPECIFIED
Fitzsimons, Ewanairbus defence & space, friedrichshafenUNSPECIFIEDUNSPECIFIED
Gerardi, Domenicoastrium gmbh–satellites, 88039 friedrichshafen, germanyUNSPECIFIEDUNSPECIFIED
Johann, U.eads astrium, friedrichshafenUNSPECIFIEDUNSPECIFIED
Date:November 2016
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Optical Society of America
Keywords:Interferometric, inertial reference sensors
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):Vorhaben Quantensensorik (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systems Enabling Technologies
Deposited By: Hüls, Simone
Deposited On:14 Feb 2017 09:32
Last Modified:10 Jan 2019 15:46

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