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Dust Impact Monitor (DIM) onboard Rosetta/Philae: Comparison of experimental results and the theory behind the experiment

Flandes, Alberto and Krüger, Harald and Loose, Alexander and Sperl, Matthias and Seidensticker, Klaus Jürgen and Fischer, Hans-Herbert and Arnold, Walter (2013) Dust Impact Monitor (DIM) onboard Rosetta/Philae: Comparison of experimental results and the theory behind the experiment. Planetary and Space Science, 84 (8), pp. 122-130. Elsevier. DOI: 10.1016/j.pss.2013.05.016 ISSN 0032-0633

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Official URL: http://dx.doi.org/10.1016/j.pss.2013.05.016


The Dust Impact Monitor (DIM) experiment on board the Rosetta spacecraft's lander, Philae, is a cube with three sides covered with piezo-electric (PZT) sensors (total sensitive area: ≈ 70 cm^2 ), aimed at measuring the physical properties of millimetric and sub-millimetric dust particles that move near the surface of comet 67P/Churyumov—Gerasimenko. In this work we study the performance of the DIM Flight Spare (FS) unit based on impact experiments and compare the measurements with the sensor's expected theoretical behavior as derived from Hertz' theory of elastic impact. We present the results of impact experiments performed with spherical particles of different densities and elastic properties. We performed two types of experiments: (a) we analyze the performance of the different sensor sides under identical impacts, and (b) we investigate the performance of DIM under impacts of different materials and different impact speeds. We discuss the possible influence of the microstructure of the PZT sensor on the signal strength and its variation with position of the impacting particles. Our results show that the signal strength and the contact times measured with the DIM PZT sensors can be well approximated by Hertz’ contact mechanics.

Item URL in elib:https://elib.dlr.de/83786/
Document Type:Article
Title:Dust Impact Monitor (DIM) onboard Rosetta/Philae: Comparison of experimental results and the theory behind the experiment
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Flandes, Albertoxytrahx (at) yahoo.com.mxUNSPECIFIED
Krüger, Haraldkrueger (at) mps.mpg.deUNSPECIFIED
Loose, Alexanderloose (at) mps.mpg.deUNSPECIFIED
Sperl, MatthiasMatthias.Sperl (at) dlr.deUNSPECIFIED
Seidensticker, Klaus JürgenKlaus.Seidensticker (at) dlr.deUNSPECIFIED
Fischer, Hans-HerbertHans-Herbert.Fischer (at) dlr.deUNSPECIFIED
Arnold, WalterW.Arnold (at) mx.uni-saarland.deUNSPECIFIED
Date:August 2013
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.pss.2013.05.016
Page Range:pp. 122-130
Keywords:Dust Cometary dust Dust detector Philae Rosetta Lander
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Köln-Porz , Berlin-Adlershof
Institutes and Institutions:Space Operations and Astronaut Training > User center for space experiments (MUSC)
Institute of Planetary Research > Asteroids and Comets
Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Seidensticker, Dr. Klaus J.
Deposited On:22 Aug 2013 08:15
Last Modified:08 Mar 2018 18:48

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