Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2019Measuring ejecta characteristics and momentum transfer in experimental simulation of kinetic impact
Schimmerohn, Martin; Watson, Erkai; Gulde, Max; Kortmann, Lukas; Schäfer, Frank
Journal Article
2019Optical fragment tracking in hypervelocity impact experiments
Watson, Erkai; Gulde, Max; Kortmann, Lukas; Higashide, Masumi; Schäfer, Frank; Hiermaier, Stefan
Journal Article
201870-116-GHz LNAs in 35-nm and 50-nm gate-length metamorphic HEMT technologies for cryogenic and room-temperature operation
Thome, Fabian; Leuther, Arnulf; Gallego, Juan Daniel; Schäfer, Frank; Schlechtweg, Michael; Ambacher, Oliver
Conference Paper
2018Additive manufactured structures for the 12U nanosatellite ERNST
Schimmerohn, Martin; Bierdel, Marius; Gulde, Max; Sholes, Darren; Pfaff, Aron; Pielok, Michael; Hoschke, Klaus; Horch, Clemens; Schäfer, Frank
Conference Paper
2018Architecture of highly integrated cryogenic active planar OrthoMode transducer for the 3-mm band
Valente, G.; Navarrini, A.; Schaefer, F.; Serres, P.; Thome, Fabian
Conference Paper
2018Compact dual-polarization cryogenic receiver module for the 75-116 GHz band
Navarrini, Alessandro; Valente, Giuseppe; Serres, Patrice; Schäfer, Frank; Thome, Fabian; Garnier, Olivier
Conference Paper
2018Design of active waveguide OMT for radio astronomy receiver array in the 3 mm band
Navarrini, Alessandro; Valente, Giuseppe; Serres, Patrice; Schäfer, Frank; Thome, Fabian; Garnier, Olivier
Conference Paper
2018Experimental impact cratering: A summary of the major results of the MEMIN research unit
Kenkmann, Thomas; Deutsch, Alex; Thoma, Klaus; Ebert, Matthias; Poelchau, Michael; Buhl, Elmar; Carl, Eva-Regine; Danilewsky, Andreas; Dresen, Georg; Dufresne, Anja; Durr, Nathanaël; Ehm, Lars; Grosse, Christian; Gulde, Max; Güldemeister, Nicole; Hamann, Christopher; Hecht, Lutz; Hiermaier, Stefan; Hoerth, Tobias; Kowitz, Astrid; Langenhorst, Falko; Lexow, Bernd; Liermann, Hanns-Peter; Luther, Robert; Mansfeld, Ulrich; Moser, Dorothee; Raith, Manuel; Reimold, Wolf Uwe; Sauer, Martin; Schäfer, Frank; Schmitt, Ralf Thomas; Sommer, Frank; Wilk, Jakob; Winkler, Rebecca; Wünnemann, Kai
Journal Article
2018Fast view factor determination for thermal modelling
Gulde, Max; Montemayor Mancías, Javier; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2018Initial study on non-catastrophic damage risk for all-electric satellite transferring to GEO
Higashide, M.; Schimmerohn, M.; Schäfer, F.
Conference Paper
2018Integrating a large nanosatellite from CubeSat components - challenges and solutions
Horch, Clemens; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2018Managing high thermal loads in small satellites - Analysis, design, and verification of a 3D-printed radiator
Gulde, M.; Sido, A.; Pielok, M.; Hoschke, K.; Schäfer, F.; Schimmerohn, M.
Conference Paper
2018Measuring impact craters on the ISS Columbus Module
Putzar, Robin; Gulde, Max; Sabath, Dieter; Fiedler, Hauke; Drolshagen, Gerhard; Braukhane, Andy; Horstmann, Andre; Wiedemann, Carsten; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2018Optical fragment tracking in hypervelocity impact experiments
Watson, Erkai; Gulde, Max; Schäfer, Frank; Hiermaier, Stefan
Conference Paper
2018Pandapower - an Open-Source Python Tool for Convenient Modeling, Analysis and Optimization of Electric Power Systems
Thurner, L.; Scheidler, A.; Schäfer, F.; Menke, J.; Dollichon, J.; Meier, F.; Meinecke, S.; Braun, M.
Journal Article
2018Reliable, fast, and flexible: A thermal modeling approach for small satellites
Gulde, Max; Montemayor Mancías, Javier; Genova, Christopher de; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2018Robust optical tracking of individual ejecta particles in hypervelocity impact experiments
Gulde, Max; Kortmann, Lukas; Ebert, Matthias; Watson, Erkai; Wilk, Jakob; Schäfer, Frank
Journal Article
2018Towards flight qualification of an additively manufactured nanosatellite component
Bierdel, Marius; Hoschke, Klaus; Pfaff, Aron; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2018Trajectory based 3D fragment tracking in hypervelocity impact experiments
Watson, Erkai; Maas, Hans-Gerd; Schäfer, Frank; Hiermaier, Stefan
Conference Paper
2017A concept for an ultra-low power sensor network - detecting and monitoring disaster events in underground metro systems
Vincke, Jonah; Kempf, Scott; Schnelle, Niklas; Horch, Clemens; Schäfer, Frank
Conference Paper
2017The D-MEN sampling device - extracting and collecting asteroid material for sample return
Schimmerohn, Martin; Watson, Erkai; Hupfer, Jan; Pfaff, Aron; Falke, Albert; Schäfer, Frank
Presentation
2017Design and layout of an energy autarkic wireless sensor network in underground metro tunnels
Kempf, Scott; Schnelle, Niklas; Vincke, Jonah; Schäfer, Frank
Conference Paper
2017High-speed optical tracking of individual ejecta particles from hypervelocity impacts
Kortmann, Lukas; Watson, Erkai; Ebert, Matthias; Schäfer, Frank; Gulde, Max
Conference Paper
2017An MWIR payload with FPGA-based data processing for a 12U nanosatellite
Horch, Clemens; Schnelle, Niklas; Gulde, Max; Watson, Erkai; Schimmerohn, Martin; Schäfer, Frank
Conference Paper
2017Ultra-low power sensor system for disaster event detection in metro tunnel systems
Vincke, Jonah; Kempf, Scott; Schnelle, Niklas; Horch, Clemens; Schäfer, Frank
Journal Article
2016Asteroid deflection using a kinetic impactor: Insights from hypervelocity impact experiments
Hoerth, T.; Schäfer, F.
Abstract
2016Concept for a new light-gas gun type hypervelocity accelerator
Putzar, R.; Schäfer, F.
Journal Article
2016Cryogenic 50-nm mHEMT MMIC LNA for 67-116 GHz with 34 K noise temperature
Kotiranta, M.; Türk, S.; Schäfer, F.; Leuther, A.; Goliasch, J.; Massler, H.; Schlechtweg, M.
Conference Paper
2016Experimental cratering into layered targets. Memin experiments with maggia gneiss
Poelchau, M.H.; Winkler, R.; Schäfer, F.; Kenkmann, T.
Abstract
2016Fast and flexible space debris risk assessment for satellites
Gulde, Max; Kempf, Scott; Schäfer, Frank
Journal Article
2016SenSE4Metro: A bi-national multi-disciplinary project for monitoring underground metro environments in disaster events
Kempf, S.; Schäfer, F.; Sitharam, G.; Kleist, P.; Gräfling, W.; Ferguson, N.; Stuchtey, T.; Chakraborty, T.; Matsagar, V.; Gebbeken, N.
Conference Paper
2016Simplified S/C vulnerability assessments at component level in early design phase at ESA's CDF
Kempf, S.; Schäfer, F.; Cardone, T.; Ferreira, I; Gerene, S.; Destefanis, R.; Grassi, L.
Conference Paper
2016Simplified spacecraft vulnerability assessments at component level in early design phase at the European Space Agency's concurrent design facility
Kempf, S.; Schäfer, F.; Cardone, T.; Ferreira, I.; Gerené, S.; Destefanis, R.; Grassi, L.
Journal Article
2016Stability investigation of large gate-width metamorphic high electron-mobility transistors at cryogenic temperature
Moschetti, G.; Thome, F.; Ohlrogge, M.; Goliasch, J.; Schäfer, F.; Aja, B.; Leuther, A.; Schlechtweg, M.; Seelmann-Eggebert, M.; Ambacher, O.; Wieching, G.; Kotiranta, M.
Journal Article
2016Structural and erosive effects of lightning on sandstone: An experimental investigation
Haddad, Houssam; Ebert, Matthias; Kenkmann, Thomas; Thoma, Klaus; Nau, Siegfried; Schäfer, Frank
Abstract
2016Subsurface deformation of experimental hypervolcity impacts in nonporous targets
Winkler, R.; Poelchau, M.H.; Schäfer, F.; Kenkmann, T.
Abstract
2015Distributed fiber optical sensing inside the foundation slab of a high-rise building
Horch, C.; Hupfer, J.; Schäfer, F.
Conference Paper
2015EMI's TwinGun - concept for a new light-gas gun type hypervelocity accelerator
Putzar, R.; Schäfer, F.
Journal Article, Conference Paper
2015High level software development for a stand-alone data processing and storage unit for a microsatellite hyperspectral payload
Horch, C.; Domse, N.; Schäfer, F.; Buhl, M.
Conference Paper
2015Momentum transfer in hypervelocity impact experiments on rock targets
Hoerth, T.; Schäfer, F.; Hupfer, J.; Millon, O.; Wickert, M.
Journal Article, Conference Paper
2015NEOSHIELD - A global approach to near-earth object impact threat mitigation
Drube, L.; Harris, A.W.; Hoerth, T.; Michel, P.; Perna, D.; Schäfer, F.
Book Article
2015Reconfigurable cryptographic subsystem for Cubesats
Domse, N.; Weber, M.; Schäfer, F.
Conference Paper
2015Short and long term efficiencies of debris risk reduction measures: Application to a European LEO mission
Lang, T.; Kervarc, R.; Bertrand, S.; Carle, P.; Donath, T.; Destefanis, R.; Grassi, L.; Tiboldo, F.; Schäfer, F.; Kempf, S.; Gelhaus, J.
Journal Article
2015Subsurface deformation in hypervelocity cratering experiments into high-porosity tuffs
Winkler, R.; Poelchau, M.H.; Moser, S.; Hoerth, T.; Schäfer, F.; Kenkmann, T.
Abstract
2014A combined sensor data management system for structural health monitoring and building safety and security
Horch, C.; Schäfer, F.
Conference Paper
2014Cryogenic low noise amplifier development for 67-116 GHz
Kotiranta, M.; Bruch, D.; Leuther, A.; Massler, H.; Seelmann-Eggebert, M.; Schlechtweg, M.; Ambacher, O.; Türk, S.; Goliasch, J.; Schäfer, F.
Conference Paper
2014Electrical signatures of hypervelocity impact plasma with applications in in-situ particle detection
Rudolph, Martin; Schimmerohn, Martin; Osterholz, Jens; Schäfer, Frank
Journal Article, Conference Paper
2014Energieautarkes Funksensornetzwerk zur Erhöhung der Sicherheit in Bahntunnels bei terroristischen Anschlägen mit Sprengstoffen
Schäfer, F.; Stolz, A.; Reindl, L.; Thoma, K.
Journal Article
2014Impact cratering experiments into quartzite, sandstone and tuff: The effects of projectile size and target properties on spallation
Poelchau, M.; Kenkmann, T.; Hoerth, T.; Schäfer, F.; Rudolf, M.; Thoma, K.
Journal Article
2014Impulstransfermessungen bei Einschlägen von Projektilen im Hypervelocitybereich
Schäfer, G.; Haas, D.; Schäfer, F.
Conference Paper
2014In situ measurements of impact-induced pressure waves in sandstone targets
Hoerth, T.; Schäfer, F.; Nau, S.; Kuder, J.; Poelchau, M.; Thoma, K.; Kenkmann, T.
Journal Article
2014Modellversuche zur Untersuchung des Impulstransfers durch Impakt unterschiedlicher Projektilgeometrien auf asteroidenähnliche Materialien
Reichenbach, N.; Hupfer, J.; Hoerth, T.; Schäfer, F.
Conference Paper
2014Satellite vulnerability to space debris - an improved 3D risk assessment methodology
Grassi, Lilith; Tiboldo, Francesca; Destefanis, Roberto; Donath, Thérèse; Winterboer, Arne; Evans, Leanne; Janovsky, Rolf; Kempf, Scott; Rudolph, Martin; Schäfer, Frank; Gelhaus, Johannes
Journal Article
2014Susceptibility of solar arrays to micrometeroid and space debris impact
Schimmerohn, M.; Rott, M.; Gerhard, A.; Schäfer, F.; D'Accolti, G.
Conference Paper
2013Automatisierte Informationsgewinnung und Schutz kritischer Infrastruktur im Katastrophenfall (AISIS)
Millon, Oliver; Schäfer, Frank; Stolz, Alexander; Riedel, Werner
Report
2013Computational methodology to predict satellite system-level effects from impacts of untrackable space debris
Welty, N.; Rudolph, M.; Schäfer, F.; Apeldoorn, J.; Janovsky, R.
Journal Article
2013Crater morphology in sandstone targets: The MEMIN impact parameter study
Dufresne, A.; Poelchau, M.H.; Kenkmann, T.; Deutsch, A.; Hoerth, T.; Schäfer, F.; Thoma, K.
Journal Article
2013Deformation and melting of steel projectiles in hypervelocity cratering experiments
Kenkmann, T.; Trullenque, G.; Deutsch, A.; Hecht, L.; Ebert, M.; Salge, T.; Schäfer, F.; Thoma, K.
Journal Article
2013Environmental conditions-based analysis of energy harvesting systems for wireless sensor networks
Kempf, S.; Schäfer, F.
Conference Paper
2013The European Union funded NEOShield project: A global approach to near-Earth object impact threat mitigation
Harris, A.W.; Barucci, M.A.; Cano, J.L.; Fitzsimmons, A.; Fulchignoni, M.; Green, S.F.; Hestroffer, D.; Lappas, V.; Lork, W.; Michel, P.; Morrison, D.; Payson, D.; Schäfer, F.
Journal Article
2013Evaluation of enhanced shielding configurations against hypervelocity particle impacts for future unmanned spacecraft
Hupfer, Jan; Putzar, Robin; David, Matthieu; Aridon, Gwenaëlle; Gergonne, Bernard; Cougnet, Claude; Schäfer, Frank
Conference Paper
2013The extra-large light-gas gun of the Fraunhofer EMI: Applications for impact cratering research
Lexow, B.; Wickert, M.; Thoma, K.; Schäfer, F.; Poelchau, M.H.; Kenkmann, T.
Journal Article
2013Hypervelocity impacts on dry and wet sandstone
Hoerth, T.; Schäfer, F.; Thoma, K.; Kenkmann, T.; Poelchau, M.H.; Lexow, B.; Deutsch, A.
Journal Article
2013The MEMIN research unit: Scaling impact cratering experiments in porous sandstones
Poelchau, MH.; Kenkmann, T.; Thoma, K.; Hoerth, T.; Dufresne, A.; Schäfer, F.
Journal Article
2013Time-resolved emission spectroscopy of impact plasma
Heunoske, Dominic; Schimmerohn, M.; Osterholz, J.; Schäfer, F.
Conference Paper, Journal Article
2012Cloud Angebote in Deutschland - die Expertensicht aus der Praxis: Cloud-Angebot und gute Kundenbeziehung
Weiner, Nico; Schäfer, Frank; Speck, Christian
Book Article
2012Computational methodology to predict satellite system-level effects from impacts of untrackable space debris
Welty, N.; Rudolph, M.; Schäfer, F.; Apeldoorn, J.; Janovsky, R.
Conference Paper
2012Debris Shielding for Inflatable Structures Development and Characterization at Hypervelocity Impacts
Destefanis, R.; Faraud, M.; Rudolph, M.; Weber, K.E.; Lambert, M.; Schäfer, F.
Conference Paper
2012Extending the Applicable Range of the SRL Ballistic Limit Equation to Oblique Hypervelocity Impacts
Rudolph, M.; Welty, N.; Putzar, R.; Schäfer, F.; Koebel, D.; Scheper, M.; Janovsky, R.; Apeldoorn, J.; Lambert, M.
Conference Paper
2012HVI-test setup of in-situ space debris detector
Bauer, W.; Romberg, O.; Wiedemann, C.; Putzar, R.; Schäfer, F.; Drolshagen, G.; Vörsmann, P.
Conference Paper
2012Impact cratering experiments into quartzite and tuff: First results from the MEMIN research unit
Poelchau, M.H.; Hoerth, T.; Schäfer, F.; Deutsch, A.; Thoma, K.; Kenkmann, T.
Conference Paper, Journal Article
2012A noise source module for In-Situ noise figure measurements from DC to 50 GHz at cryogenic temperatures
Bruch, Daniel; Amils, R.I.; Gallego, J.D.; Seelmann-Eggebert, M.; Aja, B.; Schäfer, F.; Diez, C.; Leuther, A.; Schlechtweg, M.; Ambacher, O.; Kallfass, I.
Journal Article
2012P 2-rotect: Prediction, protection & reduction of orbital exposure to collision threats - General overview and first results
Merit, S.; Donath, T.; Janovsky, R.; Apeldoom, J.; Destefanis, R.; Schäfer, F.; Kutdemir, E.; Gelhaus, J.; Makri, E.
Conference Paper
2012Self-synchronized energy efficient event detection with wireless sensor networks
Erd, M.; Kostic, M.; Stolz, A.; Schaefer, F.; Brenneis, C.; Ostertag, T.; Loschonsky, M.; Reindl, L.M.
Conference Paper
2012Shatter cones formed in a MEMIN impact cratering experiment
Kenkmann, T.; Poelchau, M.H.; Trullenque, G.; Hoerth, T.; Schäfer, F.; Thoma, K.; Deutsch, A.
Journal Article, Conference Paper
2012Terminal Ballistics of Flexible Micrometeoroid and Space Debris Protection Shields
Rudolph, M.; Weber, K.E.; Schäfer, F.; Destefanis, R.; Faraud, M.; Lambert, M.
Conference Paper
201111th Hypervelocity Impact Symposium 2010. Proceedings
: Schäfer, F.; Hiermaier, S.
Conference Proceedings
2011Cryogenic low-noise mHEMT-based MMIC amplifiers for 4-12 GHz band
Aja, B.; Schuster, K.; Schäfer, F.; Gallego, J.D.; Chartier, S.; Seelmann-Eggebert, M.; Kallfass, I.; Leuther, A.; Massler, H.; Schlechtweg, M.; Diez, C.; Lopez-Fernandez, I.; Lenz, S.; Türk, S.
Journal Article
2011Ejecta dynamics during hypervelocity impacts into dry and wet sandstone
Hoerth, T.; Schäfer, F.; Thoma, K.; Poelchau, M.; Kenkmann, T.; Deutsch, A.
Conference Paper
2011Electrical response of current-carrying space-grade harnesses to hypervelocity impact
Rudolph, M.; Welty, N.; Maier, C.; Putzar, R.; Schäfer, F.; Lambert, M.
Conference Paper
2011European impact test results database
Schäfer, F.; Hake, P.; Beltrami, P.; Lambert, M.
Conference Paper
2011Experimental Impact Cratering in Sandstone
Kenkmann, T.; Kowitz, A.; Wünnemann, K.; Behner, T.; Schäfer, F.; Thoma, K.; Deutsch, A.
Conference Paper
2011Fragmentation of hypervelocity aluminum projectiles on fabrics
Rudolph, M.; Schäfer, F.; Destefanis, R.; Faraud, M.; Lambert, M.
Conference Paper
2011Ground testing of hypervelocity impact effects of micrometeoroids and space debris on solar arrays
Schimmerohn, M.; Rott, M.; Gerhard, A.; Osterholz, J.; Schäfer, F.; D'Accolti, G.
Conference Paper
2011Impact cratering in sandstone: The MEMIN pilot study on the effect of pore water
Kenkmann, T.; Wünnemann, K.; Deutsch, A.; Poelchau, M.H.; Schäfer, F.; Thoma, K.
Journal Article
2011Improvements for space mission protection against space-debris
Apeldoorn, J.; Janovsky, R.; Merit, S.; Destefanis, R.; Schaefer, F.; Gelhaus, J.; Imre, E.
Conference Paper
2011Light-gas gun launcher concept for high-g proof miniature suborbital payloads
Schäfer, F.; Schimmerohn, M.; Rudolph, M.; Herbrich, S.
Conference Paper
2011A single chip broadband noise source for noise measurements at cryogenic temperatures
Bruch, D.; Schäfer, F.; Seelmann-Eggebert, M.; Aja, B.; Kallfass, I.; Leuther, A.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2010Anordnung mit selbstheilender Schutzschicht
Haase, T.; Schäfer, F.
Patent
2010Assessment of satellite equipment vulnerability to hypervelocity impacts by using the SRL ballistic limit equation
Schäfer, F.; Putzar, R.; Ryan, S.; Lambert, M.
Conference Paper
2010Fragmentation of aluminum projectiles on fabrics
Rudolph, M.; Schäfer, F.; Destefanis, R.; Faraud, M.; Lambert, M.
Conference Paper
2010Hypervelocity impact response of honeycomb sandwich panels
Schonberg, W.; Schäfer, F.; Putzar, R.
Journal Article
2010Impact sensing systems and estimated impact rates of the upcoming meteoroid and space debris detector experiment (MDD3) onboard Russian Spektr-R satellite
Schäfer, F.; Schimmerohn, M.; Babyshkin, V.; Lomakin, I.; Willemsen, P.
Conference Paper
2010Instrumentation of impact experiments using lithified rocks
Poelchau, M.H.; Hoerth, T.; Ueno, A.; Ebert, M.; Schäfer, F.; Deutsch, A.; Domke, I.; Moser, D.; Kenkmann, T.
Abstract
2010Some comments on the protection of lunar habitats against damage from meteoroid impacts
Schonberg, W.P.; Schäfer, F.; Putzar, R.
Journal Article
2010Understanding the mechanisms of hypervelocity impact induced failures on space solar arrays
Schimmerohn, M.; Osterholz, J.; Rott, M.; Gerhard, A.; Kuhnhenn, J.; Gelhaus, J.; Schäfer, F.; D'Accolti, G.
Conference Paper
2010Using light gas guns to launch sub-orbital payloads
Schimmerohn, M.; Schäfer, F.
Conference Paper
2010A versatile and cryogenic mHEMT-model including noise
Seelmann-Eggebert, M.; Schäfer, F.; Leuther, A.; Massler, H.
Conference Paper
2009Experimental space debris simulation at EMI's calibre 4 mm two-stage light gas gun
Putzar, R.; Schäfer, F.
Conference Paper
2009Impact detection onboard satellites using wireless sensor network
Schäfer, F.; Schimmerohn, M.; Meyer, H.
Conference Paper
2009Improving the significance of MM/SD risk analysis by application of the SRL ballistic limit equation
Schäfer, F.; Putzar, R.; Ryan, S.; Lambert, M.
Conference Paper
2009MDD3 - EMI's upcoming meteoroid and space debris detector experiment onboard Russian Spektr-R satellite
Schimmerohn, M.; Schäfer, F.; Lomakin, I.; Willemsen, P.
Conference Paper
2009The metamorphic HEMT and its applications in remote sensing
Kallfass, I.; Tessmann, A.; Leuther, A.; Seelmann-Eggebert, M.; Aja Abelan, B.; Gallego Puyol, J.D.; Wadefalk, N.; Schäfer, F.; Schuster, K.F.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2009Metamorphic HEMT technology for low-noise applications
Leuther, A.; Tessmann, A.; Kallfass, I.; Lösch, R.; Seelmann-Eggebert, M.; Wadefalk, N.; Schäfer, F.; Gallego Puyol, J.D.; Schlechtweg, M.; Mikulla, M.; Ambacher, O.
Conference Paper
2009The physics of shock waves and experimental shock metamorphism
Thoma, K.; Hornemann, U.; Schäfer, F.
Conference Paper, Journal Article
2009Predicting the perforation response of honeycomb sandwich panels using ballistic limit equations
Schonberg, W.P.; Schäfer, F.; Putzar, R.
Journal Article
2009Theoretical prediction of dynamic composite material properties for hypervelocity impact simulations
Ryan, S.; Wicklein, M.; Mouritz, A.; Riedel, W.; Schäfer, F.; Thoma, K.
Journal Article
2009Vulnerability of satellite equipment to hypervelocity impacts
Schäfer, F.; Putzar, R.; Lambert, M.
Conference Paper
2008Ballistic limit equation for equipment placed behind satellite structure walls
Schäfer, F.K.; Ryan, S.; Lambert, M.; Putzar, R.
Conference Paper, Journal Article
2008A ballistic limit equation for hypervelocity impacts on composite honeycomb sandwich panel satellite structures
Ryan, S.; Schäfer, F.; Destefanis, R.; Lambert, M.
Journal Article
2008Characterizing the transient response of CFRP/Al HC spacecraft structures induced by space debris impact at hypervelocity
Ryan, S.; Schäfer, F.; Guyot, M.; Hiermaier, S.; Lambert, M.
Conference Paper, Journal Article
2008Effectiveness of HC SP ballistic limit equations in predicting perforation/non-perforation response
Schonberg, W.P.; Schäfer, F.; Putzar, R.
Conference Paper
2008Sensor based real-time situation awareness of critical infrastructure
Riedel, W.; Schäfer, F.
Conference Paper
2008Structural vibrations induced by HVI - Application to the Gaia spacecraft
Vergniaud, J.B.; Guyot, M.; Lambert, M.; Schäfer, F.; Ryan, S.; Hiermaier, S.; Taylor, E.
Conference Paper, Journal Article
2008Sustainable lunar habitat protection against damage by meteoroid impacts
Schonberg, W.P.; Putzar, R.; Schäfer, F.
Conference Paper
2008Vulnerability of spacecraft harnesses to hypervelocity impacts
Putzar, R.; Schäfer, F.; Lambert, M.
Conference Paper, Journal Article
2007Impact sensor network for detection of hypervelocity impacts on spacecraft
Schäfer, F.; Janovsky, R.
Journal Article
2007Interobserver-variability of lung nodule volumetry considering different segmentation algorithms and observer training levels
Bolte, H.; Jahnke, T.; Schäfer, F.K.W.; Wenke, R.; Hoffmann, B.; Freitag-Wolf, S.; Dicken, V.; Kuhnigk, J.-M.; Lohmann, J.; Voß, S.; Knöß, N.; Heller, M.; Biederer, J.
Journal Article
2007Leichtgaskanone und Verfahren zum Beschleunigen eines festen Gegenstandes mittels einer solchen Leichtgaskanone
Schäfer, F.; Putzar, R.
Patent
2006An engineering fragmentation model for the impact of spherical projectiles on thin metallic plates
Schäfer, F.K.
Conference Paper, Journal Article
2006An excitation function for hypervelocity impact-induced wave propagation in satellite structures
Ryan, S.; Schäfer, F.; Spencer, G.; Hiermaier, S.; Guyot, M.; Lambert, M.
Conference Paper
2006Experimental and analytical study to investigate impact-induced wave propagation in spacecraft structures
Schäfer, F.; Spencer, G.; Ryan, S.; Wicklein, M.; Guyot, M.; Lambert, M.
Conference Paper
2006Experimental measurement of diaphragm deformation and bursting in a two-stage light gas gun
Putzar, R.; Spencer, G.; Schäfer, F.
Presentation
2006Impact experiments on dry and wet sandstone
Schäfer, F.; Thoma, K.; Behner, T.; Nau, S.; Kenkmann, T.; Wünnemann, K.; Deutsch, A.
Conference Paper
2006Meteoroid and space debris detector (MDD) flight experiment on the cosmos upper stage
Janovsky, R.; Schäfer, F.; Kalnins, I.; Spencer, G.
Conference Paper
2006Modified Cour-Palais/Christiansen damage equations for double-wall structures
Reimerdes, H.-G.; Nölke, D.; Schäfer, F.
Conference Paper, Journal Article
2006Numerical simulation of hypervelocity impact on CFRP/Al HC SP spacecraft structures causing penetration and fragment ejection
Ryan, S.; Schaefer, F.; Riedel, W.
Conference Paper, Journal Article
2006Selecting enhanced space debris shields for manned spacecraft
Destefanis, R.; Schäfer, F.; Lambert, M.; Faraud, M.
Conference Paper, Journal Article
2006The threat of space debris and micrometeroids to spacecraft operations
Schäfer, F.
Journal Article
2006Vulnerability of spacecraft electronics boxes to hypervelocity impacts
Putzar, R.; Schäfer, F.; Stokes, H.; Chant, R.; Lambert, M.
Conference Paper
2005Advanced shields for manned space modules
Schneider, E.; Schäfer, F.; Destefanis, R.; Lambert, M.
Conference Paper
2005Ballistic limit equation for the normal impact of unyawed ellipsoid-shaped projectiles on aluminium Whipple Shields
Schäfer, F.; Hiermaier, S.; Schneider, E.
Journal Article
2005Debris shielding development for the ATV integrated cargo carrier
Destefanis, R.; Lambert, M.; Schäfer, F.; Drolshagen, G.; Francesconi, D.
Conference Paper
2005Design and initial calibration of micrometeoroid/space debris detector (MDD)
Spencer, G.; Schäfer, F.; Tanaka, M.; Weber, M.; Putzar, R.; Janovsky, R.; Kalnins, I.
Conference Paper
2005Hypervelocity impact testing of CFRP/Al Honeycomb satellite structures
Schäfer, F.; Destefanis, R.; Ryan, S.; Riedel, W.; Lambert, M.
Conference Paper
2005Impact sensor network for detection of hypervelocity impacts on spacecraft
Schäfer, F.; Janovsky, R.
Conference Paper
2005The Inter-Agency Space Debris Coordination Committee (IADC) protection manual
Schäfer, F.; Lambert, M.; Christiansen, E.; Kibe, S.; Stokes, H.; Reimerdes, H.-G.; Meshcheryakov, S.A.; Angrilli, A.F.; Zengyao, H.
Conference Paper
2005Meteoroid and space Debris Detector (MDD) flight experiment on the Cosmos upper stage
Janovsky, R.; Schäfer, F.; Kalnins, I.; Spencer, G.
Conference Paper
2005Micrometeoroid/space debris detector (MOD) test and calibration
Spencer, G.; Schäfer, F.; Tanaka, M.; Weber, M.; Putzar, R.; Janovsky, R.; Kalnins, I.
Conference Paper
2005Space debris end-to-end service guide for spacecraft design and operation
Sdunnus, H.; Alwes, D.; Beltrami, P.; Janovsky, R.; Konpenwallner, G.; Wiedemann, C.; Reimerdes, H.G.; Schäfer, F.
Journal Article
2005Triple wall ballistic limit equation
Schäfer, F.; Putzar, R.
Conference Paper
2005Vulnerability of shielded fuel pipes and heat pipes to hypervelocity impacts
Putzar, R.; Schäfer, F.; Romberg, O.; Lambert, M.
Conference Paper
2005Vulnerability of spacecraft electronics boxes to hypervelocity impacts
Putzar, R.; Schäfer, F.; Stokes, H.; Chant, R.; Lambert, M.
Conference Paper
2004Advanced shields for manned modules
Schneider, E.; Schäfer, F.; Destefanis, R.; Lambert, M.
Conference Paper
2004An approach to achieve progress in spacecraft shielding
Thoma, K.; Schäfer, F.; Hiermaier, S.; Schneider, E.
Journal Article
2004Ballistic limit equation for the normal impact of unyawed ellipsoid-shaped projectiles on aluminium whipple shields
Schäfer, F.; Hiermaier, S.; Schneider, E.
Conference Paper
2004Ganzheitliche Instandhaltung
Bandow, G.; Schaefer, F.-W.
Book Article
2004Hochgeschwindigkeitsimpakt auf Gasdruckbehälter in Raumfahrtanwendungen
Schäfer, F.
: Thoma, K. (Prüfer)
Dissertation
2004Impact sensor network for detection of hypervelocity impacts on spacecraft
Schäfer, F.; Janovsky, R.
Conference Paper
2004Numerical study of hypervelocity space debris impacts on CFRP al honeycomb spacecraft structures
Ryan, S.; Riedel, W.; Schäfer, F.
Presentation
2004Numerical study of hypervelocity space debris impacts on CFRP/al honeycomb spacecraft structures
Ryan, S.; Riedel, W.; Schäfer, F.
Conference Paper
2004Review of ballistic limit equations for CFRP structure walls of satellites
Schäfer, F.; Schneider, E.; Lambert, M.
Conference Paper
2003Enhanced space debris shields for manned spacecraft
Destefanis, R.; Schäfer, F.; Lambert, M.; Faraud, M.; Schneider, E.
Journal Article
2003Hypervelocity impact testing of CRV nose cap and body flap configurations
Schäfer, F.; Ullmann, T.; Bickel, M.; Lambert, M.; Schneider, E.
Conference Paper
2003Radiation efficiency analysis of submillimeter-wave receivers based on a modified spectral domain integration technique
Vaupel, T.; Hansen, V.; Schäfer, F.
Journal Article
2003Simulation of ellipsoidal projectile impact on whipple shields
Hiermaier, S.J.; Schäfer, F.K.
Journal Article
2001Degradation and destruction of optical surfaces by hypervelocity impact
Schäfer, F.; Geyer, T.; Schneider, E.; Rott, M.; Igenbergs, E.
Conference Paper
2001Hypervelocity impact research - acceleration technology and applications
Schneider, E.; Schäfer, F.
Journal Article
2001Hypervelocity impacts and protection
Thoma, K.; Riedel, W.; Schäfer, F.; Hiermaier, S.
Conference Paper
2001Impact damage on sandwich panels and multi-layer insulation
Lambert, M.; Schäfer, F.; Geyer, T.
Conference Paper
2001Impact damage on shielded gas-filled vessels
Schäfer, F.; Schneider, E.; Lambert, M.
Conference Paper
2001Numerical simulation of non-perforating impacts on shielded gas-filled pressure vessels
Palmieri, D.; Schäfer, F.; Hiermaier, S.; Lambert, M.
Conference Paper
2001Shape effects in hypervelocity impact on semi-infinite metallic targets
Schäfer, F.; Herrwerth, M.; Hiermaier, S.; Schneider, E.
Conference Paper
2000Status and perspectives in protective design
Thoma, K.; Riedel, W.; Schäfer, F.; Hiermaier, S.
Journal Article
1999Behind armor blast (BAB) caused by shaped charges
Arnold, W.; Schäfer, F.K.
Journal Article
1999Hypervelocity impact fragment clouds in high-pressure gas numerical and experimental investigations
Hiermaier, S.; Schäfer, F.
Journal Article
1997An Experimental Study to Investigate Hypervelocity Impacts on Pressure Vessels
Schäfer, F.; Schneider, E.; Lambert, M.
Conference Paper
1997Hypervelocity Impact on Cylindrical Pressure Vessels - Experimental Results and Damage Classification
Schäfer, F.; Schneider, E.; Lambert, M.
Conference Paper
1997Impact fragment cloud propagation in a pressure vessel
Schäfer, F.; Schneider, E.; Lambert, M.
Journal Article
1997Propagation of Hypervelocity Impact Fragment Clouds in Pressure Gas
Schäfer, F.; Schneider, E.; Lambert, M.; Mayseless, M.
Journal Article
1992X-ray detectors based on semi-insulating GaAs substrate.
Benz, K.W.; Irsigler, R.; Ludwig, J.; Rosenzweig, J.; Runge, K.; Schäfer, F.; Schneider, J.; Webel, M.
Journal Article
1980Flexibilitaet in der Produktion
Koelle, J.H.; Schäfer, F.
Journal Article
1975Automatisierungsmoeglichkeiten beim Entgraten
Schäfer, F.
Journal Article
1974Elektochemisches Badentgraten
Schäfer, F.
Journal Article
1973Entgraten in der Fertigungstechnik. Grundlagen des Entgratens
Schäfer, F.
Journal Article
1972Maschinen und Geraete fuer die Oberflaechentechnik. Messebericht
Schäfer, F.; Wolfhard, D.
Journal Article