@article{EckhardtRutlohStumpeetal.1998, author = {Eckhardt, Th. and Rutloh, M. and Stumpe, Joachim and Kr{\"u}ger, Harald}, title = {Photo-Induced "Command Effects" in LC polymers by the combination of photoorientation and thermotropic self- organization}, year = {1998}, language = {en} } @article{KruegerKrivovGruen2000, author = {Kr{\"u}ger, Harald and Krivov, Alexander V. and Gr{\"u}n, Eberhard}, title = {A dust cloud around Ganymede Maintained by hypervelocity impacts of interplanetary micrometeoroids}, issn = {0032-0633}, year = {2000}, language = {en} } @article{KrivovKruegerGruenetal.2002, author = {Krivov, Alexander V. and Kr{\"u}ger, Harald and Gr{\"u}n, Eberhard and Thiessenhusen, Kai-Uwe and Hamilton, Douglas P.}, title = {A tenuous dust ring of Jupiter formed by escaping ejecta from the Galilean satellites}, issn = {0148-0227}, year = {2002}, language = {en} } @article{ThiessenhusenKrivovKruegeretal.2002, author = {Thiessenhusen, Kai-Uwe and Krivov, Alexander V. and Kr{\"u}ger, Harald and Gr{\"u}n, Eberhard}, title = {A dust cloud around Pluto and Charon}, issn = {0032-0633}, year = {2002}, language = {en} } @article{FruebingKruegerGoeringetal.2002, author = {Fr{\"u}bing, Peter and Kr{\"u}ger, Harald and Goering, H. and Gerhard, Reimund}, title = {Relaxation behaviour of thermoplastic polyurethanes with covalently attached nitroaniline dipoles}, year = {2002}, language = {en} } @article{KirvovWardinskiSpahnetal.2002, author = {Kirvov, Alexander V. and Wardinski, Ingo and Spahn, Frank and Kr{\"u}ger, Harald and Gr{\"u}n, Eberhard}, title = {Dust on the outskirts of the Jovian System}, year = {2002}, language = {en} } @article{SramaAhrensAltobellietal.2004, author = {Srama, Ralf and Ahrens, Thomas J. and Altobelli, Nicolas and Auer, S. and Bradley, J. G. and Burton, M. and Dikarev, V. V. and Economou, T. and Fechtig, Hugo and G{\"o}rlich, M. and Grande, M. and Graps, Amara and Gr{\"u}n, Eberhard and Havnes, Ove and Helfert, Stefan and Horanyi, Mihaly and Igenbergs, E. and Jessberger, Elmar K. and Johnson, T. V. and Kempf, Sascha and Krivov, Alexander v. and Kr{\"u}ger, Harald and Mocker-Ahlreep, Anna and Moragas-Klostermeyer, Georg and Lamy, Philippe and Landgraf, Markus and Linkert, Dietmar and Linkert, G. and Lura, F. and McDonnell, J. A. M. and Moehlmann, Dirk and Morfill, Gregory E. and Muller, M. and Roy, M. and Schafer, G. and Schlotzhauer, G. and Schwehm, Gerhard H. and Spahn, Frank and St{\"u}big, M. and Svestka, Jiri and Tschernjawski, V}, title = {The Cassini Cosmic Dust Analyzer}, issn = {0038-6308}, year = {2004}, abstract = {The Cassini-Huygens Cosmic Dust Analyzer (CDA) is intended to provide direct observations of dust grains with masses between 10(-19) and 10(-9) kg in interplanetary space and in the jovian and saturnian systems, to investigate their physical, chemical and dynamical properties as functions of the distances to the Sun, to Jupiter and to Saturn and its satellites and rings, to study their interaction with the saturnian rings, satellites and magnetosphere. Chemical composition of interplanetary meteoroids will be compared with asteroidal and cometary dust, as well as with Saturn dust, ejecta from rings and satellites. Ring and satellites phenomena which might be effects of meteoroid impacts will be compared with the interplanetary dust environment. Electrical charges of particulate matter in the magnetosphere and its consequences will be studied, e.g. the effects of the ambient plasma and the magnetic held on the trajectories of dust particles as well as fragmentation of particles due to electrostatic disruption. The investigation will be performed with an instrument that measures the mass, composition, electric charge, speed, and flight direction of individual dust particles. It is a highly reliable and versatile instrument with a mass sensitivity 106 times higher than that of the Pioneer 10 and I I dust detectors which measured dust in the saturnian system. The Cosmic Dust Analyzer has significant inheritance from former space instrumentation developed for the VEGA, Giotto, Galileo, and Ulysses missions. It will reliably measure impacts from as low as I impact per month up to 104 impacts per second. The instrument weighs 17 kg and consumes 12 W, the integrated time-of-flight mass spectrometer has a mass resolution of up to 50. The nominal data transmission rate is 524 bits/s and varies between 50 and 4192 bps}, language = {en} } @article{SremcevicKrivovKruegeretal.2005, author = {Sremcevic, Miodrag and Krivov, Alexander V. and Kr{\"u}ger, Harald and Spahn, Frank}, title = {Impact-generated dust clouds around planetary satellites : model versus Galileo}, issn = {0032-0633}, year = {2005}, abstract = {This paper focuses on tenuous dust clouds of Jupiter's Galilean moons Europa, Ganymede and Callisto. In a companion paper (Sremcevic et al., Planet. Space Sci. 51 (2003) 455-471) an analytical model of impact-generated ejecta dust clouds surrounding planetary satellites has been developed. The main aim of the model is to predict the asymmetries in the dust clouds which may arise from the orbital motion of the parent body through a field of impactors. The Galileo dust detector data from flybys at Europa, Ganymede and Callisto are compatible with the model, assuming projectiles to be interplanetary micrometeoroids. The analysis of the data suggests that two interplanetary impactor populations are most likely the source of the measured dust clouds: impactors with isotropically distributed velocities and micrometeoroids in retrograde orbits. Other impactor populations, namely those originating in the Jovian system, or interplanetary projectiles with low orbital eccentricities and inclinations, or interstellar stream particles, can be ruled out by the statistical analysis of the data. The data analysis also suggests that the mean ejecta velocity angle to the normal at the satellite surface is around 30°, which is in agreement with laboratory studies of the hypervelocity impacts. © 2004 Elsevier Ltd. All rights reserved}, language = {en} }