tests of the electrical particle trap (ICAPS-MSG)

abstract

In order to understand the first stages of planetary formation it is necessary to better understand the physics of dust. Experimentally the conditions of a protoplanetary dust disk can be described by a dust cloud embedded in a thin gas. To study the properties of the particles and the agglomerates in particular it is necessary to observe such dust cloud for an extended period of time. As no experimental facility is completely without residual, external forces (such as residual gravity, thermophoresis due to thermal gradients,...) it is necessary to trap particles against these external forces in order to study the long-term (>1min) behaviour of dense aerosols.

• J. Steinbach, J. Blum, M. Krause, Development of an Optical Trap for Microparticle Clouds in Dilute Gases, Eur. Phys. J. E 15, 287-291, 2004.

• J. Blum, Dust Agglomeration, Advances in Physics 55, Nos. 7-8, 881-947, 2006.

• J. Blum, S. Bruns, D. Rademacher, A. Voss, B. Willenberg, M. Krause, Measurement of the translational and rotational Brownian motion of individual particles in a rarefied gas in the transition region between ballistic and diffusive motion, Phys. Rev. Lett. 97, 230601, 2006.

• D. Langkowski. J. Teiser, J. Blum, The Physics of Protoplanetesimal Dust Agglomerates II. Low Velocity Collision Properties, Astrophys. J. 675, 764-776, 2008.

• J. Blum, R. Schräpler, T. Poppe, G. Borst, Handling of Particulate Solids on the International Space Station, Granular Matter 10, 323-328, 2008.

• J. Blum, G. Wurm, The Growth Mechanisms of Macroscopic Bodies in Protoplanetary Disks, Annual Review of Astronomy and Astrophysics 46, 21-56, 2008.

• R. Weidling, C. Güttler, J. Blum, F. Brauer, The Physics of Protoplanetesimal Dust Agglomerates. III. Compaction in Multiple Collisions, Astrophys. J. 696, 2036-2043, 2009.

• P. Hofmeister, J. Blum, D. Heißelmann, The flow of granular matter under reduced-gravity conditions, in: Powders & Grains 2009: Proceedings of the 6th International Conference on Micromechanics of Granular Media, Hrsg.: M. Nakagawa & S. Luding, AIP Conference Proceedings Volume 1145, 71-74, 2009.

• D. Heißelmann, J. Blum, K. Wolling, Laboratory studies of ice-particle collisions in Satur′s dense rings, in: Powders & Grains 2009: Proceedings of the 6th International Conference on Micromechanics of Granular Media, Hrsg.: M. Nakagawa & S. Luding, AIP Conference Proceedings Volume 1145, 785-787, 2009.

• D. M. Salter, D. Heißelmann, G. Chaparro, G. van der Wolk, P. Reißaus, E. de Kuyper, P. Tuijn, R.W. Dawson, M. Hutcheon, G. Drinkwater, B. Stoll, K. Gebauer, F. J. Molster, H. Linnartz, G. Borst, H. J. Fraser, J. Blum, A Zero-Gravity Instrument to Study Low Velocity Collisions of Fragile Particles at Low Temperatures, Rev. Sci. Instrum. 80, 074501, 2009.

• Heißelmann, D., Blum, J., Fraser, H. J., Wolling, K., 2009. Microgravity experiments on the collisional behavior of Saturnian ring particles, Icarus 206, 424–430, 2010.

experiment year: 2005
number of drops: 15

experiment year: 2004
number of drops: 15