We present a technique to achieve low-velocity to intermediate-velocity collisions between fragile dust aggregates in the laboratory. For this purpose, two vacuum drop-tower setups have been developed that allow collision velocities between <0.01 and ~10 m/sec. The collision events are recorded by high-speed imaging.
Blum, J., Beitz, E., Bukhari, M., Gundlach, B., Hagemann, J., Heißelmann, D., Kothe, S., Schräpler, R., von Borstel, I., Weidling, R. Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System. J. Vis. Exp. (88), e51541, doi:10.3791/51541 (2014).