Experiments on the effects of dust flux exposure on ROSETTA spacecraft materials

Details Experiments on the effects of dust flux exposure on ROSETTA spacecraft materials Experiments on the effects of dust flux exposure on ROSETTA spacecraft materials

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23.1225p&link_type=abstract

Advances in Space Research, Volume 23, Issue 7, p. 1225-1228.

Computer Science

Performance

3

Scientific paper

During its comet rendezvous, the ROSETTA/ROLAND spacecraft will be exposed to a particle flux which is caused by the sublimation of volatile cometary material. The dust flux will be characterized by particle velocities of a few 100 m s-1 and particle sizes between 0.5 and 100 μm. The dust flux exposure requires the investigation of possible effects on spacecraft and scientific payload performance. It is of interest whether (1) the particles stick to the spacecraft and thereby form dust layers, (2) the particles cause erosive damage upon impact on sensitive parts, and (3) the impacts electrically charge the spacecraft. Furthermore, it will be possible to better decode dust flux characteristics from spacecraft data (e.g. internal temperatures, spacecraft charging) if the effects on the space probe are more intensively investigated. We present work of an ESA-funded pre-study which showed that an experimental method which consists of generating a dust jet in vacuum and of optically observing individual grain-target collisions is applicable for this purpose, and we point out design features of the future ``Cometary Dust Flux Simulation Facility''.

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