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An overview of the cosmic dust analogue material production in reduced gravity: the STARDUST experience.

The formation, properties and chemical dynamics of microparticles are important in a wide variety of technical and scientific fields including synthesis of semiconductor crystals from the vapour, heterogeneous chemistry in the stratosphere and the formation of cosmic dust surrounding the stars. Gravitational effects on particle formation from vapors include gas convection and buoyancy and particle sedimentation. These processes can be significantly reduced by studying condensation and agglomeration of particles in microgravity. In addition, to accurately simulate particle formation near stars, which takes place under low gravity conditions, studies in microgravity are desired. We report here the STARDUST experience, a recent collaborative effort that brings together a successful American program of microgravity experiments on particle formation aboard NASA KC-135 Reduced Gravity Research Aircraft and several Italian research groups with expertise in microgravity research and astrophysical dust formation. The program goal is to study the formation and properties of high temperature particles and gases that are of interest in astrophysics and planetary science. To do so we are developing techniques that are generally applicable to study particle formation and properties, taking advantage of the microgravity environment to allow accurate control of system parameters.[1]

References

  1. An overview of the cosmic dust analogue material production in reduced gravity: the STARDUST experience. Ferguson, F., Lilleleht, L.U., Nuth, J., Stephens, J.R., Bussoletti, E., Colangeli, L., Mennella, V., Dell'Aversana, P., Mirra, C. Microgravity quarterly : MGQ. (1993) [Pubmed]
 
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