NASA Technical Reports Server NTRS 20150000191: The Formation of Solid Particles from their Gas-Phase Molecular Precursors in Cosmic Environments with NASA Ames COSmIC FacilityReportar como inadecuado



 NASA Technical Reports Server NTRS 20150000191: The Formation of Solid Particles from their Gas-Phase Molecular Precursors in Cosmic Environments with NASA Ames COSmIC Facility


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We present and discuss the unique characteristics and capabilities of the laboratory facility, COSmIC, that was developed at NASA Ames to generate, process and analyze interstellar, circumstellar and planetary analogs in the laboratory. COSmIC stands for Cosmic Simulation Chamber and is dedicated to the study of molecules and ions under the low temperature and high vacuum conditions that are required to simulate interstellar, circumstellar and planetary physical environments in space. COSmIC integrates a variety of state-of-the-art instruments that allow forming, processing and monitoring simulated space conditions for planetary, circumstellar and interstellar materials in the laboratory. COSmIC is composed of a Pulsed Discharge Nozzle PDN expansion that generates a free jet supersonic expansion coupled to two ultrahigh-sensitivity, complementary in situ diagnostics: a Cavity Ring Down Spectroscopy CRDS system for photonic detection and a Reflectron Time-Of-Flight Mass Spectrometer ReTOF-MS for mass detection. Recent, unique, laboratory astrophysics results that were obtained using the capabilities of COSmIC will be discussed, in particular the progress that have been achieved in monitoring in the laboratory the formation of solid gains from their gas-phase molecular precursors in environments as varied as stellar-circumstellar outflow and planetary atmospheres. Plans for future, next generation, laboratory experiments on cosmic molecules and grains in the growing field of laboratory astrophysics will also be addressed as well as the implications of these studies for current and upcoming space missions.



Autor: NASA Technical Reports Server (NTRS)

Fuente: https://archive.org/







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