Mathematics – Logic
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997arcn.rept..399s&link_type=abstract
Analysis of Returned Comet Nucleus Samples, Proceedings of a Workshop held at Milpitas, California, 16-18 January, 1989. Compil
Mathematics
Logic
Samples, Comet Nuclei, Sampling, Chemical Analysis, Comets, Test Facilities, Rosetta Mission, Textures, Composition (Property), Laboratories, Mineralogy, Temperature Effects, Models
Scientific paper
One of the fundamental requirements of the planned ESA/NASA Comet Nucleus Sample Return Mission (ROSETTA) is to develop concepts and instrumentations for the curation and analysis of the returned samples in an adequately equipped Receiving Laboratory. This laboratory must meet the condition that the handling, inspection, and analysis of the samples be performed at the temperature and pressure of the parental comet nucleus environment. This restriction must hold for the complete period of what may be called 'Primary Sample Examination and Analysis' (PSEA). Only after this period subsamples may be released to less restrictive environments. As foreseen in the 'Sampling and sample storage requirements" of the ROSETTA mission definition report, different types of samples will be returned in sealed containers at a temperature of less than 160 K, preferably at 130 K. The total sample mass is expected to be near 15 kg. This sampling plan which includes a 1-3 m long core sample provides a first set of boundary conditions of a Receiving Laboratory. A second set of limiting conditions has to be derived from a "best estimate model" of the mineralogical composition and texture of the returned samples. It is the aim of this article to help defining (a) the objectives of a Primary Sample Examination and Analysis, (b) the properties of best estimate cometary model samples, and (c) the requirements and instrumentation for PSEA with special emphasis on microscopic bulk analysis of the samples.
Düren H.
Knölker J.
Stäffler Dieter
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