Genesis Solar Wind Concentrator: Computer Simulations of Performance Under Solar Wind Conditions

Details Genesis Solar Wind Concentrator: Computer Simulations of Performance Under Solar Wind Conditions Genesis Solar Wind Concentrator: Computer Simulations of Performance Under Solar Wind Conditions

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ssrv..105..601w&link_type=abstract

Space Science Reviews, v. 105, Issue 3, p. 601-626 (2003).

Computer Science

16

Scientific paper

The design and operation of the Genesis Solar-Wind Concentrator relies heavily on computer simulations. The computer model is described here, as well as the solar wind conditions used as simulation inputs, including oxygen charge state, velocity, thermal, and angular distributions. The simulation included effects such as ion backscattering losses, which also affect the mass fractionation of the instrument. Calculations were performed for oxygen, the principal element of interest, as well as for H and He. Ion fluences and oxygen mass fractionation are determined as a function of radius on the target. The results were used to verify that the instrument was indeed meeting its requirements, and will help prepare for distribution of the target samples upon return of the instrument to earth. The actual instrumental fractionation will be determined at that time by comparing solar-wind neon isotope ratios measured in passive collectors with neon in the Concentrator target, and by using a model similar to the one described here to extrapolate the instrumental fractionation to oxygen isotopes.

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