The Genesis Solar Wind Concentrator Target: Mass Fractionation Characterised by Neon Isotopes
Abstract
The concentrator on Genesis provided samples of increased fluences of solar wind ions for precise determination of the oxygen isotopic composition. The concentration process caused mass fractionation as a function of the radial target position. This fractionation was measured using Ne released by UV laser ablation and compared with modelled Ne data, obtained from ion-trajectory simulations. Measured data show that the concentrator performed as expected and indicate a radially symmetric concentration process. Measured concentration factors are up to ∼30 at the target centre. The total range of isotopic fractionation along the target radius is 3.8%/amu, with monotonically decreasing ^(20)Ne/^(22)Ne towards the centre, which differs from model predictions. We discuss potential reasons and propose future attempts to overcome these disagreements.
Additional Information
© 2007 Springer Science+Business Media, Inc. Received: 22 December 2006; Accepted: 26 March 2007; Published online: 15 May 2007. We acknowledge the financial support by the Swiss National Science Foundation. We thank for the support by the NASA Discovery Mission Office.Additional details
- Eprint ID
- 36941
- Resolver ID
- CaltechAUTHORS:20130215-090220551
- Swiss National Science Foundation (SNSF)
- NASA Discovery Mission Office
- Created
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2013-02-19Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences