Heber, V. S. and Wiens, R. C. and Reisenfeld, D. B. and Allton, J. H. and Baur, H. and Burnett, D. S. and Olinger, C. T. and Wiechert, U. and Wieler, R. (2007) The Genesis Solar Wind Concentrator Target: Mass Fractionation Characterised by Neon Isotopes. Space Science Reviews, 130 (1-4). pp. 309-316. ISSN 0038-6308 http://resolver.caltech.edu/CaltechAUTHORS:20130215-090220551
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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.|
|Subject Keywords:||solar wind; noble gases; genesis oxygen isotopic analysis; UV laser ablation|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||19 Feb 2013 23:56|
|Last Modified:||19 Feb 2013 23:56|
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