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Title: Solar and solar-wind composition results from the genesis mission

Abstract

The Genesis mission returned samples of solar wind to Earth in September, 2004 for ground-based analyses of solar-wind composition, particularly for isotope ratios. Substrates, consisting mostly of high-purity semiconductor materials, were exposed to the solar wind at L1 from December 2001 to April 2004. In addition to a bulk sample of the solar wind, separate samples of coronal hole, interstream, and coronal mass ejection material were obtained. While many of the substrates were broken upon landing due to the failure to deploy the parachute, a number of results have been obtained, and most of the primary science objectives will likely be met. These include noble gas (He, Ne, Ar, Kr, and Xe) isotope ratios in the bulk solar wind and in different solarwind regimes, and the nitrogen and oxygen isotope ( 18O/ 17O/ 16O) ratios to high precision. The greatest successes to date have been with the noble gases. Light noble gases from bulk solar wind and separate solar-wind regime samples have been analyzed to date. The regime compositions are so far ambiguous on the occurrence of the type of isotopic fractionation expected from Coulomb drag acceleration. Neon results from closed system stepped etching of bulk metallic glass have revealedmore » the nature of isotopic fractionation as a function of depth, which in lunar samples have for years deceptively suggested the presence of a separate solar component. Isotope ratios of the heavy noble gases, nitrogen, and oxygen are still in the process of being measured.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Geological and Planetary Sciences, Pasadena, CA (United States)
  3. Washington Univ., St. Louis, MO (United States)
  4. Isotope Geology, Zurich (Switzerland)
  5. Univ. of Montana, Missoula, MT (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1211591
Report Number(s):
LA-UR-07-1091
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Wiens, Roger C., Burnett, D. S., Hohenberg, C. M., Meshik, A., Heber, V., Grimberg, A., Wieler, R., and Reisenfeld, D. B. Solar and solar-wind composition results from the genesis mission. United States: N. p., 2007. Web. doi:10.2172/1211591.
Wiens, Roger C., Burnett, D. S., Hohenberg, C. M., Meshik, A., Heber, V., Grimberg, A., Wieler, R., & Reisenfeld, D. B. Solar and solar-wind composition results from the genesis mission. United States. doi:10.2172/1211591.
Wiens, Roger C., Burnett, D. S., Hohenberg, C. M., Meshik, A., Heber, V., Grimberg, A., Wieler, R., and Reisenfeld, D. B. Tue . "Solar and solar-wind composition results from the genesis mission". United States. doi:10.2172/1211591. https://www.osti.gov/servlets/purl/1211591.
@article{osti_1211591,
title = {Solar and solar-wind composition results from the genesis mission},
author = {Wiens, Roger C. and Burnett, D. S. and Hohenberg, C. M. and Meshik, A. and Heber, V. and Grimberg, A. and Wieler, R. and Reisenfeld, D. B.},
abstractNote = {The Genesis mission returned samples of solar wind to Earth in September, 2004 for ground-based analyses of solar-wind composition, particularly for isotope ratios. Substrates, consisting mostly of high-purity semiconductor materials, were exposed to the solar wind at L1 from December 2001 to April 2004. In addition to a bulk sample of the solar wind, separate samples of coronal hole, interstream, and coronal mass ejection material were obtained. While many of the substrates were broken upon landing due to the failure to deploy the parachute, a number of results have been obtained, and most of the primary science objectives will likely be met. These include noble gas (He, Ne, Ar, Kr, and Xe) isotope ratios in the bulk solar wind and in different solarwind regimes, and the nitrogen and oxygen isotope ( 18O/17O/16O) ratios to high precision. The greatest successes to date have been with the noble gases. Light noble gases from bulk solar wind and separate solar-wind regime samples have been analyzed to date. The regime compositions are so far ambiguous on the occurrence of the type of isotopic fractionation expected from Coulomb drag acceleration. Neon results from closed system stepped etching of bulk metallic glass have revealed the nature of isotopic fractionation as a function of depth, which in lunar samples have for years deceptively suggested the presence of a separate solar component. Isotope ratios of the heavy noble gases, nitrogen, and oxygen are still in the process of being measured.},
doi = {10.2172/1211591},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 20 00:00:00 EST 2007},
month = {Tue Feb 20 00:00:00 EST 2007}
}

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