Comparison of the Genesis solar wind regime algorithm results with solar wind composition observed by ACE

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Launched on 8 August 2001, the NASA Genesis mission is now collecting samples of the solar wind in various materials, and will return those samples to Earth in 2004 for analysis. A primary science goal of Genesis is the determination of the isotopic and elemental composition of the solar atmosphere from the solar wind material returned. In particular, Genesis will provide measurements of those species that are not provided by solar and in situ observations. We know from in situ measurements that the solar wind exhibits compositional variations across different types of solar wind flows. Therefore, Genesis exposes different collectors ... continued below

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6 p.

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Reisenfeld, D. B. (Daniel B.); Steinberg, J. T (John T.); Barraclough, B. L. (Bruce L.); Dors, E. E. (Eric E.); Weins, R. C. (Roger C.); Neugebauer, Marcia et al. January 1, 2002.

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Launched on 8 August 2001, the NASA Genesis mission is now collecting samples of the solar wind in various materials, and will return those samples to Earth in 2004 for analysis. A primary science goal of Genesis is the determination of the isotopic and elemental composition of the solar atmosphere from the solar wind material returned. In particular, Genesis will provide measurements of those species that are not provided by solar and in situ observations. We know from in situ measurements that the solar wind exhibits compositional variations across different types of solar wind flows. Therefore, Genesis exposes different collectors to solar wind originating from three flow types: coronal hole, coronal mass ejection (CME), and interstream flows. Flow types are identified using in situ measurements of solar wind protons, alphas, and electrons from electrostatic analyzers carried by Genesis. The flow regime selection algorithm and subsequent collector deployment on Genesis act autonomously. We present an assessment of composition variations of O, He, and Mg ions observed by ACE/SWICS concurrent with Genesis observations, and compare these to the Genesis algorithm decisions. Not only does this serve as a test of the algorithm, the compilation of composition vs. regime will be important for comparison to the abundances determined from sample analysis at the end of the mission.

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6 p.

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  • Submitted to: Solar Wind 10 Conference Proceedings

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  • Report No.: LA-UR-02-4900
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976247
  • Archival Resource Key: ark:/67531/metadc926010

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  • January 1, 2002

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:02 p.m.

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Reisenfeld, D. B. (Daniel B.); Steinberg, J. T (John T.); Barraclough, B. L. (Bruce L.); Dors, E. E. (Eric E.); Weins, R. C. (Roger C.); Neugebauer, Marcia et al. Comparison of the Genesis solar wind regime algorithm results with solar wind composition observed by ACE, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc926010/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.