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Helium from Coronal Mass Ejecta Collected by NASA’s Genesis

Yurimoto, H. and Tonotani, A. and Bajo, K. and Olinger, C. T. and Reisenfeld, D. and Jurewicz, A. J. G. and Itose, S. and Sakaguchi, I. and Ishihara, M. and Uchino, K. and Burnett, D. S. (2017) Helium from Coronal Mass Ejecta Collected by NASA’s Genesis. Meteoritics and Planetary Science, 52 (S1). p. 401. ISSN 1086-9379. https://resolver.caltech.edu/CaltechAUTHORS:20170707-100238763

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Abstract

The energy distribution of solar wind (SW) is an indicator of solar activity. The implantation profiles of SW particles in a solid material directly irradiated by the SW echo that energy distribution. Accordingly, the depth distribution of a SW element in a SW collector tells us about the solar activity during the time of collection. Helium is the second most abundant element of SW and almost free from terrestrial contamination, so it is one of the best candidates for measuring a detailed implantation profile. But, analysis of SW He by conventional depth-profiling methods have either extremely low He ionization yields or require extremely large sample volumes. Using the secondary neutral mass spectrometer, LIMAS, at Hokkaido University [1], we previously measured a SW He implantation profile from a bulk solar wind collector from the NASA Genesis SW sample return mission [2]. However, only the shape of the low-speed and high-speed SW He contributions were observed at that time, because the SW He component from coronal mass ejections (CMEs) was below our detection limit. Here we report our new, more sensitive measurements, which show CME flows collected by Genesis in the bulk solar wind collector.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/maps.12934DOIArticle
http://onlinelibrary.wiley.com/doi/10.1111/maps.12934/abstractPublisherArticle
Additional Information:© 2017 The Meteoritical Society. First published: 6 July 2017.
Issue or Number:S1
Record Number:CaltechAUTHORS:20170707-100238763
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170707-100238763
Official Citation:(2017), 80th Annual Meeting of the Meteoritical Society (2017). Meteorit Planet Sci, 52: A1–A408. doi:10.1111/maps.12934
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78842
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Jul 2017 17:15
Last Modified:03 Oct 2019 18:12

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