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Time dependence of the helium flux measured by pamela
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2017 (English)In: Proceedings of Science, Sissa Medialab Srl , 2017Conference paper, Published paper (Refereed)
Abstract [en]

The last solar cycle has presented a peculiarly long quiet phase with consequent minimum modulation conditions for cosmic rays. The proton and electron spectra were measured from July 2006 to December 2009 by PAMELA experiment, providing fundamental information about the transport and modulation of cosmic rays inside the heliosphere. These studies allow to obtain a more complete description of the cosmic radiation. In this picture the time dependence of the helium spectrum become very important to constrain parameters of the actual solar modulation model. The crucial point for this analysis is the selection of a dataset of helium events which ensure high statistics with a very low contamination. In this paper the definition of the selection criteria for helium events with data taken from July 2006 to June 2014 by PAMELA experiment is reported. 

Place, publisher, year, edition, pages
Sissa Medialab Srl , 2017.
Keywords [en]
Cosmic rays, Cosmology, Helium, Modulation, Solar energy, Electron spectrum, Heliospheres, Helium flux, Helium spectrum, Selection criteria, Solar cycle, Solar modulation, Time dependence, High energy physics
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-236838Scopus ID: 2-s2.0-85051497918OAI: oai:DiVA.org:kth-236838DiVA, id: diva2:1273730
Conference
2017 European Physical Society Conference on High Energy Physics, EPS-HEP 2017, 5 July 2017 through 12 July 2017
Note

QC 20181221

Available from: 2018-12-21 Created: 2018-12-21 Last updated: 2018-12-21Bibliographically approved

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Carlson, PerPearce, Mark

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