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First detection of geomagnetically trapped antiprotons by the PAMELA experiment
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2011 (English)In: Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011, Institute of High Energy Physics , 2011, Vol. 6, 86-89 p.Conference paper, Published paper (Refereed)
Abstract [en]

We present the measurement of geomagnetically trapped antiprotons in the South Atlantic Anomaly performed by the PAMELA satellite-bourne experiment. The existence of an antiproton radiation belt, predicted by several models as the product of cosmic ray interactions with the residual terrestrial atmosphere, is evidenced for the first time. PAMELA measured the antiproton spectrum in the kinetic energy range between 60 and 750 MeV, reporting a trapped antiproton flux which exceeds by about 3 orders of magnitude the interplanetary cosmic ray antiproton flux. An estimation of the mean under-cutoff antiproton flux outside radiation belts has been also provided.

Place, publisher, year, edition, pages
Institute of High Energy Physics , 2011. Vol. 6, 86-89 p.
Keyword [en]
Cosmic rays, Magnetosphere, Radiation belt, SAA, Trapped antiprotons
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-165156DOI: 10.7529/ICRC2011/V06/1029Scopus ID: 2-s2.0-84899514295OAI: oai:DiVA.org:kth-165156DiVA: diva2:807604
Conference
32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China, 11 August 2011 through 18 August 2011
Note

QC 20150423

Available from: 2015-04-24 Created: 2015-04-23 Last updated: 2017-05-22Bibliographically approved

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Pearce, Mark

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