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| Titel |
The measurements of light high-energy ions in NINA-2 experiment |
| VerfasserIn |
A. Leonov, M. Cyamukungu, J. Cabrera, P. Leleux, Gh. Grégoire, S. Benck, V. Mikhailov, A. Bakaldin, A. Galper, S. Koldashov, S. Voronov, M. Casolino, M. P. Pascale, P. Picozza, R. Sparvoli, M. Ricci |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 25, no. 9 ; Nr. 25, no. 9 (2007-10-02), S.2029-2036 |
| Datensatznummer |
250015917
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| Publikation (Nr.) |
 copernicus.org/angeo-25-2029-2007.pdf |
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| Zusammenfassung |
The flux of energetic light ions at low altitude is both an important input
and output for self-consistent calculations of albedo particles resulting
from the interaction of trapped and cosmic ray particles, with the upper
atmosphere. In addition, data on the flux of light ions are needed to
evaluate radiation damages on space-borne instruments and on space mission
crews. In spite of that, sources of data on the flux of energetic ions at LEO
are roughly limited to the AP-8 model, CREME/CREME96 codes and the SAMPEX,
NOAA/TIROS satellites. The existing and operational European SAC-C/ICARE and
PROBA-1/SREM instruments could also be potential sources for proton data at
LEO. Although AP-8 and SAMPEX/PSB97 may be publicly accessed through the
SPENVIS, they exhibit an order of magnitude difference in low altitude
proton fluxes and they do not contain helium fluxes. Therefore, improved
light ion radiation models are still needed.
In this paper we present a procedure to identify and measure the energy of
ions that are not stopped in the NINA-2 instrument. Moreover, problems
related to particles that cross the instrument in the opposite direction are
addressed and shown to be a possible cause of particle misidentification.
Measuring fluxes of low abundance elements like energetic helium ions
requires a good characterisation of all possible sources of backgrounds in
the detector. Hints to determine the several contributions to the background are
presented herein and may be applied to extract an order of magnitude of
energetic ions fluxes from existing data sets, while waiting for dedicated
high performance instruments. |
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