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| Titel |
Background subtraction for the Cluster/CODIF plasma ion mass spectrometer |
| VerfasserIn |
C. G. Mouikis, L. M. Kistler, G. Wang, Y. Liu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2193-0856
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 3, no. 1 ; Nr. 3, no. 1 (2014-04-16), S.41-48 |
| Datensatznummer |
250115211
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| Publikation (Nr.) |
 copernicus.org/gi-3-41-2014.pdf |
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| Zusammenfassung |
| The CODIF instrument on the Cluster spacecraft is a time-of-flight (TOF) ion
mass spectrometer. Although TOF spectrometers are relatively immune to
background contamination due to the inherent double coincidence requirement,
high background rates can still result in false coincidences. Along the
Cluster orbit, false coincidences are commonly observed due to the
penetrating radiation of relativistic electrons during the encounters with
the Earth's radiation belts. A second type of background in these instruments
occurs when events of one species fall into the time-of-flight range defined
for another species. Although the fraction of the H+ events that spill
into the He+ measurement is small, when the actual He+ fluxes are
low this can result in significant contamination. In this paper we present
two techniques that allow the subtraction of the false coincidences and the
H+ "spill" from the CODIF measurements. |
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