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| Titel |
TARANIS XGRE and IDEE Detection Capability of Terrestrial Gamma-Ray Flashes and Associated Electron Beams |
| VerfasserIn |
David Sarria, Francois Lebrun, Pierre-Louis Blelly, Philippe Laurent |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250139980
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| Publikation (Nr.) |
 EGU/EGU2017-3304.pdf |
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| Zusammenfassung |
| With a launch expected in 2018, the TARANIS micro-satellite is dedicated to the study of
transient phenomena observed in association with thunderstorms. On-board the
spacecraft, XGRE and IDEE are two instruments dedicated to study Terrestrial
Gamma-ray Flashes (TGFs) and associated electron beams (TEBs). XGRE can detect
electrons (energy range: 1 MeV to 10 MeV) and X/gamma-rays (energy range:
20 keV to 10 MeV), with a very low instrumental dead time, and the ability to
discriminate one type of particle from the other. The IDEE instrument is focused on
electrons in the 80 keV to 4 MeV energy range, with the ability to estimate their pitch
angles.
Monte-Carlo simulations of the TARANIS instruments, using a preliminary model of the
spacecraft, allow sensitive area estimates for both instruments. It leads to an averaged
effective area of 425 cm2 for XGRE to detect X/gamma rays from TGFs, and the
combination of XGRE and IDEE gives an average effective area of 255 cm2 to detect
electrons/positrons from TEBs. We then compare these performances to RHESSI, AGILE,
and Fermi GBM, using performances extracted from literature for the TGF case,
and with the help of Monte-Carlo simulations of their mass models for the TEB
case.
Combining this data with with the help of the MC-PEPTITA Monte-Carlo simulations of
TGF propagation in the atmosphere, we build a self-consistent model of the TGF
and TEB detection rates of RHESSI, AGILE, and Fermi. It can then be used to
estimate that TARANIS should detect about 225 TGFs/year and 25 TEBs/year. |
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