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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/gi-2017-1
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
24 Feb 2017
Review status
A revision of this discussion paper was accepted for the journal Geoscientific Instrumentation, Methods and Data Systems (GI) and is expected to appear here in due course.
TARANIS XGRE and IDEE Detection Capability of Terrestrial Gamma-Ray Flashes and Associated Electron Beams
David Sarria1, Francois Lebrun1,2, Pierre-Louis Blelly3,4, Remi Chipaux5, Philippe Laurent1,2, Jean-Andre Sauvaud3,4, Pierre Devoto3,4, Damien Pailot1, Jean-Pierre Baronick1, and Miles Lindsey-Clark1 1APC, AstroParticule et Cosmologie, Universite Paris Diderot, CNRS/IN2P3, CEA/DRF/IRFU, Observatoire de Paris, Sorbonne Paris Cite, 10 rue Alice Domont et Leonie Duquet, 75205 Paris Cedex 13, France
2CEA/DRF/IRFU/Sap, Bat. 709, Orme des Merisiers, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France
3Universite de Toulouse, UPS-OMP, IRAP, Toulouse, France
4CNRS, IRAP, 9 Av. colonel Roche, Toulouse, France
5CEA/DRF/IRFU/SEDI, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France
Abstract. 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 high counting capability (about 10 million counts per second), 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 these 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.


Citation: Sarria, D., Lebrun, F., Blelly, P.-L., Chipaux, R., Laurent, P., Sauvaud, J.-A., Devoto, P., Pailot, D., Baronick, J.-P., and Lindsey-Clark, M.: TARANIS XGRE and IDEE Detection Capability of Terrestrial Gamma-Ray Flashes and Associated Electron Beams, Geosci. Instrum. Method. Data Syst. Discuss., https://doi.org/10.5194/gi-2017-1, in review, 2017.
David Sarria et al.
David Sarria et al.

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Short summary
The TARANIS spacecraft will be launched at the end of 2018. It is one of the first missions dedicated to the study of Terrestrial Gamma-Ray Flashes (TGF). These phenomena are very short, and linked to thunderstorms. In this study we present two of the six instruments on-board the TARANIS spacecraft, dedicated to gamma-rays (XGRE) and energetic electrons (IDEE). We compare them to other instruments that have already detected TGF, and use it to estimate the detection rate we will have for TARANIS.
The TARANIS spacecraft will be launched at the end of 2018. It is one of the first missions...
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