Profil de David Sarria
Email : david.sarriaSPAMFILTER@irap.omp.eu
Téléphone / phone: 0561556677
Bureau / office : 151
Institution : CNES
Statut / status: Doctorant
2012-... : Doctorant à l'IRAP
2011-2012 : Master 2 Recherche, Astrophysique Sciences de l'Espace et Planétologie
Université Paul Sabatier
2010-2011 : M1 Astrophysique et Techniques Spatiales, Université Paul Sabatier
2009-2010 : Licence 3 Physique Fondamentale, Université Paul Sabatier
2008-2009 : Licence 2 Physique, Université Paul Sabatier
2007-2008 : Licence 1 Informatique Math Physique, Université Paul Sabatier
Juin 2007 : Bac S mention bien, spécialité Mathématiques.
On-board TARANIS satellite, the CNES mission dedicated to the study of Transient Luminous Events (TLEs) and Terrestrial Gamma-ray Flashes (TGFs), IDEE and XGRE are the two instruments which will measure the relativistic electrons and X and gamma rays. At the altitude of the satellite, the fluxes have been significantly altered by the filtering of the atmosphere and the satellite only measures a subset of the particles. Therefore, the inverse problem, to get an information on the sources and on the mechanisms responsible for these emissions, is rather tough to tackle, especially if we want to take advantage of the other instruments which will provide indirect information on those particles. The only reasonable way to solve this problem is to embed in the data processing, a theoretical approach using a numerical model of the generation and the transport of these burst emissions.
For this purpose, we developed a numerical Monte Carlo (MC) model which solves the transport of both relativistic electrons/positrons and gamma-rays, traveling through the atmosphere and the geomagnetic field. After a brief presentation of the model and the validation by comparison with GEANT4, we discuss the origin of the particles escaping the atmosphere and how they may be spatially and temporarily dispersed as a function of their energy and radial distance at the altitude of the satellite, depending on the source properties, and the impact that could have on the detection by the satellite.