A5024323424- Spacecraft Design and Technology
- Radiation Effects in Electronics
- High voltage insulation and dielectric phenomena
- Plasma Diagnostics and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Metal and Thin Film Mechanics
- Advanced Battery Technologies Research
- Lightning and Electromagnetic Phenomena
- Quantum, superfluid, helium dynamics
- Plasma Applications and Diagnostics
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Physics and Applications
- Ionosphere and magnetosphere dynamics
- Atomic and Subatomic Physics Research
- Atmospheric Ozone and Climate
Office National d'Études et de Recherches Aérospatiales
2017-2022
Université de Toulouse
2019
Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO)
2017
In this paper, the development of a 1-D physical and numerical model is presented for description charge transport ionization processes irradiated space used polymers (Teflon FEP Kapton HN). This extends previous circuit described by Hanna et al. relies on solid-state physics. aims at predicting charging behavior dielectric materials under radiation conditions. A validation carried out through crossed comparisons with experimental data surface potentials, conductivity bulk distribution. For...
This paper focuses on the study of internal charging four space used polymers: polyetheretherketone, fluorinated ethylene propylene, polyimide films, and epoxy based material (Epoxy FR4). Experiments were carried out for each using GEODUR facility (Toulouse, ONERA) that mimics geostationary environment behind shielding. Two different irradiation currents have been applied: 1 pA/cm2 10 pA/cm2. is to analyze behavior intrinsic electrical properties polymer. influence high electric field levels...
In this paper, the development of a 1D physical conductivity model that describes charge transport in dielectric materials under space radiations with application to Kapton-HN is discussed. This allows good description charging behavior materials. Former experiment run at ONERA on showed temperature and electric field dependent. These results confirmed need implementing these dependences our model. paper focuses dependence. After thorough analysis literature, several theories have been found...
The objective of the European Space Agency validation internal charging tools using realistic electron environmental facility (REEF) project is to assess performance against experimental measurements made at REEF University Surrey. uses an intense strontium-90 beta-emitting radioactive source simulate space environment. This complemented by parallel experiments derive material parameters, conducted ONERA. We report results from with four different types dielectric and compare these...
The electron emission yield (EEY) is defined as the ratio between total number of emitted electrons and incident electrons. knowledge EEY required in many applications dealing with plasma-wall interactions trigging discharge: hall thruster technology, multipactor discharge, space radiation induced electric charging, etc.
The increase in temperature leads to an of the vibrations material's lattice and thus a greater probability electron-phonon interaction. Therefore, principle, it is expected that decrease electron emission yield (TEY). However, metals, most main energy loss processes electron-electron anticipated TEY metals be significantly insensitive between -150°C 200°C. Despite this well-established assertion, effect on still being intensively discussed multipactor community.