Effets de l’irradiation par des ions lourds multichargés sur des cristaux et des glaces d’intérêt astrophysique

Abstract : The solar system and the interstellar medium are permanently exposed to radiations such as solar wind and cosmic rays. The interaction between energetic particles and astrophysical materials (ices, silicates and carbon-based materials) plays an important role in several astrophysical phenomena. Laboratory experiments correlated to observational data may allow a better understanding of these phenomena. The aim of this thesis was to study the effect of slow and fast heavy ions on lithium fluoride and on astrophysical materials such as ices and silicates. We focused on the sputtering phenomenon. The present study was performed with a time of flight imaging technique (XY-TOF-SIMS) at the CIMAP-GANIL laboratory. The major fraction of secondary ions is found to be emitted in the form of clusters. Several parameters affect sputtering: the stopping power regime, the thickness of the target, the incident angle and, for low highly charged ions, the projectile charge. Our laboratory simulations exhibit the possibility that sputtered particles contribute to the formation of Mercury’s and Jupiter’s moons exospheres.
Complete list of metadatas

Cited literature [72 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01098780
Contributor : Thomas Langlinay <>
Submitted on : Monday, December 29, 2014 - 2:29:23 PM
Last modification on : Tuesday, February 5, 2019 - 12:12:30 PM
Long-term archiving on : Monday, March 30, 2015 - 10:10:50 AM

Identifiers

  • HAL Id : tel-01098780, version 1

Citation

Thomas Langlinay. Effets de l’irradiation par des ions lourds multichargés sur des cristaux et des glaces d’intérêt astrophysique. Physique [physics]. Université de Caen, 2014. Français. ⟨tel-01098780⟩

Share

Metrics

Record views

497

Files downloads

627