Bulk niobium is the most common material used in the fabrication of rf superconducting
cavities for accelerators. Predicting and reducing the rf surface dissipation in these cavity …

Foreword from author; When I joined the CEA Saclay SRF group in 1989, my initial
background was physical chemistry and surface science, which I completed later on with …

Calculations based on second‐order Moller–Plesset and density functional theory (DFT)
methods using different exchange and correlation functionals are performed on C2H4Nb …

A series of small fine-grained and single-crystal bars, with strain from 0%(recrystallized) to
50%, were given different amounts of chemical polishing. Four-point resistivity (ρ) data was …

Bulk niobium is the material mostly used in RF superconducting cavities for accelerator.
Predicting and reducing the surface dissipation in RF is mandatory, since it has a …

Improvement of the cavity performance by a hightemperature heat-treatment without
subsequent chemical etching has been reported for large-grain Nb cavities treated by …

• On se réfèrera au texte détaillé qui suit le résumé (dans la version complète du mémoire)
pour les références bibliographiques. Pour chaque thème nous avons extrait ici un ou deux …

Particle accelerators are used by scientists in order to discover properties of matter at sub
microscopic scales. Particles are accelerated in resonators (cavities). Superconductivity …