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 …

Superconducting radiofrequency (SRF) cavities are vital components of particle accelerators
nowadays. In order to minimise the energy dissipation, a perfect inner surface of the cavity …

Recent coordination of thermometry with optical images has shown that obvious defects at
specific locations produce heat or even quench superconducting radio-frequency (SRF) …

A simplified numerical model has been developed to simulate nonlinear superconducting
radiofrequency (SRF) losses on Nb surfaces. This study focuses exclusively on excessive …

Niobium superconducting cavity performances are limited by the quench magnetic field of
niobium. Maximum achievable accelerating field is estimated by simulation during the …

Much work has shown that the topography of the interior surface is an important contributor
to the performance of Nb superconducting radiofrequency (SRF) accelerator cavities. Micron …

To develop cavity inspection and repair techniques is important for quality control of the
superconducting rf cavity to get more better yield for high accelerating gradient. A high …

This tutorial presents in the first part the requirement for the surface preparation of RF
Niobium cavities and its justification in term s of physical origin of limitation (eg cleanliness …

It has been demonstrated recentiy that locał magnetic field enhancement can originate from
roughness (eg steps at grain boundaries)|| 1||. We are willing to investigate if the quench şite …

In this work, we have investigated two series of Nb/Cu samples deposited by HiPIMS
technique, and differing in Nb deposition conditions, Nb film thickness and Cu substrate …