7 citations · 12 across the 3 of their papers we have counts for
8 papers
Update on the LLRF operations status at the European XFEL
M. Diomede, V. Ayvazyan, J. Branlard +7
The European XFEL (EuXFEL) is a free-electron laser in the X-ray range for users. Its high availability is one of the key aspects of the machine. In 2022, it entered in the sixth y…
Narrow bandwidth active noise control for microphonics rejection in superconducting cavities at LCLS-II
Andrea Bellandi, Julien Branlard, Jorge Diaz Cruz +9
LCLS-II is an X-Ray Free Electron Laser (XFEL) commissioned in 2022, being the first Continuous Wave (CW) hard XFEL in the world to come into operation. To accelerate the electron…
RF regulation with superconducting cavities and beam operation using a frequency shifted cavity
Sven Pfeiffer, Valeri Ayvazyan, Julien Branlard +11
The free-electron laser FLASH at DESY and the European XFEL are operated with superconducting radio frequency cavities and supply beam to several user experiments. The switching ti…
Piezo control for XFEL
Mariusz Grecki, Henning Weddig, Julien Branlard +4
The superconducting cavities operated at high Q level need to be precisely tuned to the RF frequency. Well tuned cavities assure the good field stability and require a minimum leve…
Simulation of microphonic effects in high TESLA cavities during CW operations
A. Bellandi, W. Cichalewski, J. Branlard +4
This document describes a new package to compute high performance simulations of a module of superconducting accelerating cavities from the LLRF controller perspective. The reason…
Analysis of multibunch free electron laser operation
Thorsten Hellert, Winfried Decking, Julien Branlard
At the SASE-FEL user facilities FLASH and European XFEL, superconducting TESLA type cavities are used for acceleration of the driving electron bunches. The high achievable duty cyc…