8 citations · 21 across the 7 of their papers we have counts for
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Results of R&D Programmes and LP&CW EXFEL Cryomodule Tests in the Period from 2005 to 2023
J. Sekutowicz, D. Proch, J. Eschke +14
In 2005 and 2006, we began to consider the feasibility of long-pulse (LP) and continuous-wave (CW) operation for the E-XFEL. The operation modes considered were assumed to be compl…
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…
RF Test Results from Cryomodule 1 at the Fermilab SRF Beam Test Facility
E. Harms, K. Carlson, B. Chase +22
Powered operation of Cryomodule 1 (CM-1) at the Fermilab SRF Beam Test Facility began in late 2010. Since then a series of tests first on the eight individual cavities and then the…
A vector control and data acquisition system for the multicavity LLRF system for cryomodule1 at Fermilab
P. Varghese, B. Chase, B. Barnes +4
A LLRF control and data acquisition system for the 8-cavity cryomodule1 at the ILCTA has been implemented using three 33-channel ADC boards in a VXI mainframe. One card each is ded…
First high power pulsed tests of a dressed 325 MHz superconducting single spoke resonator at Fermilab
R. Madrak, J. Branlard, B. Chase +18
In the recently commissioned superconducting RF cavity test facility at Fermilab (SCTF), a 325 MHz, β=0.22 superconducting single-spoke resonator (SSR1) has been tested for the fir…