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The LCLS-II Gun & Buncher LLRF Controller Upgrade
Christos Bakalis, Andrew Benwell, Daron Chabot +6
LCLS-II is currently in its commissioning phase at SLAC. It is an X-ray FEL driven by a CW superconducting LINAC. The beam injector plays a crucial role in the overall performance…
Installation, Commissioning and Performance of Phase Reference Line for LCLS-II
Shreeharshini Dharanesh Murthy, Lawrence Doolittle, Charlie Xu +3
Any cavity controller for a distributed system needs a Phase Reference Line (PRL) signal from which to define phases of a cavity field measurement. The LCLS-II PRL system at SLAC p…
Analog Cavity Emulators to Support LLRF Development
Shreeharshini Dharanesh Murthy, Lawrence Doolittle, Andrew Benwell
The goal of a LLRF system is to control an actual RF cavity with beam. While digital simulations have a place, having an analog circuit to stand in for the cavity can be tremendous…
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…
LCLS-II-HE verification cryomodule high gradient performance and quench behavior
S. Posen, A. Cravatta, M. Checchin +43
An 8-cavity, 1.3 GHz, LCLS-II-HE cryomodule was assembled and tested at Fermilab to verify performance before the start of production. Its cavities were processed with a novel nitr…