TY  - CONF
AU  - Ayvazyan, Valeri
AU  - Branlard, Julien
AU  - Christou, Chris
AU  - Honkavaara, Katja
AU  - Katalev, Valery
AU  - Kostin, Denis
AU  - Rönsch-Schulenburg, Juliane
AU  - Schaper, Lucas
AU  - Schmidt, Christian
AU  - Wiencek, Mateusz
AU  - Varol, Burcu
TI  - Reaching design electron energy at FLASH after linac upgrade
CY  - CERN Geneva
PB  - JACoW Publishing
M1  - PUBDB-2025-00418
SN  - 	978-3-95450-219-6
SP  - 328 - 330
PY  - 2024
N1  - Literaturangaben;
AB  - The FLASH 2020+ project at DESY includes, among other modernizations, an increase of the electron beam energy. Two accelerator modules were replaced and the RF distribution of other modules was optimized. The limiting factors such as cavity breakdown and field emission were identified and measured through dedicated studies. At a later stage, based on these measurements, adjustments to the high-power distribution were proposed and the optimal operating point was demonstrated to achieve the design electron energy of 1.35 GeV with the nominal RF pulse length at FEL lasing conditions. After proper optimization and tuning of the low-level RF parameters, the linac successfully operated at maximum energy and delivered FEL radiation in the wavelength range below 3.2 nm. The measurement results as well as the achieved cavity gradients with energy gains are presented.
T2  - 32nd Linear Accelerator Conference
CY  - 25 Aug 2024 - 30 Aug 2024, Chicago (USA)
Y2  - 25 Aug 2024 - 30 Aug 2024
M2  - Chicago, USA
KW  - Accelerator Physics (Other)
KW  - mc4-technology - MC4: Technology (Other)
KW  - MC4.4 - MC4.4 Low level RF (Other)
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.18429/JACOW-LINAC2024-TUPB003
UR  - https://bib-pubdb1.desy.de/record/622607
ER  -