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000622607 1001_ $$0P:(DE-H253)PIP1005222$$aAyvazyan, Valeri$$b0$$eCorresponding author
000622607 1112_ $$a32nd Linear Accelerator Conference$$cChicago$$d2024-08-25 - 2024-08-30$$gLINAC2024$$wUSA
000622607 245__ $$aReaching design electron energy at FLASH after linac upgrade
000622607 260__ $$aCERN Geneva$$bJACoW Publishing$$c2024
000622607 29510 $$a[Ebook] LINAC2024, Chicago, August 25-30, 2024 : proceedings of the 32nd Linear Accelerator Conference (LINAC2024 / Jaje, Kelly , [Geneva] : JACoW Publishing, [2024],
000622607 300__ $$a328 - 330
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000622607 520__ $$aThe 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.
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000622607 650_7 $$2Other$$amc4-technology - MC4: Technology
000622607 650_7 $$2Other$$aMC4.4 - MC4.4 Low level RF
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000622607 7001_ $$0P:(DE-H253)PIP1014945$$aBranlard, Julien$$b1
000622607 7001_ $$0P:(DE-H253)PIP1106853$$aChristou, Chris$$b2
000622607 7001_ $$0P:(DE-H253)PIP1002393$$aHonkavaara, Katja$$b3
000622607 7001_ $$0P:(DE-H253)PIP1002270$$aKatalev, Valery$$b4
000622607 7001_ $$0P:(DE-H253)PIP1002197$$aKostin, Denis$$b5
000622607 7001_ $$0P:(DE-H253)PIP1004087$$aRönsch-Schulenburg, Juliane$$b6
000622607 7001_ $$0P:(DE-H253)PIP1015071$$aSchaper, Lucas$$b7
000622607 7001_ $$0P:(DE-H253)PIP1005968$$aSchmidt, Christian$$b8
000622607 7001_ $$0P:(DE-H253)PIP1013197$$aWiencek, Mateusz$$b9
000622607 7001_ $$0P:(DE-H253)PIP1020525$$aVarol, Burcu$$b10
000622607 773__ $$a10.18429/JACOW-LINAC2024-TUPB003
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