25–30 Aug 2024
Hilton Chicago
America/Chicago timezone

Reaching design electron energy at FLASH after linac upgrade

TUPB003
27 Aug 2024, 16:00
2h
Boulevard (Hilton Chicago)

Boulevard

Hilton Chicago

720 South Michigan Ave Chicago, IL 60605 USA
Poster Presentation MC4.4 Low level RF Tuesday Poster Session

Speaker

Julien Branlard (Deutsches Elektronen-Synchrotron DESY)

Description

The FLASH 2020+ project at DESY includes, among other modernizations, an upgrade of the electron beam energy. Two accelerator modules were replaced and the RF distribution of the other modules was optimized. The limiting factors such as cavity quenching and field emissions are identified and measured at acceleration modules. At a later stage, based on those measurements, a high-power distribution adjustment scheme was proposed and the optimal operating point was demonstrated to achieve the design 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 SASE-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.

Author

Valeri Ayvazyan (Deutsches Elektronen-Synchrotron DESY)

Co-authors

Julien Branlard (Deutsches Elektronen-Synchrotron DESY) Chris Christou (Deutsches Elektronen-Synchrotron DESY) Katja Honkavaara (Deutsches Elektronen-Synchrotron DESY) Valery Katalev (Deutsches Elektronen-Synchrotron DESY) Denis Kostin (Deutsches Elektronen-Synchrotron DESY) Juliane Roensch-Schulenburg (Deutsches Elektronen-Synchrotron DESY) Lucas Schaper (Deutsches Elektronen-Synchrotron DESY) Christian Schmidt (Deutsches Elektronen-Synchrotron DESY) Dr Siegfried Schreiber (Deutsches Elektronen-Synchrotron DESY) Mateusz Wiencek (Deutsches Elektronen-Synchrotron DESY) Burcu Yildirim (Deutsches Elektronen-Synchrotron DESY)

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