TUAA012

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URL	https://doi.org/10.18429/JACoW-LINAC2024-TUAA012
Title	Status of the L-band gun development at PITZ
Authors	A. Oppelt, A. Hoffmann, C. Richard, D. Dmytriiev, F. Riemer, F. Stephan, F. Mueller, J. Good, L. Jachmann, M. Gross, M. Krasilnikov, N. Aftab, P. Boonpornprasert, S. Philipp, S. Zeeshan, W. Koehler, X. Li, Z. Lotfi, D. Kalantaryan, Z. Amirkhanyan Deutsches Elektronen-Synchrotron DESY at Zeuthen C. Martens, D. Bazyl, F. Brinker, G. Vashchenko, L. Schaper, D. Lipka, S. Vilcins, M. Bousonville, A. Ermakov Deutsches Elektronen-Synchrotron X. Zhang Tsinghua University in Beijing A. Grebinyk Technische Hochschule Wildau A. Jeromin DESY Nanolab
Abstract	Gun5, the new generation of high-gradient normal conducting 1.3 GHz RF guns for linac driven free-electron lasers like FLASH and European XFEL is under development at the Photo Injector Test facility at DESY in Zeuthen (PITZ). Its improved cell geometry and cooling concept allow for RF pulse durations of up to 1 ms at 10 Hz repetition rate, at gradients of ~60 MV/m at the cathode. Gun5 is also equipped with an RF probe for measurements of the RF field inside the gun. The first gun of this type, Gun5.1, is in operation at PITZ since April 2022. Gun5.2 will be commissioned at the FALCO conditioning facility at DESY in Hamburg, starting in June 2024. This gun is equipped with a balanced (symmetric) RF waveguide feed to the coaxial power coupler to prevent a coupler kick and thus improve the beam quality delivered by the electron source. Further guns are currently in the manufacturing process. In parallel, studies towards a more reliable cathode spring design are ongoing, in order to overcome observed issues during the high duty cycle operation of Gun5.1. This article will give an overview on all those developments.
Paper	download: TUAA012.pdf
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Conference	32nd Linear Accelerator Conference (LINAC2024)
Series
Location	Chicago, IL, USA
Date	25-30 Aug 2024
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Kelly Jaje (ANL), Kip Bishofberger (LANL), Ryan Brody (ANL), Gustavo Bruno (ANL), Jan Chrin (PSI), Cathy Eyberger (ANL), Maggie Montes (SLAC), Denise Skiadopoulos (ANL), Ling Wang (MSU/FRIB), Kent Wootton (ANL)
Online ISBN	978-3-95450-219-6
Online ISSN	2226-0366
Received	16 August 2024
Revised	28 August 2024
Accepted	28 August 2024
Issued	23 October 2024
DOI	10.18429/JACoW-LINAC2024-TUAA012
Pages	317-319
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