Status of the L-band gun development at PITZ

Oppelt, Anne; Brinker, F.; Amirkhanyan, Z.; Aftab, N.; Zeeshan, S.; Köhler, W.; Li, Xiangkun; Philipp, S.; Richard, C. R.; Müller, Fabian Simon; Jeromin, A.; Riemer, Felix; Bousonville, M.; Vashchenko, Grygorii; Lipka, D.; Jachmann, L.; Martens, Cornelius; Lotfi, Zahra; Gross, M.; Boonpornprasert, P.; Ermakov, Alexey; Good, J. D.; Schaper, L.; Kalantaryan, D.; Dmytriiev, D.; Vilcins-Czvitkovits, S.; Grebinyk, A.; Krasilnikov, M.; Bazyl, D.; Hoffmann, Andreas; Stephan, F.

Poster

PUBDB-2024-05648

Status of the L-band gun development at PITZ

Oppelt, A. (Corresponding author)DESY* ; Aftab, N.DESY* ; Amirkhanyan, Z.Extern*DESY* ; Boonpornprasert, P.DESY* ; Dmytriiev, D.DESY* ; Good, J. D.DESY* ; Grebinyk, A.DESY* ; Gross, M.DESY* ; Hoffmann, A.XFEL.EU*DESY* ; Jachmann, L.DESY* ; Kalantaryan, D.DESY* ; Köhler, W.DESY* ; Krasilnikov, M.DESY* ; Li, X.DESY* ; Lotfi, Z.DESY* ; Müller, F. S.Extern*DESY* ; Philipp, S.DESY* ; Richard, C. R.DESY* ; Riemer, F.DESY* ; Stephan, F.DESY* ; Vashchenko, G.DESY* ; Zeeshan, S.DESY* ; Schaper, L.Extern*DESY* ; Bazyl, D.DESY* ; Bousonville, M.DESY* ; Brinker, F.DESY* ; Ermakov, A.DESY* ; Jeromin, A.DESY* ; Lipka, D.DESY* ; Martens, C.Extern*DESY* ; Vilcins-Czvitkovits, S.DESY*

2024

32nd Linear Accelerator Conference, LINAC2024, Chicago, DESY, USA, 25 Aug 2024 - 30 Aug 2024

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 Testfacility 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 alsoequipped 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 witha 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 themanufacturing 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.

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