Poster

PUBDB-2025-05718

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Twin-bunch modelling in linear accelerators for plasma wakefield acceleration

Long, T. (Corresponding author)XFEL.EU*DESY* ; Boulton, L. A.Extern*DESY* ; Chen, Y. L.DESY* ; Decking, W.XFEL.EU*DESY* ; Scholz, M.DESY* ; Björklund Svensson, J. H.Extern*DESY* ; Wesch, S.DESY* ; Wood, J. C.DESY*

2025

Abstract: Twin electron bunches accelerated by high-energy linacs are attracting increasing interest especially in twin free-electron laser (FEL) pulse generation andbeam-driven plasma wakefield acceleration (PWFA) studies. High-energy linacs may benefit from plasma accelerators, where a trailing bunch is accelerated inGV/m fields in a plasma wave driven by the leading bunch. This could facilitate high-energy physics, as well as greatly increase the available photon energyrange of existing FELs without increasing the footprint. Here, initial analytical studies of twin-bunch generation in FLASH accelerator are carried out. With theinitial beam longitudinal phase space properly tuned by temporally shaping the photocathode laser, together with optimizing linac settings, high-quality twinelectron bunches with tunable delay and simultaneous bunch shaping can be generated, which is essential for energy-efficient PWFA with low energy spread.

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Contributing Institute(s):

1. FTX Fachgruppe AST (HH_FH_FTX_AS)
2. Plasma Acceleration and Laser Group (MPL)
3. Koordination des XFEL-Beschleunigers (MXL)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 6G13 - Accelerator of European XFEL (POF4-6G13) (POF4-6G13)

Experiment(s):

1. FLASHForward
2. Experiments at XFEL

Appears in the scientific report 2025

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