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PUBDB-2024-08002

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards short-pulse generation at FLASH via laser-assisted electron bunch manipulation

Amstutz, P. (Corresponding author)Extern* ; Khan, S.Extern* ; Mai ; Akcaalan, O.DESY* ; Behrens, C.DESY* ; Gerth, C.DESY* ; Goetzke, G. I. C.DESY* ; Große-Wortmann, U.DESY* ; Mahnke, C.DESY* ; Schneidmiller, E. A.XFEL.EU*DESY* ; Tiedtke, K.XFEL.EU*DESY*

2024
JACoW Publishing Geneva, Switzerland
ISBN: 978-3-95450-247-9

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Please use a persistent id in citations: doi:10.18429/JACoW-IPAC2024-MOPG65  doi:10.3204/PUBDB-2024-08002

Abstract: The FLARE project aims to investigate special operation modes of the laser heater at the free-electron laser FLASH in Hamburg that enable the generation of few- or possibly sub-femtosecond soft X-ray pulses. To this end, laser pulses of the laser heater are split and then recombined after one pulse has been delayed. By controlling the interference of both pulses via their temporal overlap, a longitudinally non- uniform heating of the electron bunches can be achieved. Utilizing this, two short-pulse generation schemes are to be implemented as part of the FLARE project. In the first scheme, the energy spread of the bunch is increased to a degree that inhibits lasing, leaving only a small unheated region which emits a short FEL pulse. The second scheme works by imprinting an energy modulation with a linearly increasing amplitude onto the longitudinal phase-space dis- tribution of the bunch. In subsequent magnetic chicanes, this phase-space structure results in a localized compression of the bunch, creating an extremely short current spike, which might be used to produce an X-ray pulse on the same time scale. The FLARE setup as well as first experimental results are presented.

Keyword(s): Accelerator Physics ; mc2-photon-sources-and-electron-accelerators - MC2: Photon Sources and Electron Accelerators ; MC2.A06 - MC2.A06 Free Electron Lasers

Note: Literaturangaben;

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Contributing Institute(s):

1. Beschleunigerphysik (MPY)
2. Laser Forschung und Entwicklung (FS-LA)
3. FLASH Photonen-Diagnose und Steuerungen (FS-FLASH-D)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 05K22PE1 - Laser-induzierte Formung von Elektronenpaketen am Freie-Elektronen-Laser FLASH (BMBF-05K22PE1) (BMBF-05K22PE1)

Experiment(s):

1. Facility (machine) FLASH

Appears in the scientific report 2024

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