7–11 Sept 2025
Teaching Hub 502
Europe/London timezone

Single-shot detection of short electron bunch shapes at MHz repetition rates using diversity electro-optic scheme with advanced reconstruction algorithms at EuXFEL and FLASH

WEPMO13
10 Sept 2025, 16:00
2h
Mountford Hall, Liverpool Guild of Students

Mountford Hall, Liverpool Guild of Students

Liverpool Guild of Students, University of Liverpool
Poster Presentation MC05: Longitudinal Diagnostics and Synchronization Wednesday Poster Session

Speaker

Quentin Demazeux (Université de Lille)

Description

To surpass limitations in sub-picosecond electro-optic electron bunch length diagnostics[1], we present an innovative detection method utilizing diversity schemes[2].

This approach employs simultaneous multi-output measurements of the chirped optical probe modulated by the electron bunch's field. We introduce a novel inversion algorithm that automatically recognizes and compensates for imperfections in the probe laser spectrum and chirp, enabling high-fidelity retrieval of bunch shapes, particularly for broadband THz radiation over a long temporal window.

Numerical simulations and initial experimental results demonstrate the system's potential for advanced, real-time bunch shape monitors at FLASH and EuXFEL, and can be extended to THz CTR or FEL based THz sources.

[1] F. Sun, Z. Jiang, and X.-C. Zhang, Appl. Phys. Lett. 3, 2233 (1998)
[2] E. Roussel et al., Light: Science & Applications 11, 14 (2022)

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Author

Quentin Demazeux (Université de Lille)

Co-authors

Christophe Szwaj (Université de Lille) Eléonore Roussel (Université de Lille) Bernd Steffen (Deutsches Elektronen-Synchrotron DESY) Marie Kristin Czwalinna (Deutsches Elektronen-Synchrotron DESY) Serge Bielawski (Université de Lille)

Presentation materials

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