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@INPROCEEDINGS{Demazeux:640176,
author = {Demazeux, Quentin and Szwaj, Christophe and Roussel,
Eléonore and Steffen, Bernd and Czwalinna, Marie Kristin
and Bielawski, Serge},
title = {{S}ingle-shot detection of short electron bunch shapes at
{MH}z repetition rates using diversity electro-optic scheme
with advanced reconstruction algorithms at {E}u{XFEL} and
{FLASH}},
address = {Geneva},
publisher = {JACoW Publishing},
reportid = {PUBDB-2025-04726},
isbn = {978-3-95450-262-2},
pages = {746 - 748},
year = {2026},
comment = {The Fourteenth International Beam Instrumentation
Conference : Liverpool, UK, 7-11 September 2025 : full
proceedings},
booktitle = {The Fourteenth International Beam
Instrumentation Conference : Liverpool,
UK, 7-11 September 2025 : full
proceedings},
abstract = {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)},
month = {Sep},
date = {2025-09-07},
organization = {14th International Beam
Instrumentation Conference, Liverpool
(UK), 7 Sep 2025 - 11 Sep 2025},
keywords = {Accelerator Physics (Other) / MC05 - MC05: Longitudinal
Diagnostics and Synchronization (Other)},
cin = {MSK},
cid = {I:(DE-H253)MSK-20120731},
pnm = {621 - Accelerator Research and Development (POF4-621)},
pid = {G:(DE-HGF)POF4-621},
experiment = {EXP:(DE-H253)FLASH(machine)-20150101 /
EXP:(DE-H253)XFEL(machine)-20150101},
typ = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
doi = {10.18429/JACoW-IBIC2025-WEPMO13},
url = {https://bib-pubdb1.desy.de/record/640176},
}