FEL2026 - 42nd International Free Electron Laser Conference

Session

Electron Diagnostics, Timing, Synchronization, and Controls (Invited)

THY

27 Aug 2026, 10:30

179. Transverse Electron Beam Size Diagnostics Based on Synchrotron Radiation (THY01)

Andrei Trebushinin (European X-Ray Free-Electron Laser)

27/08/2026, 10:30

Session 10: Electron Diagnostics, Timing, Synchronization, and Controls

Invited Oral Presentation

We report the observation of transverse intensity fluctuations (spikes) in synchrotron radiation from a single undulator cell at the European XFEL after monochromatization [1]. Autocorrelation analysis of the recorded events confirms that these fluctuations originate from the partial transverse coherence of the radiation. By calculating the second-order autocorrelation function, we determined...

24. Absolute characterization of sub-femtosecond electron bunches in SwissFEL using a Bunch-Compressor-Monitor (THY02)

Gian Luca Orlandi (Paul Scherrer Institute)

27/08/2026, 11:00

Session 10: Electron Diagnostics, Timing, Synchronization, and Controls

Invited Oral Presentation

Monitoring the electron pulse duration is crucial for setting up and stabilizing the lasing in a linac-driven Free-Electron-Laser (FEL). Bunch-Compressor-Monitors (BCMs) allow for a non-invasive - albeit uncalibrated – monitoring of the electron pulse duration at the exit of a magnetic chicane by detecting and fully integrating the radiation energy emitted by the electron beam around the...