2-color pump probe optical delay line

WEO03
17 Sept 2025, 11:00
20m
The Loop

The Loop

Lund, Sweden
Contributed Oral Presentation Optics Beamlines Session 3

Speaker

Marc Planas Carbonell (European X-Ray Free-Electron Laser)

Description

The SASE3 soft X-Ray beamline at the European XFEL is equipped with a magnetic chicane allowing two-color X-ray pump probe experiments. This chicane splits the undulator area in two, the first part generates photons with a specific wavelength, then the electron beam is delayed with respect to the produced photons and lasers in the second section at another wavelength. The Optical Delay Line (ODL) installed along the photon path will increase the variety of experiments achievable. The ODL consists in four flat mirrors mounted in a vertical chicane geometry creating a fix delay to the photons produced and allows, in combination with the variable magnetic chicane, the two pulses to be crossed with negative or zero-time delay. The device adjustments need a motion resolution down to tens of nanometer and very high stability due to the long distance to the experiment (≃520m). All mechanics are mounted in UHV and particle free conditions and comply to the electron accelerator specifications. The ODL project is a collaborative effort of European XFEL and FMB Berlin GmbH. In this contribution, the conceptual design, final design, mechanical challenges and the first tests are described.

Author

Marc Planas Carbonell (European X-Ray Free-Electron Laser)

Co-authors

Andreas Koch (European X-Ray Free-Electron Laser) Benoit Rio (European X-Ray Free-Electron Laser) Christian Schröter (FMB Feinwerk- und Messtechnik (Germany)) Daniele La Civita (European X-Ray Free-Electron Laser) Fan Yang (European X-Ray Free-Electron Laser) Hanjo Ryll (FMB Feinwerk- und Messtechnik (Germany)) Harald Sinn (European X-Ray Free-Electron Laser) Karsten Blümer (FMB Feinwerk- und Messtechnik (Germany)) Lukas Müller (Deutsches Elektronen-Synchrotron DESY) Marziyeh Tavakkoly (European X-Ray Free-Electron Laser) Maurizio Vannoni (European X-Ray Free-Electron Laser) Michael Meyer (European X-Ray Free-Electron Laser) Torsten Wohlenberg (Deutsches Elektronen-Synchrotron DESY)

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