Synchronized beamline at FLASH2 based on high-order harmonic generation for two-color dynamics studies

verfasst von
E. Appi, C. C. Papadopoulou, J. L. Mapa, C. Jusko, P. Mosel, A. Schoenberg, J. Stock, T. Feigl, S. Ališauskas, T. Lang, C. M. Heyl, B. Manschwetus, M. Brachmanski, M. Braune, H. Lindenblatt, F. Trost, S. Meister, P. Schoch, A. Trabattoni, F. Calegari, R. Treusch, R. Moshammer, I. Hartl, U. Morgner, M. Kovacev
Abstract

We present the design, integration, and operation of the novel vacuum ultraviolet (VUV) beamline installed at the free-electron laser (FEL) FLASH. The VUV source is based on high-order harmonic generation (HHG) in gas and is driven by an optical laser system synchronized with the timing structure of the FEL. Ultrashort pulses in the spectral range from 10 to 40 eV are coupled with the FEL in the beamline FL26, which features a reaction microscope (REMI) permanent endstation for time-resolved studies of ultrafast dynamics in atomic and molecular targets. The connection of the high-pressure gas HHG source to the ultra-high vacuum FEL beamline requires a compact and reliable system, able to encounter the challenging vacuum requirements and coupling conditions. First commissioning results show the successful operation of the beamline, reaching a VUV focused beam size of about 20 μm at the REMI endstation. Proof-of-principle photo-electron momentum measurements in argon indicate the source capabilities for future two-color pump-probe experiments.

Organisationseinheit(en)
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
QuantumFrontiers
Institut für Quantenoptik
Externe Organisation(en)
Deutsches Elektronen-Synchrotron (DESY)
Carl Zeiss SMT AG
Helmholtz-Institut Jena
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Max-Planck-Institut für Kernphysik
Ruprecht-Karls-Universität Heidelberg
Universität Hamburg
optiX fab GmbH
Typ
Artikel
Journal
Review of scientific instruments
Band
92
ISSN
0034-6748
Publikationsdatum
16.12.2021
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Instrumentierung
Elektronische Version(en)
https://doi.org/10.1063/5.0063225 (Zugang: Offen)