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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 4: X-Ray Lasers
K 4.3: Vortrag
Mittwoch, 22. März 2023, 11:30–11:45, HSZ/0403
Mechanical design and implementation of high-resolution electron time-of-flight spectrometers for angular atreaking — •Lasse Wülfing1, Sara Savio1, Niclas Wieland1, Lars Funke1, Arne Held1, Markus Ilchen2, and Wolfram Helml1 — 1Fakultät Physik, Technische Universität Dortmund, Germany — 2Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
In order to reconstruct the stochastic temporal shapes of SASE FEL pulses in a non-destructive manner, a specialized angular streaking chamber is built at DESY and XFEL. Angular streaking superimposes the ultrashort X-ray beams with a circularly polarized infrared laser and correlates relative phases in the laser to the momenta of photoelectrons in a plane perpendicular to the beam. The energies of these photoelectrons can be obtained by Time-of-Flight spectrometers (eTOF).
In the SpeAR_XFEL project (Spectroscopy with Angular Resolution for ultrafast experiments at X-ray FELs) we develop a novel detector aimed at angular streaking. It consists of a specialized vacuum chamber, designed along with a new kind of eTOF, suitable to be implemented in the magnetic shield of the chamber. Special care has to be taken in order to create a robust and precise design compatible with the material stress resulting from the high temperature baking process of UHV components.
We present the newly developed concept for a UHV compatible installation of a Time-of-Flight spectrometer array inside a magnetically highly sensitive area.