Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 33: Poster VI
A 33.10: Poster
Thursday, March 14, 2024, 17:00–19:00, Tent A
A dedicated angular streaking setup for attosecond photoionization experiments — •Lasse Wülfing1, Niclas Wieland2, Lars Funke1, Arne Held1, Wolfram Helml1, Sara Savio1, and Markus Ilchen2 — 1Technische Universität Dortmund — 2Universität Hamburg
Angular streaking represents a scheme to resolve photoionization processes down to the attosecond regime, reaching even the natural time frame of fundamental electronic interactions in atomic and molecular systems. This is done by the reconstruction of superfast SASE free-electron laser pulses for use in photoionization experiments. A circularly polarized laser is superimposed onto the X-ray pulses, generating a birth time correlated kick for photoelectrons produced in a given target gas. By using multiple electron spectrometers in one plane around the interaction point, the initial pulses can be reconstructed.
Our group developed a dedicated detector for angular streaking, incorporating two planes of newly designed electron time of flight spectrometers for broad energy-acceptance into a mu-metal shielded vacuum chamber. The setup is meant as a versatile basis for angular streaking experiments realized in different scenarios. This poster presents an overview of the derived design and current status in the construction of the dedicated setup at FLASH (DESY).
Keywords: Angular Streaking; Attosecond physics; Electron spectroscopy; Detector; Photoionization