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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.27: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1

Multiphoton double ionisation of Neon studied at FLASH2 — •Hannes Lindenblatt¹, Kirsten Schnorr¹, Sven Augustin¹, Georg Schmid¹, Severin Meister¹, Florian Trost¹, Yifan Liu¹, Sandra Erbel¹, Markus Braune², Rolf Treusch², Thomas Pfeifer¹, Claus-Dieter Schröter¹, and Robert Moshammer¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg — ²DESY, Hamburg

The ionisation of Neon was studied by an XUV pump-probe experiment at the new Reaction-Microscope endstation at FLASH2. The variable gap undulators provide the opportunity to quickly change the central wavelength of the FEL photons. Combined with the Online Photoionisation Spectrometer (OPIS) for single-shot monitoring of the wavelength, this allows sampling of processes sensitive to the photon energy at the high intensity provided by a free-electron laser.

The production of doubly charged Ne²⁺ yield is analysed as a function of the photon intensity and energy around the Ne⁺ 2s²2p⁵ → 2s2p⁶ transition energy of 26.9 eV.