Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.28: Poster

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

The Reaction Microscope at FLASH2: First Experiments at a versatile AMO Endstation — •Florian Trost¹, Kirsten Schnorr¹, Sven Augustin¹, Georg Schmid¹, Severin Meister¹, Hannes Lindenblatt¹, Yifan Liu¹, Sandra Erbel¹, Markus Braune², Marion Kuhlmann², Stefan Düsterer², Rolf Treusch², Thomas Pfeifer¹, Claus-Dieter Schröter¹, and Robert Moshammer¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg — ²DESY, Hamburg

A reaction microscope was set up and commissioned as a permanent user endstation at the free-electron laser in Hamburg (FLASH2). First XUV pump-probe experiments including ICD observation of neon-dimers were carried out at this endstation with a back-reflecting split-mirror. We varied the delay between pump and probe pulse to find the temporal overlap of the pulses and to obtain the average pulse duration via autocorrelation measurements of Ne²⁺ and Ar²⁺ ion rates.

Part of the setup is a newly designed jet source using supersonic expansion for target production. Being able to process both gaseous and liquid substances as well as a combination of both, the new source greatly expands the range of available targets. We used the new source to trace proton transfer in water-dimers, which were produced by seeding light and heavy water with helium.