Hannover 2020 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.20: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
Ultrafast Ionization of a BEC: Highly Charged to Neutral Microplasma — •Mario Neundorf1,2, Tobias Kroker1,2, Julian Fiedler1, Julia Bergmann1, Markus Drescher1,2, Klaus Sengstock1,2, Philipp Wessels1,2, and Juliette Simonet1,2 — 1Zentrum für Optische Quantentechnologien (ZOQ), Luruper Chaussee 149, 22761 Hamburg — 2The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg
In our experiment, we combine a 87Rb Bose-Einstein condensate with femtosecond laser pulses to investigate collective non-equilibrium dynamics after locally ionizing parts of the atomic cloud.
The quantum gas machine allows to simultaneously detect atoms, ions and electrons after photoionization and resolves the kinetic energy of the charged particles.
By using a micrometer sized waist for the ionizing laser, we can trigger ultracold plasmas with variable particle numbers. Tuning the initial kinetic energy of the ionization products allows bridging from highly charged to neutral plasmas.
The combination of a well-controlled target with negligible initial kinetic energy and the small system size allows us to simulate the underlying dynamics with charged particle tracing. This provides an excellent model system to study the experimentally demanding density regime between ionized solid-state nanoclusters and ultracold neutral plasma.