Hannover 2016 – scientific programme

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MO: Fachverband Molekülphysik

MO 14: Posters 3: Novelties in Molecular Physics: Theory of Molecular Dynamics, Collisions and Energy Transfer, and Experimental Techniques

MO 14.13: Poster

Wednesday, March 2, 2016, 16:30–19:00, Empore Lichthof

Detection system for dissociative recombination studies at the Cryogenic Storage Ring — •Sunny Saurabh¹, Arno Becker¹, Claude Krantz¹, Oldřich Novotný¹, Stefan Schippers², Kaija Spruck², Xavier Urbain³, Stephen Vogel¹, and Andreas Wolf¹ — ¹Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany — ²Institut für Atom-und Molekülphysik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — ³Université Catholique de Louvain B-1348 Louvain-la-Neuve, Belgium

Dissociative recombination (DR) is an important destruction and neutralization process in plasma environments, such as the interstellar medium. DR reaction rates, product channels and product excitation states are important parameters for describing such environments. Based on this DR reaction dynamics can be understood as well. We are planning to perform DR experiments in cold environment below 10 K for the first time in our newly commissioned Cryogenic Storage Ring at MPIK. In a configuration of merged electron and ion beams, neutral products form and leave the ion beam orbit. To collect these products a large-area, MCP-based neutral particle detector is used. The detector provides relative temporal information on neutral products in ∼ ns time scale. A fast ∼1 kHz frame-rate CMOS camera viewing the phosphor screen anode will allow us to correlate this temporal information with the product impact positions on the detector surface on event-to-event basis. For this purpose, a new data acquisition system to control the detector, the timing, and the collision energy between the electron and ion beams for DR rate measurements is under development.