Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 30: Precision spectroscopy of atoms and ions (with Q)

A 30.6: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

Simulation and characterization of a multiwire backgammon gaseous detector for soft X-ray detection — •Mykhailo Dumchev, Jens Oberrath, and Anthimos Georgiadis — Institut für Produkt- und Processinnovation, Leuphana Universität Lüneburg, Deutschland

To proof the QED corrections of the 1s Lamb shift, high precision X-ray spectroscopy of low energetic transitions in high Z-ions is necessary. Since photons will be detected in coincidence with down-charged ions, a time resolution less than 50 ns and spatial resolution less than 100 µ m is required.

A promising candidate to meet these requirements is a multiwire backgammon gaseous detector (MWB). It consists of a spacer, an inlet gas plate, an array of seven wires as anode plane, and a cathode plane shaped like a backgammon surface. This anode-cathode arrangement allows for the required spatial resolution in two dimensions as shown by Beyer and Deslattes [1]. To proof that such a detector is able to fulfill the required time resolution, simulations with the software tool Garfield were performed. It turned out that a time resolution of about 26 ns can be reached. Based on these results a MWB is constructed and tested. Within this contribution measurements with this detector will be presented and compared to simulation results.

[1] H. F. Beyer and R. D. Deslattes, GSI Scientific Report 1983, p. 350