Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.17: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 2.OG

The Cluster-Jet Target for PANDA — •Ann-Katrin Hergemöller, Esperanza Köhler, Silke Grieser, Alexander Töschner, Hans-Werner Ortjohann, Daniel Bonaventura, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Deutschland

A cluster-jet target will be the first one of two planned internal targets for the PANDA experiment at FAIR. At the University of Münster the target prototype was built up in complete PANDA geometry and successfully set into operation. Areal target densities of more than 2× 10¹⁵  atoms/cm² at a distance of 2.1 m behind the nozzle were achieved by the installation of a new tilting system. This device allows for an adjustment of the nozzle relative to the experimental setup. The thickness is reproducible, constant in time, and variable over several orders of magnitude by the adjustment of the stagnation pressure and temperature before the nozzle. Depending on the experimental program the target beam size and shape should be variable and should guarantee a low residual gas background. That can be realized with the application of special shaped skimmers for the target beam preparation. The cluster beam shape can be visualized by a new monitoring system based on a Micro Channel Plate. This enables a direct observation of an ionized cluster beam at a phosphor screen in combination with a CCD camera. In this presentation an overview of the cluster-jet target, various special features, and images of the cluster beam will be presented and discussed. Supported by EU (FP7), BMBF, and GSI F+E.