Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.73: Poster

Tuesday, March 28, 2017, 16:45–18:45, F Foyer

Thickness monitoring at the Cluster-Jet Target for PANDA — •Ann-Katrin Hergemöller, Daniel Bonaventura, Silke Grieser, Benjamin Hetz, Matthias Seifert, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany

The first internal target which will be operated at the PANDA experiment at FAIR is a cluster-jet target. Within this target the cluster beam itself is formed by the expansion of pre-cooled gases within a Laval nozzle. To prepare the cluster beam two orifices are used, the skimmer and the collimator. For PANDA a target thickness of more than 10¹⁵ atoms/cm² in a distance of 2.1 m behind the nozzle is required to achieve the designated luminosity. With the target prototype, operating successfully for years at the University of Münster, it is routinely possible to provide thicknesses of more than 2× 10¹⁵ atoms/cm² in the required distance. Based on the experimental results of the cluster target prototype the final cluster-jet target source was designed and set into operation in Münster as well. To monitor the cluster beam and to determine the thickness two different monitor systems are included in the setup. In this presentation an overview of the target design, the monitor systems and their performance will be presented and discussed. Supported by BMBF, HGS HIRe and GSI F+E.