Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Instrumentation

HK 26.3: Vortrag

Mittwoch, 21. März 2012, 14:45–15:00, P 2

Systematic Investigations on High Intense Cluster-Jet Beams for Storage Ring Experiments — •Esperanza Köhler, Ann-Katrin Hergemöller, Alexander Täschner, Hans-Werner Ortjohann, Daniel Bonaventura, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Deutschland

A high-density cluster-jet target will be one of two planned internal target stations for the PANDA experiment at the antiproton accelerator and storage ring HESR/FAIR. For the investigation of elementary pN interactions hydrogen and deuterium are of highest interest as used target material. Cluster-jet targets allow high and constant target densities at the interaction point, i.e. 2 m behind the nozzle, with the possibility of a continuous variation during operation. At the University of Münster a cluster-jet target prototype was designed, built up and set succesfully into operation. The system is installed in complete PANDA geometry, so that the observed cluster beam characteristics can be directly transferred to the later situation at PANDA. Recent optical investigations on the cluster beam directly behind the nozzle resulted in the observation of distinct density structures when the target is operated at highest densities. The development and installation of a special nozzle tilting system allows for the extraction of these high-intense core beams, leading to a significant improvement of the target density. The performance and achieved densities of cluster beams will be presented. Supported by EU (FP6+FP7), BMBF, and GSI F+E.