Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Poster

HK 48.46: Poster

Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer

Production, properties, and probing of Laval Nozzles for Cluster-Jet Targets — •Silke Grieser, Daniel Bonaventura, Ann-Katrin Hergemöller, Benjamin Hetz, Fabian Hordt, Esperanza Köhler, Alexander Täschner, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany

A cluster-jet target achieves high and constant beam densities, which can be adjusted during operation. Therefore, it is highly eligible for storage ring experiments. By the expansion of pre-cooled gases within fine Laval nozzles a cluster source produces a continuous flow of cryogenic solid clusters. Essential for the production of clusters are the properties of the Laval nozzle. The production of such a nozzle with its complex inner geometry represents a major technical challenge. To ensure the production of these fine Laval nozzles for future internal targets, an improved production process based on the initial CERN production was recently developed at the University of Münster. Systematic investigations on Laval nozzles with modified geometries will clarify the outstanding questions of the cluster production process. Moreover, this is very important for the deeper understanding of the cluster beam characteristics, in particular: the density, velocity, and mass, affected by the geometry of the nozzle. The production process and initial measurements with these new nozzles at the PANDA cluster-jet target prototype will be presented and discussed.
Supported by EU (FP7), BMBF, and GSI F+E.