SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Instrumentation V

HK 14.4: Vortrag

Dienstag, 21. März 2023, 18:15–18:30, SCH/A.101

Determination of hydrogen cluster size distributions for different cluster-jet target stagnation conditions — •Hanna Eick, Philipp Brand, Christian Mannweiler, Sophia Vestrick, and Alfons Khoukaz — Institute for Nuclear Physics, Westfälische Wilhelms-Universität Münster

The internal and windowless cluster-jet targets from the WWU Münster are a key component of several experiments at various research facilities. One of them is the HHU Düsseldorf where the 200 TW ARCTURUS laser was used to investigate the laser-cluster interaction. In this context measurements are performed in order to study some important properties of the used hydrogen clusters, like the size of the clusters and their size distribution. To find out the size of the clusters, they are visualized by the shadowgraphy method. For this purpose, the ultrashort pulse ARCTURUS laser is illuminating the cluster beam and shadowgrapy images are taken. The evaluation of cluster diameters has to be automated due to the large number of recorded photos. This talk provides an overview of the results of the analyzed shadowgraphy measurements for various target settings and also for different positions in the cluster beam. By comparing the effective flow of material through the nozzle with the flow of clusters visible in these shadowgraphs, the amount of (invisible) gas embedded in the clusters can be estimated. This project has received funding from BMBF (05P21PMFP1), GSI FuE (MSKHOU2023) and the EU's Horizon 2020 programme (824093).