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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Instrumentation XII

HK 48.5: Talk

Wednesday, March 30, 2022, 17:00–17:15, HK-H4

Cluster size determination using shadowgraphy measurements — •Hanna Eick, Christian Mannweiler, Sophia Vestrick, and Alfons Khoukaz — Institute for Nuclear Physics, Westfälische Wilhelms-Universität Münster

Cluster-Jet Targets from the WWU Münster are an important component of several experiments at different research facilities.
One of them is the HHU Düsseldorf where the ARCTURUS laser is used to investigate the laser-cluster interaction. In this context measurements are performed in order to study the properties of the clusters themselves. These properties include the size of the clusters and their size distribution as well as the amount of gas in which the measured clusters are embedded.
The method used for this purpose is based on the shadowgraphy principle, in which images were taken during the illumination of the cluster beam by <30 fs ultrashort ARCTURUS laser pulses. The evaluation of cluster diameters has to be automated due to the large number of recorded photos.
The talk provides an overview of the evaluation method and presents the results of these analyses. First results show an average cluster size in the order of a few micrometer, which will also be of high interest for other installations using cluster beams.
This project has received funding from the EU’s Horizon 2020 programme (824093).