Faculty of Physics and Astronomy

Physics Colloquium on 12.12.2022: Presentations for the Dissertation Award

08.12.22 | Event

On Monday (12/12/22) at 12:00 pm c.t., the next meeting of our Physics Colloquium will take place.

On this date, the two candidates for this year's dissertation award will give their presentations. The faculty is looking forward to the presentations of Dr. Meike Küßner and Dr. Julian Held.

In addition to conventional matter the theory of the strong interaction predicts a number of exotic hadrons whose internalstructure is more complex. Such exotic particles include e.g. glueballs composed only of gluons and hybrids. The understanding of such exotic states contributes to the fundamental question of how mass is generated via strong interaction. This talk will present, among other analyses, the results of a coupled partial wave analysis of events from different decay channels from two photon collisions which were detected using the BESIII detector located in China. This allows direct conclusions about the inner structure of the contributing resonances. The underlying motivation, applied strategies and obtained results and their relevance will be discussed.

Abstract lecture Dr. Meike Küßner

 

Magnetron sputtering plasmas are a well-established tool for the deposition of metallic or ceramic coatings. A target materialal is sputtered by fast ions extracted from the plasma and deposited on a workpiece.
From a plasma physics perspective, the
se discharges are very interesting because they feature a configuration of crossed electric and magnetic fields. Such configurations, as they are also found in hall effect
thrusters, are prone to create waves and in
stabilities. Magnetron sputtering discharges exhibit an unusually strong wave phenomenon - the so-called spokes. In this presentation, we will explain how these spokes are created and sustained and will discuss their influence on the ion transport, which has important implications for the quality and deposition rate of the created coatings.

Abstract lecture Dr. Julian Held

The introduction will be given by Prof. Dr. Ilya Eremin.

The faculty cordially invites all interested parties. The event will take place in lecture hall HNC 10 and hybrid via Zoom. Before the colloquium we offer coffee and cookies.

This link will take you to the Zoom event (Meeting-ID: 632 5520 9938, password: 526977). All dates of the Physics Colloquium can be found here.

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