Seminar, Dr. Codrina Ionita Schrittwieser
On Wednesday, May 28, at 14.00 in the Auditorium at The Auroral Observatory Dr. Codrina Ionita Schrittwieser, from the University of Innsbrück, Austria, will give a seminar tomorrow on the topic: "Plasma source with cavity-hollow cathode"
Codrina Ionita Schrittwieser is a well recognized plasma experimentalist who has worked extensively on diagnostics of double layers and turbulence in plasmas, and also on plasma applications. The present talk is on a topic related to plasma applications. You are all welcome to attend!!! ABSTRACT. A hollow-cathode discharge is characterized by high electron density due to the pendulum effect of electrons between the ion-rich sheaths on the cathode walls. This effect leads to high ionisation efficiency and thus high plasma density with strong light emission. In addition, the high discharge voltage of up to 600 V leads to intensive sputtering of the cathode material due to bombardment by energetic plasma ions. Thus a hollow cathode can be used as a source of intensive light, as cluster source and as sputtering source for various substances depending on the material the cathode is made of. By use of various gases also reactive sputtering can be performed. In contrast to magnetrons a hollow cathode does not need a magnetic field and is therefore suitable also for sputtering of ferromagnetic materials. Best regards, Åshild.
