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TP4
SIYAO XU
Siyao Xu from Peking University, China, will give a talk on "Damping of MHD turbulence in partially ionized media" on September 2, 2015 as part of the Space and Astrophysics Seminar. The talk has been held NB 7/67 at 10:15 am. Those interested are welcome to attend!
Siyao Xu is a guest at the Institute of Theoretical Physics IV in August and September.
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EP2
ATTA UL HAQ
PhD student Atta Ul Haq from the University of Ulster (UK) is visiting the Chair of Experimental Physics II for two and a half months (14.9.-30.11.). In the framework of his RAPID project "Microplasma-based synthesis of composite semiconducting nanoparticles" he is working together with Master student Philip Lucke.
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TET
ASST. PROF. DR. VASCO GUERRA
Asst. Prof. Dr. Vasco Guerra from IST Lisboa, Portugal, will visit Dr. Efe Kemaneci from TET on September 3rd. His talk about "Kinetic modelling of microwave discharges in O2-containing mixtures" is at 11:00 am (ID 04/413).
Everybody interested is welcome to join!
Abstract: A self-consistent kinetic model is developed in order to study the elementary processes occurring in surfacewave microwave discharges in pure O2 and in the mixtures O2-Ar, O2-N2 and O2-N2-Ar. The theoretical formulation is based on the solution of a system of 0-D rate balance equations for the dominant neutral and charged species, coupled to the homogeneous electron
Boltzmann equation and to the quasi-neutrality condition, allowing the self-consistent determination of the sustaining reduced electric field E/N. The model is used to investigate different phenomena, such as dissociation in O2 discharges, production of O2(a) and UV emitting species, or the formation of NO and O3 molecules. The extension of the model to situations of
small-diameters / low-pressures, where the kinetics is strongly dominated by electron-impact collisions and wall interactions, is briefly discussed.
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TP4
PETER H. YOON
Peter H. Yoon from the University of Maryland - Institute for Physical Science and Technology - USA, has received a "VIP Grant of the Reseach School PLUS". He will spend the next three years at the Ruhr-Universität Bochum, from which especially the PhD students will benefit (international enrichment of the "graduate education").
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EP5
MARC VAN DER SCHANS
Marc van der Schans from the Department of Applied Physics, Elementary Processes in Gas discharges (EPG) at the TU Eindhoven (Netherlands) is visiting PhD student Patrick Böhm (Experimental Physics V) during the week of July 27-31, 2015. The goal of the collaboration includes the application of the electric field measurement technique, which will be further developed by Patrick Böhm in the context of his PhD thesis at Ruhr-Universität, to a plasma bullet discharge, which will be further developed and extensively analyzed by Marc van der Schans, also in the context of his PhD thesis. In case of positive results, the results will even lead to the construction of a corresponding setup at the TU Eindhoven, whereby the rarely represented electric field measurement technique, also known as "E-CARS", would find another application site.
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EP5
DR. QING XIONG
Dr. Qing Xiong, researcher and Assistant Professor from College of Electrical Engineering, Chongqing University, China, gives a talk about "Atmospheric Pressure Micro-plasma Jets and Glow Discharge with Water Electrode". It will be on July 15th, 2015, at 10:15 am at NABF05/694. Anybody interested is welcome to join.
Dr. Qing Xiong will be visiting Prof. Dr. Uwe Czarnetzki at Experimentalphysics V. His research interests mostly focus on advanced spectroscopic diagnostic of cold atmospheric pressure plasmas and plasma interacting with liquids.
Abstract: Non-equilibrium atmospheric pressure micro-plasma jets have recently obtained increasing attention for their unique features such as chamber-less operation and enhanced chemistry without elevated gas temperature. These attractive features make them prospective in several emerging novel applications, such as bio-medicine, material synthesis and surface modification. Characterizations and control of these micro-discharges are important, especially their physics and chemistry, to get insights into mechanisms of plasma treatments. On the other side, plasma interacts with liquid are common in plasma in liquid or in contact with liquid, but interaction processes are very complicated. Until now the fundamentals of interactions between plasma and liquid still remain open with a lot of indistinct issues. Important questions about how the plasma affects the liquid chemistry, and meanwhile how the liquid influences the chemistry of plasma, need to be answered.
These are the main background of my talk, and I will report the characterizations of atmospheric pressure micro-plasma jets, include their physics and chemical features based on plasma diagnostic (OES, LIF, etc). Meanwhile, the presentation will report my recent result of OH radicals production in a glow discharge in contact with water, based on broadband UV absorption spectroscopy measurements. Production mechanism of OH radicals in the discharge above water will be discussed.
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EP5
DR. RALF HEIDEMANN
On Friday, July 17, 2015, at 10:15 a.m., Dr. Ralf Heidemann from Thales Germany will give a talk on "The HEMP Thruster Technology - The next generation ion propulsion engines for satellites and interplanetary missions" in NABF 05/694. Dr. Heidemann comes from the department "Electric Propulsion R&D - Electron Devices" of the Thales Group in Ulm and is guest of Prof. Dr. Uwe Czarnetzki at the Chair of Plasma and Atomic Physics Experimental Physics V).
Interested parties are welcome!
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TP4
PROF. DR. YURI LITVINENKO
Prof. Dr. Yuri Litvinenko from the University of Waikato, Hamilton, New Zealand will be visiting the Chair of Space and Astrophysics (Theoretical Physics IV) from 01.12.2015 to 26.02.2016. His stay is funded by the Research School PLUS in the program "Visiting Research Professor" (VIP) through an award applied for by Prof. Dr. Reinhard Schlickeiser and PD Dr. Horst Fichtner. This support will also be used for further longer visits in the period until November 2017.
Foto: Copyright University of Waikato
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SCHÜLERPRAKTIKANT JAKOB RAFFLER
Within the framework of the Austrian Matura (high school diploma), a pre-scientific paper is required. Jakob Raffler, student at the Bundesrealgymnasium GRG 23 Altererlaa, Vienna also supervised by Renate Stingl writes in his thesis about "Research on pulsed high power plasmas at the Ruhr-Universität Bochum". In order to get first-hand information, he is therefore a guest at the SFB-TR87 for one week (6.7.-10.7.2015) and together with Christian Maszl (Project C3, Institute of Experimental Physics II) is working both experimentally and theoretically on plasmas and their applications. In March 2016, he will hand in his work and give a presentation at his school. We wish him a lot of fun in Bochum and success with his work!
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SUMMER SCHOOL ON PLASMA CHEMISTRY
From 2 to 4 July 2015, DIFFER hosted 40 students, PhD candidates and post-docs in a summer school on plasma chemistry as part of the 22nd International Symposium on Plasma Chemistry. The summer school programme concentrated on the basics of plasma physics and chemistry and its application. Expert courses and workshops delved into plasma physics, plasma chemistry, plasma sources and applications from thermal to non-equilibrium plasma technology. Prof. Dr. Achim von Keudell and Dr. Volker Schulz-von der Gathen (both from Experimentalphysics II, RUB) gave talks at this school.
link to Summer School
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TET
DR. PETER VENTZEK
Next Monday, July 6th, 2015, Dr. Peter Ventzek from Tokyo Electron is giving a talk on "Plasma process simulation: role in process and equipment development". The talk starts at 16:00, in room ID 03/463. All interested are highly welcome.