Program of the International School on Low Temperature Plasma Physics and its Master Class 2022

In 2022, the 25th International School on 'Low Temperature Plasma Physics: Basics and Applications' (02.10.2022 - 06.10.2022) and its Master Class 'Electric propulsion' (06.10.2022 - 08.10.2022) will take place at the Physikzentrum Bad Honnef (Germany).

Program of the School

We are looking forward to it because, once again, we are putting together a very promising program, with the support of many colleagues who are willing to give a talk at the School.

2022-10-02
08:45 Welcome and introduction (plot of the school, information)
Marc Böke & Marina Prenzel / Jan Benedikt & Holger Kersten (Ruhr-University Bochum & CAU Kiel, Germany)
09:00 Introduction I: Fundamentals of Plasma Physics
Achim von Keudell (Ruhr-Universität Bochum, Germany)
10:30 Coffee break
10:45 Introduction II: Fundamentals of Plasma Physics
Achim von Keudell (Ruhr-Universität Bochum, Germany)
12:30 Lunch
13:45 Plasma Modeling I: Modeling of plasmas
Annemie Bogaerts (University of Antwerp, Belgium)
15:15 Coffee break
15:30 Plasma sources I: Non magnetized rf discharges
Michael Klick (Plasmetrex GmbH, Germany)
17:00 Forum with teachers
18:30 Dinner
20:00 Evening lecture: History of plasma physics
Holger Kersten (CAU Kiel, Germany)


2022-10-03
09:00 Plasma Modeling II: Electron kinetics in atomic and molecular plasmas
Luís L. Alves (University of Lisbon, Portugal)
10:30 Coffee break
10:45 Plasma Modeling III: Fluid modeling of discharge plasmas
Luís L. Alves (University of Lisbon, Portugal)
12:30 Lunch
13:45 Plasma diagnostics I: Basics of plasma spectroscopy
Sylvain Iseni (GREMI/Univers. Orleans, France)
15:15 Coffee break
15:30 Plasma diagnostics II: Measuring electron density and ion flux
Felipe Iza / Jan Benedikt (The Open University, United Kingdom / CAU Kiel, Germany)
17:30 Forum with teachers
18:30 School Dinner


2022-10-04
09:00 Plasma sources II: High pressure thermal plasmas and sources
Tony Murphy (CSIRO, Australia)
10:30 Coffee break
10:45 Plasma sources III: High density magnetized plasma sources
Tsanko Tsankov (Ruhr-Universität Bochum, Germany)
12:30 Lunch
14:00 Workshop Simulation
Luís L. Alves & Antonio Tejero (IPFN/IST, Lisbon, Portugal, UCO, Córdoba, Spain)
Attendees will be given the opportunity to perform a series of exercises, analyzing the evolution of the EEDF in different atomic and molecular gases, with variations in the applied electric field (amplitude and possibly frequency) and/or in the populations of vibrationally / rotationally excited states. A comparison between calculated and measured swarm parameters will also be proposed. The workshop is very interactive, with plenty of questions / discussions taking place, focusing on both physical and numerical features.
14:00 Experimental Workshop II
Sebastian Burhenn, Sylvain Iseni (Ruhr-Universität Bochum, Germany; GREMI/Univ.Orleans, France)
In the Experimental Workshop II two maybe three so called active investigation tools are covered. The objective of this experimental workshop is to give the attendees a first insight into the technical aspects including some difficulties and pitfalls that may be encountered when using optical emission spectroscopy (OES) as plasma diagnostics tool. For this we will go down to the basics and we will setup our own spectrographs. For this we will have to discuss the influences of the dispersing element. Answer questions: What are these slits for? Do we have to think about them? Try to wave length calibrate our systems. Compare our home-made to modern so called USB spectrographs. Interpret the emission spectra of some selected light sources by use of analysing software. (maybe) apply our diagnostics to the DC plasma reactor of the alternative experimental workshop. A brief reminder of the requirements for OES and the consequences for the actual instruments will be given first, together with the underlying hypothesis and lmitations. Attendees will be given the opportunity to setup and compare the two basic types of spectrographs and apply these systems
14:00 Experimental Workshop I
Olivier Guaitella (LPP, Ecole polytechnique, France)
The objective of this experimental workshop is to shed light on some difficulties and pitfalls that may be encountered when using plasma diagnostics tools. Real examples are going to be experienced using a DC plasma reactor. As the simplest possible plasma discharge, it should allow relatively easily to obtain basics parameters such as electric field, gas temperature, and densities of main species. Along the workshop, we will illustrate that even in the simple conditions of a low pressure DC glow discharge in Argon, large errors can be made if things are not carefully done. The main diagnostic tool will be tuneable laser diode to perform absorption spectroscopy. Tunable laser absorption spectroscopy will be used to assess Ar (3P2) metastable state density, but also the gas temperature. Besides the presentation and fine description of all parts of the experiment, attention will be paid to the optical alignment, the optical saturation effect, and various possible traps. Measurements will focus on the changes in the plasma, and therefore in the Ar (3P2) concentration, with experimental conditions like the gas pressure, discharge current, gas mixture composition. In a second step, we will try to measure the same metastable states of argon but this time by Laser Induced Fluorescence. A small spectrometer will also be used to perform optical emission spectroscopy on the same plasma. The electric field will be measured in the discharge by using floating potential probes. Together with the gas temperature, this will give us the reduced electric field in order to analyse optical emission data.
14:00 Hiking
Possible destinations can be requested from the organization team
18:30 Dinner


2022-10-05
09:00 Plasma sources IV: Dielectric barrier discharges
Olivier Guaitella (CNRS, France)
10:30 Coffee break
10:45 Plasma technology I: Material processing
Peter Awakowicz (Ruhr-Universität Bochum, Germany)
12:30 Lunch
13:45 Plasma diagnostics III: Advanced optical diagnostics
Richard Engeln (ASML, The Netherlands)
15:15 Coffee break
15:30 Demonstration on emission spectroscopy
Olivier Guaitella & Sylvain Iseni (LPP, Ecole polytechnique / GREMI/Univ. Orleans, France)
17:30 Forum with teachers
18:30 Dinner
20:00 Poster session plasma school


2022-10-06
09:00 Plasma diagnostics IV: Plasma-surface interactions
Jan Benedikt (CAU Kiel, Germany)
10:30 Coffee break
10:45 Plasma technologies II: Development at high pressures and in liquids
Peter Bruggeman (University of Minnesota, USA)
12:30 Lunch


Program of the Master Class on Electric propulsion

Regular lectures have duration of ~1.15h + 15min for final extended discussion

2022-10-07
08:45 Welcome and introduction
Jan Benedikt & Thomas Trottenberg (CAU Kiel, Germany)
09:00 Basics of electric propulsion for spacecraft: Hall thrusters: principles, technologies and performan
Stephane Mazouffre (CNRS/Univ. Orleans, France)
11:15 Coffee break
11:30 Diagnostics for EP in ground-based test facilities and in orbit
Thomas Trottenberg (CAU Kiel, Germany)
13:15 Lunch
14:30 Ion thrusters: from a nice technology to a game changer
Kristof Holste (University Gießen, Germany)
16:00 Master class poster session with coffee and biscuits
17:30 In-situ characterization of electric propulsion thrusters: fundamentals, tools and applications
Carsten Bundesmann (IOM Leipzig, Germany)
19:00 Dinner


2022-10-08
09:00 Basics of electric propulsion for spacecraft II: gridded ion thrusters: principles, technologies and
Hans Leiter (University Gießen, Germany)
10:30 Coffee break
10:45 Understanding the physics of ion thrusters with the help of modeling
Jean-Pierre Boeuf (University Toulouse, France)
12:15 Closing
Thomas Trottenberg (CAU Kiel, Germany)
12:30 Lunch

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