Die Forschungs- und Querschnittsbereiche bieten nach Möglichkeit jedes Semester ein wissenschaftliches Einführungs- und Überblicksmodul für die Promovierenden an. Die Anmeldung erfolgt derzeit direkt bei den Modulverantwortlichen selbst.

Modultitel

Ion beam techniques have been and are key technologies at IOM since many years with various applications from materials science to electric propulsion. The activities at IOM span the range from tool development to process optimization to application and transfer. Here the tool development and some fundamentals are addressed.
The module will start with an introduction into the physics of plasmas and their application in ion sources used for thin-film processing or other applications. Technologically interesting plasmas are weakly ionized plasma discharges which are driven electrically, where collisions with neutral gas molecules and boundaries at which surface losses occur are important. The ionization of neutrals sustains the plasma in the steady state and electrons are not in thermal equilibrium with the ions. These topics are covered in the 1st part of the. In laboratory systems a plasma sheath is always formed between the plasma and any wall and this sheath region is central to all technological plasma discharges. For low-pressure discharges, the electrical power to sustain the plasma is coupled most efficiently to plasma electrons. Depending on the plasma discharge, different heating mechanism are active. Here, radio frequency (RF), electron cyclotron resonance (ECR) and direct current (DC) discharges are discussed.
This 1st part of the module serves as groundwork for understanding one of most important tools used at the IOM, ion beam sources, covered in the 2nd part. Here we address the different types of ion beam sources, their different principles of plasma excitation as well as beam extraction and formation. Specific applications of these ion sources are illustrated by selected examples. Another topic will be ion beam and plasma diagnostic tools that are used to characterize ion beam and plasma parameters. The range of methods spans from simple Faraday probes for measuring the ion current density to sophisticated techniques such as Two-photon Laser Induced Fluorescence (TALIF) spectroscopy to probe the neutral gas density. The use of these diagnostics will be illustrated with applications of electric propulsion in space. The last topic of the module covers ion solid interactions, for example, the ion stopping processes in solids as well as ion sputtering. These are fundamental for understanding ion implantation and ion surface interactions. In addition to the lectures, the visit of two labs, the plasma and ion beam lab is planned, where the experimental setups will be explained and discussed.
Following structure of the talks is planned:

  • Fundamentals of plasma physics (lecture of 60 min.)
  • The physics of the plasma sheath (lecture of 60 min.)
  • Plasma discharges I: RF discharges (lecture 60 min.)
  • Plasma discharges II: ECR & DC discharges (lecture 60 min.)
  • Ion beam sources (lecture 60 min.)
  • Ion beam and plasma diagnostics (lecture 60 min.)
  • Ion implantation and surface interactions (lecture 60 min.)
  • Visit of plasma and ion beam labs (60 min.)
Lehrende:Dr. Daniel Spemann (Modulverantwortlicher)
Dr. Carsten Bundesmann
Dr. Christoph Eichhorn Dr. Stephan Mändl
Startet wann?April 2022
Credit Points:1-2

 

The module will introduce you to the topics of polymer membranes and their applications in water treatment. Furthermore, preparation and surface engineering of membranes by use of electron beam-initiated reactions will be part of the education. The hot topics “removal of micropollutants by photocatalysis” as well as “microplastics in water” will be presented and discussed within further courses. Theoretical knowledge should be supplemented and made understandable by practical examples during a lab tour comprising membrane preparation, surface modification, characterization, application and upscaling in pilot scale. Actual research topics will be part of a mini symposium: here, PhD candidates/master students that are working within the membrane topic will provide poster pitches (2 Minutes) and welcome the module participants in an open discussion regarding synthesis/characterization/application. Also possible collaborations between the participants should be promoted. A final highlight will be a presentation by the managing director of qCoat GmbH (and co-founder of another IOM spin-off Solarion) and mentor of the spin-lab Leipzig to show the way from research at the IOM to spin-off companies. A final discussion round should enable the participants to get answers to all questions that arise regarding spin-off processes.

  • Polymer membranes for use in water treatment (lecture 60 min.)
  • Electron beam-initiated reactions on polymers (lecture 60 min.)
  • Photocatalysis with TiO2 to remove pollutants from water (lecture 60 min.)
  • Removal of microplastic from water (lecture 60 min.)
  • Membrane engineering at IOM (membrane preparation - surface modification - characterization - application) (lab Tour half day)
  • Mini Symposium: poster pitches of PhD candidates and students + open discussion (120 min.)
  • Technology transfer – from IOM to spin-off (presentation 120 min.) + discussion
Lehrende:Dr. Agnes Schulze
(Modulverantwortliche)
Dr. Daniel Breite
Dr. Kristina Fischer
Dr. Alexander Braun (qCoat GmbH)
Startet wann?SoSe 2022
Credit Points:1-2