Speaker: Dr. Johann Riesch, IPP-Garching
Title: Technology & physics of plasma facing materials and components
Abstract:
The Max-Planck-Institute for Plasma Physics is one of the largest fusion research centres in Europe and works on determining the physical principles for designing a fusion power plant. A major topic is the interaction of the fusion plasma with the reactor wall which is addressed in the project "Plasma Wall Interaction". This presentation will give an overview of this project with its two large facilities a 3 MV tandem accelerator and the GLADIS high heat flux test device.
Studies on irradiation-induced stress relaxation using a an in-situ mechanical testing device will illustrate the work at the accelerator. In this device, the synergistic effects of irradiation damage, hydrogen retention and mechanical loading are investigated.
In GLADIS two ion sources, each with a power of 1 MW, enable the investigation of the technology and physics of plasma facing materials and components under high heat flux loads. Examples of "classic" high heat flux tests, in particular for the European DEMO reactor, are used to describe the characteristics of the device and typical test scenarios. Finally, work on the correlation of high heat flux tests in GLADIS with reactor application, e.g., in ASDEX Upgrade and SPARK is presented.
Bio: Johann Riesch is working as a materials scientist at the Max Planck Insitute for Plasma Physics (IPP) in Garching. He is part of the Plasma Wall Interaction project and dealing with the development and characterisation of materials and components for today and future nuclear fusion devices. He has been working on the development of tungsten composites for many years. His focus is now on the fundamental understanding of material behaviour in a fusion environment. He is responsible for the device GIRAFFE which allows mechanical testing with in-situ irradiation and for the high heat flux test device GLADIS a European user facility for the investigation of the technology and physics during high heat flux testing of plasma-facing material and components.