From Power Exhaust to Dilution & Radiation Collapses: Impurity transport and radiation physics in W7-X
Institutskolloquium
- Datum: 26.02.2021
- Uhrzeit: 10:30 - 12:00
- Vortragender: Dr. Felix Reimold
- Felix Reimold is leading the impurity transport and radiation physics group at the Max-Planck Insitute for Plasma Physics in Greifswald. He studied physics at the Karls-Ruprechts University of Heidelberg and the Technical University of Munich. Mr. Reimold graduated at the Technical University of Munich with his PhD thesis focusing on experiments and numerical modeling of power exhaust scenarios with impurity seeding in ASEDX Upgrade. During his PhD he won a Eurofusion Researcher Grant and was coordinating power exhaust experiments as a scientific coordinator in the Eurofusion MST-framework. In 2017 he became part of the ITPA group on divertor and SOL physics. Mr. Reimold worked at/with various institutions, including the Max-Planck Insitutes for Plasma Physics in Garching and Greifswald, the Plasma Science and Fusion Center at the Massachusetts Institute of Technology in Boston and the Forschungszentrum Jülich. Currently, Mr. Reimold is responsible for the divertor bolometry system at W7-X, leads the topical group on impurity transport and radiation physics, and coordinates the EMC3-modeling user group at W7-X. His research interests include spectroscopy, bolometry, impurity transport and power/particle exhaust both in modeling and experiment.
- Ort: Zoom Meeting Room 1
- Gastgeber: Dmitry Moseev
- Kontakt: dmitry.moseev@ipp.mpg.de
Power dissipation in the boundary plasma with radiation from actively seeded impurities will be mandatory for future fusion devices. Hence, the presence of impurities in the plasma is not only unavoidable, but also desired in the boundary plasma domain. At the same time, the contamination of the confined plasma with impurities comes at the cost of plasma performance and even the limitation of the accessible operational parameters due to the occurrence of radiation collapses. This contradicting requirements on the impurity content in different parts of a reactor fusion plasma necessitates a detailed investigation of impurity transport and of the processes that stipulate radiation losses. A detailed understanding will allow us to determine and to control an optimized operation scenario in a future reactor. The talk introduces the current state of understanding of impurity transport in the boundary and the confined plasma as well as the observations on the radiative losses and its role in power exhaust in W7-X.