Highlights 2018  

Research news from the division Plasma Edge and Wall

24.10.2018: New High Current Source „SIESTA“ for Materials Research in Operation

After about 40 years of operation IPP’s old high current ion source, an experiment for investigating plasma-surface processes, was taken out of service. The successor experiment „SIESTA“ has now successfully started operation. [more]

10.8.2018: Line ratio spectroscopy on thermal helium at ASDEX Upgrade

The new thermal helium diagnostic provides highly resolved electron temperature and density profiles in the plasma edge region of ASDEX Upgrade. [more]

7.8.2018: Measurement of the tilt angle of turbulent structures with Doppler reflectometry

Measurements of turbulent density fluctuations are important to better understand transport in fusion plasmas. Characteristic for the structures are their tilt with respect to the radial direction. The tilt angle is predicted by theories and gyrokinetic simulations and depends on the dominant micro-instability and on the interaction of turbulence and plasma flows. [more]

5.7.2018: SOLPS modelling of a snowflake configuration for the future upper divertor in ASDEX Upgrade

The power fluxes to the divertor target plates expected in a fusion reactor based on the tokamak design in single-null (SN) configuration might challenge the current material limits. Alternative divertor geometries, such as the snowflake (SF) configuration, are therefore currently discussed as a possible solution for the power exhaust problem. [more]

8.5.2018: Structure and Nonlinear Development of Edge Localized Modes on the Tokamak ASDEX Upgrade

Edge localized modes (ELMs) are periodic instabilities that might cause intolerably high heat fluxes onto first wall materials in future fusion devices. [more]

11.4.2018: Again EUROFusion Grants for young E2M Scientists

Already repeatedly young E2M scientists have managed to obtain EUROFusion researcher grants. We reported about such success already in 2017 and 2015, see below. This time Anna Medvedeva and Marco Cavedon applied successfully. The following brief summaries inform about their projects: [more]

15.03.2018: Influence of magnetic perturbation fields on the heat transport in the boundary of tokamaks

In order to control edge-localized instabilities in future fusion devices, the use of three-dimensional (3D) magnetic perturbation (MP) fields is currently discussed. How these perturbation fields affect the particle and heat transport in the boundary layer of the plasma has now been investigated in a doctoral thesis carried out at IPP. [more]

6.2.2018: Hydrogen Isotope Exchange in Tungsten at Low Temperatures

Hydrogen is retained in tungsten by bonding to lattice defects. Details of this bonding play a decisive role in diffusion, retention and permeation in or through tungsten. This determines how much tritium can accumulate in tungsten. [more]
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