The “Plasma-Wall Interaction” project operates various test and analysis devices, ranging from an accelerator to microscopes.
Sample surfaces can be investigated and modified at the six analysis stations of the tandem accelerator lab. Voltages of up to 3 million volts can accelerate various projectile ions to energies of several million electron volts. This allows one to investigate the composition of chemical elements near the sample surface and their depth distribution. [more]
GLADIS high-heat-flux test facility
In the Garching Large Divertor Sample test facility (GLADIS) samples and components are exposed to high heat and particle fluxes of up to 90 megawatts per square metre. This allows first-wall components of a fusion experiment to be tested under realistic conditions.
[technical data], [press release begin of operation 2005]
Metallography and microscopy
Detailed chemical analyses and materials science investigations are conducted in the metallography laboratory and with different optical microscopes and electron microscopes. [more]
Scanning electron microscopy allows higher resolution as well as a higher focal depth than optical microscopy by employing a high energy electron beam. [more]
Near-surface atomic compositions of samples as well as their chemical bonds and crystal structure are investigated by various specialised methods, e.g. photo-electron spectroscopy or x-ray diffraction. [more]
Low-temperature plasma and ion beam experiments
The project develops and operates well-diagnosed low-temperature plasmas, particle beam sources, and ion beam experiments to investigate the interaction of materials with fusion-relevant particles (hydrogen, deuterium, helium, …).[more]
In various furnaces and heating systems samples can be heated up to 2800 °C to investigate their thermal properties. Depending on the objective, the samples can be heated in vacuum or other atmospheres, e.g. inert gases such as argon and helium or reactive gases such as oxygen. Gases released from the samples can be identified and quantified by means of mass spectrometry. [more]
Thin films from nanometers to micrometers of almost any elemental composition can be produced by physical vapour deposition methods, e.g. by magnetron sputtering or vapour deposition.
Divertor manipulator at ASDEX Upgrade
The divertor manipulator of the ASDEX Upgrade fusion device allows exposure of material samples to the plasma. A vacuum lock allows samples to be exchanged from day to day without breaking the main vacuum of the ASDEX Upgrade plasma vessel. The standard sample head of the manipulator carries two target plates of the outer divertor, which, depending on the objective of the investigation, can be fitted with special samples or marker coatings. [more]