1. PSI research in the ITER divertor parameter range at the FOM PSI-lab
- Author
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G.J. van Rooij, J. Westerhout, A.W. Kleyn, Richard Engeln, S. Brons, R.S. Al, M.P. Nuijten, H.J. van der Meiden, W.A.J. Vijvers, N.J. Lopes Cardozo, H.J.N. van Eck, V. Philipps, W.J. Goedheer, B. Schweer, P.H.M. Smeets, D.G. Whyte, S. Brezinsek, P.R. Prins, DC Daan Schram, M. J. van de Pol, R. Koch, J. Scholten, W.R. Koppers, E. Zoethout, U. Samm, B. de Groot, Science and Technology of Nuclear Fusion, Plasma & Materials Processing, and Plasma-based gas conversion
- Subjects
Electron density ,Materials science ,Hydrogen ,Plasma parameters ,Divertor ,Nozzle ,Flux ,chemistry.chemical_element ,Plasma ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,chemistry ,Atomic physics ,Mathematical Physics ,Beam (structure) - Abstract
FOM-Rijnhuizen is building, in cooperation with its Trilateral Euregio Cluster (TEC) partners, a PSI-laboratory to study plasma surface interaction (PSI) under extreme, ITER relevant plasma conditions. The largest linear plasma generator of PSI-lab is Magnum-PSI, and is designed to deliver up to 10 MW m-2 power over a 10 cm diameter hydrogen plasma beam with an electron density (ne) up to 1021 m-3 and electron-temperature (Te) between 1–5 eV. Magnum-PSI is presently under construction and its predesign is presented. Its forerunner is Pilot-PSI, in which record plasma parameters of ne=4×1021 m-3 at Te=2 eV in a ~1 cm wide hydrogen beam confined by a magnetic field (B) =1.6 T were measured at 40 mm downstream the source nozzle. At 17 mm in front of a target (located at 0.56 m distance from the source nozzle), ne>1021 m-3 and Te= 4 eV have been demonstrated. Initial experiments on exposing fine-grain carbon samples are presented that showed up to 20 µm s-1 erosion as a demonstration of the extreme plasma conditions. Spectroscopy was applied to compare chemical erosion yields for flux densities up to 5.0×1024 m-2 s-1.
- Published
- 2007
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