J Westerhout et al 2007 Phys. Scr. 2007 18 doi:10.1088/0031-8949/2007/T128/004
J Westerhout1, W R Koppers1, W A J Vijvers1, R S Al1, S Brezinsek2, S Brons1,2, H J N van Eck1, R Engeln3, B de Groot1, R Koch4, H J van der Meiden1, M P Nuijten1, V Philipps2, M J van de Pol1, P R Prins1, U Samm2, J Scholten1, D C Schram3, B Schweer2, P H M Smeets1, D G Whyte5, E Zoethout1, A W Kleyn1,6, W J Goedheer1, N J Lopes Cardozo1,3 and G J van Rooij1
Show affiliationsFOM-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.
52.55.Rk Power exhaust; divertors
52.40.Hf Plasma-material interactions; boundary layer effects
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
Issue T128 (March 2007)
Received 19 October 2006, accepted for publication 28 November 2006
Published 8 March 2007
J Westerhout et al 2007 Phys. Scr. 2007 18
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