PSI research in the ITER divertor parameter range at the FOM PSI-lab

J. Westerhout, W. R. Koppers, W. A.J. Vijvers, R. S. Al, S. Brezinsek, S. Brons, H. J.N. Van Eck, R. Engeln, B. De Groot, R. Koch, H. J. Van Der Meiden, M. P. Nuijten, V. Philipps, M. J. Van De Pol, P. R. Prins, U. Samm, J. Scholten, D. C. Schram, B. Schweer, P. H.M. SmeetsD. G. Whyte, E. Zoethout, A. W. Kleyn, W. J. Goedheer, N. J.Lopes Cardozo, G. J. Van Rooij

Research output: Contribution to journalConference articlepeer-review

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 T e≤ 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.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalPhysica Scripta
VolumeT128
DOIs
Publication statusPublished - 2007
Event11th International Workshop on Plasma-Facing Materials and Components for Fusion Applications - Greifswald, Germany
Duration: 10 Oct 200612 Oct 2006

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