Materials research under ITER-like divertor conditions at FOM Rijnhuizen

Materials research under ITER-like divertor conditions at FOM Rijnhuizen

At FOM Rijnhuizen, linear plasma generators are used to investigate plasma-material interactions under high-density (610 m!3), low-temperature (65 eV) plasma bombardment. Research into carbon-based materials has been focused on chemical erosion by hydrogen plasmas. Results from plasma exposure to high-flux (>10 H/m s) and low-temperature hydrogen plasma indicate silicon carbide has a lower rela...

Divertor interferometer diagnostic for ITER

In the harsh environment of the divertor region in ITER, plasmas spanning a huge density range from 1019 to 1022 m−3 are anticipated making measurement of the electron density particularly challenging. For any reasonable wavelength choice, the total phase measured by a conventional two-color interferometer system is always 2 and therefore subject to fringe counting errors. This problem can be r...

Divertor Requirements and Performance in ITER

Hydrogenic retention of high-Z refractory metals exposed to ITER divertor relevant plasma conditions

1) FOM-Institute for Plasma Physics Rijnhuizen, www.rijnhuizen.nl, Assocaition EURATOMFOM, Trilateral Euregio Cluster, Nieuwegein, the Netherlands 2) Instituto Tecnológico e Nuclear, Sacavém, Portugal 3) Max-Planck-Institut für Plasmaphysik, Association EURATOM, Garching, Germany 4) Leiden Institute of Chemistry, Gorlaeus laboratory Leiden, The Netherlands 5) Eindhoven University of Technology,...

Microanalysis of deposited layers in the inner divertor of JET with ITER-like wall

In JET with ITER-like wall, beryllium eroded in the main chamber is transported to the divertor and deposited mainly at the horizontal surfaces of tiles 1 and 0 (high field gap closure, HFGC). These surfaces are tungsten coated carbon fibre composite (CFC). Surface sampleswere collected following the plasma operations in 2011–2012 and 2013–2014 respectively. The surfaces, as well as polished cr...