News Column

Studies from FOM Institute in the Area of Isotopes Reported

May 23, 2014

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Isotopes. According to news originating from Nieuwegein, Netherlands, by NewsRx correspondents, research stated, "The morphology changes induced by low energy deuterium ions on tungsten surfaces is studied for particle fluxes similar to those expected in the ITER divertor, as high as 1024 m(-2) s(-1). A new type of surface modifications by formation of nanostructures is observed to occur under those conditions."

Our news journalists obtained a quote from the research from FOM Institute, "The nanostructures formation is critically dependent on the particle flux and ion energy, and affected by surface temperature and particle fluence. It correlates with the formation of nano-cavities at a depth of about 40 nm below the surface. In addition, the positron annihilation Doppler broadening (PADB) measurements reveal a significant increase of defect concentration (mostly vacancy-type) after plasma exposure, and the evolution of defects is in line with the surface morphology changes with fluence and surface temperature."

According to the news editors, the research concluded: "The possible mechanism of cyclic trap mutation and dislocation loop punching due to high flux D exposure is discussed."

For more information on this research see: Enhanced modification of tungsten surface by nanostructure formation during high flux deuterium plasma exposure. Journal of Nuclear Materials, 2014;447(1-3):22-27. Journal of Nuclear Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Journal of Nuclear Materials -

The news correspondents report that additional information may be obtained from H.Y. Xu, DIFFER Dutch Inst Fundamental Energy Res, FOM Inst, Trilateral Euregio Cluster, NL-3439 MN Nieuwegein, Netherlands. Additional authors for this research include G.N. Luo, H. Schut, Y. Yuan, B.Q. Fu, A. Godfrey, W. Liu and G.D. Temmerman (see also Isotopes).

Keywords for this news article include: Europe, Isotopes, Tungsten, Deuterium, Nieuwegein, Netherlands, Nanostructural, Nanostructures, Nanotechnology, Transition Elements, Emerging Technologies

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Source: Science Letter

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