0000000000973484
AUTHOR
G. Gros
Die vollst�ndige Methylierung phenolischer Hydroxylgruppen in Mehrkernverbindungen mit aromatisch gebundenem Chlor
Ein bei der Permethylierung von Kohlenhydraten bewahrtes Verfahren [Methylierung mit Dimethylsulfat/Ba(OH)2 inDMF/DMSO]1 konnte auf phenolische Mehrkernverbindungen ubertragen werden. Das Verfahren hat den Vorteil, unter den Reaktionsbedingungen aromatisch gebundenes Chlor unberuhrt zu lassen.
Overview of the JET results with the ITER-like wall
Following the completion in May 2011 of the shutdown for the installation of the beryllium wall and the tungsten divertor, the first set of JET campaigns have addressed the investigation of the retention properties and the development of operational scenarios with the new plasma-facing materials. The large reduction in the carbon content (more than a factor ten) led to a much lower Zeff (1.2-1.4) during L- and H-mode plasmas, and radiation during the burn-through phase of the plasma initiation with the consequence that breakdown failures are almost absent. Gas balance experiments have shown that the fuel retention rate with the new wall is substantially reduced with respect to the C wall. T…