Zum Betrieb künftiger Fusionskraftwerke muss es gelingen, den heißen Brennstoff gut wärmeisoliert einzuschließen. Der dazu benutzte magnetische Käfig muss daher möglichst robust sein. Ausgerechnet bei den besonders interessanten “fortgeschrittenen" Betriebsweisen, die im internationalen Fusionstestreaktor ITER geplant sind, sind jedoch störende Instabilitäten zu erwarten: So genannte “Externe Kink-Moden" könnten die von ITER erreichbare Fusionsausbeute empfindlich absenken. Gegenmaßnahmen wurden nun vom Max-Planck-Institut für Plasmaphysik (IPP) in europäischem Auftrag untersucht. Das dazu entwickelte neue Rechenprogramm “Starwall" darf als weltbestes seiner Art gelten - dank der Expertise der Stellarator-Fachleute im IPP, die in diesen Tokamak-Code eingeflossen ist.
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