Bremen 2017 – scientific programme

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P: Fachverband Plasmaphysik

P 15: Helmholtz Graduate School II

P 15.24: Poster

Tuesday, March 14, 2017, 16:30–18:30, HS Foyer

Tools for designing the next generation of Stellarators. — •Jim-Felix Lobsien — Max-Planck Institute for Plasma Physics, Greifswald, Mecklenburg-Vorpommern

Stellarators possess a complex magnetic coil system. At the border between mathematics and its realization, one faces the problem of deviations. It is impossible to build a complex system as one computed it. Furthermore, the exceptional shape makes it difficult to manufacture the coils, the heavy weight complicates the assembly and the usage leads to additional deviations. The question arises, how does the quality of the vacuum magnetic field changes under small deviations of the coil system. Until now, stellarator optimization tries to find the best possible configuration and neglects this information. In this work, we concentrate on the modification of the stellarator optimization routine. In each optimization step, we include the information about the change of the quality of the magnetic field under deviation in the valuation of the coil system. So far stellarator optimization tries to find a peak optimum whereas our newly developed tools seeks for a flat, more realistic optimum. Our goal is to generate a coil system which under small deviation produces an equally good magnetic field. This quality is called robustness.