3D Full-Wave modelling and EC mode conversion in realistic plasmas
Max-Planck-Institut für Plasmaphysik Greifswald Germany
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Published online: 25 March 2019
The wave physics of O-X conversion in overdense W7-X plasma is discussed. For this study, a new 3D, cold plasma full-wave code has been developed. The code takes advantage of massive parallel computations with Graphics Processing Units (GPU), which allows for up to 100 times faster calculations than on a single-CPU. A 3D calculation of the O-X conversion is demonstrated. We discuss limitations of the mode conversion scenario within the capabilities of the existing ECRH system in W7-X, and demonstrate an optimised conversion scenario in which the launching antenna location is altered. The conversion eﬃciency of the optimised scenario is predicted to be >85%.
© The Authors, published by EDP Sciences, 2019
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