Full-wave modeling of the O-X mode conversion in the Pegasus Toroidal Experiment

Details Full-wave modeling of the O-X mode conversion in the Pegasus Toroidal Experiment Full-wave modeling of the O-X mode conversion in the Pegasus Toroidal Experiment

2011-04-05

arxiv.org/abs/1104.0743v1

Physics

Plasma Physics

11 figures

Scientific paper

10.1063/1.3609828

The ordinary-extraordinary (O-X) mode conversion is modeled with the aid of a 2D full-wave code in the Pegasus Toroidal Experiment as a function of the launch angles. It is shown how the shape of the plasma density profile in front of the antenna can significantly influence the mode conversion efficiency and, thus, the generation of electron Bernstein waves (EBW). It is therefore desirable to control the density profile in front of the antenna for successful operation of an EBW heating and current drive system. On the other hand, the conversion efficiency is shown to be resilient to vertical displacements of the plasma as large as \pm 10 cm.

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