The deteriorating effect of plasma density fluctuations on microwave beam quality
arXiv:1805.09594 · doi:10.1051/epjconf/201920301005
Abstract
Turbulent plasma edge density fluctuations can broaden a traversing microwave beam degrading its quality. This can be a problem for scenarios relying on a high spatial localization of the deposition of injected microwave power, like controlling MHD instabilities. Here we present numerical estimations of the scattering of a microwave beam by density fluctuations over a large parameter range, including extrapolations to ITER. Two codes are used, the full-wave code IPF-FDMC and the wave kinetic equation solver WKBeam. A successful comparison between beam broadening obtained from DIII-D experiments and corresponding full-wave simulations is shown.
arXiv commentEPJ Web of Conferences, EC-20 2018 Proceedings, submitted
References in corpus (7)
- BOUT++: a framework for parallel plasma fluid simulations
- Hermes: Global plasma edge fluid turbulence simulations
- Self-consistent simulation of plasma scenarios for ITER using a combination of 1.5D transport codes and free-boundary equilibrium codes
- Microwave beam broadening due to turbulent plasma density fluctuations within the limit of the Born approximation and beyond
- Influence of plasma turbulence on microwave propagation
- Propagation in 3D of microwaves through density perturbations
- Prospects for a dominantly microwave-diagnosed magnetically confined fusion reactor