Berlin 2014 – scientific programme
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P: Fachverband Plasmaphysik
P 17: Poster Session - Helmholtz Graduate School for Plasma Physics
P 17.9: Poster
Wednesday, March 19, 2014, 16:30–18:30, SPA Foyer
First Turbulence Measuremenents using Poloidal Correlation Reflectometry at AUG — •Dmitrii Prisiazhniuk1, Andreas Kramer-Flecken2, Garrard Conway1, and Ulrich Stroth1 — 1Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, Germany — 2Institut für Energieforschung - Plasmaphysik, Forschungszentrum Jülich, Association EURATOM-FZJ, 52425 Jülich, Germany
The new poloidal correlation reflectometer (PCR) system (previously used on TEXTOR) has been installed on AUG. The system consist of two Ka-band and one U-band reflectometer. The waveguides connecting the reflectometers with the antennas array are allow the operation of reflectometers in O-mode and X-mode polarization. The transmitting antenna is surrounded by 4 receiving antennas all having square geometry to allow poloidal and toroidal correlation measurements. With the 2nd Ka-band reflectometer the investigation of radial correlation is possible.
The main parameters measured by the system are perpendicular rotation velocity and inclination of turbulence eddies relative to the toroidal direction. Furthermore turbulence properties such as poloidal correlation length, radial correlation length and turbulence decorrelation time can be accessed. These are important quantities for plasma edge studies and are currently not available at AUG. First measurements from the commissioning phase will be presented at this conference.