Comprehensive experimental turbulence measurements for scale-resolved multichannel gyrokinetic code validation*

Turbulence is the main driver of heat transport which deteriorates the performance of fusion reactors. To design turbulence optimised devices, simulation codes need to be validated by experiments. Validation work has already been done for a single or a small number of turbulence parameters, showing agreement but also highlighting areas where disagreement helps point to new physics discoveries.

The comprehensive set of experimental turbulence data presented in this contributionis measured on ASDEX Upgrade in the same radial region and for two different plasma scenarios. It includes wavenumber spectra, density and temperature fluctuation amplitudes and radial correlation lengths, the poloidal dependence of the velocity perpendicular to themagnetic field as well as the cross phase between density and temperature fluctuations.

These quantities are measured for comprehensive code validation by Doppler reflectometers in both X-mode and O-mode polarization and an electron cyclotron emission radiometer. For this contribution they are compared to the gyrokinetic code GENE because of its mature capabilities to assess and reproduce core turbulence. In addition synthetic diagnostic modeling will be included to account for diagnostic effects on measurements.