Simulation of the intermittent behavior of SOL turbulence in TEXTOR.

By quite a lot of experimental observations, it is now generally accepted that the plasma transport in the scrape-off layer (SOL) is characterized by turbulent intermittency. This process, known as (higher density) blobs which are projected on the wall, increases the wall erosion and reduces the divertor efficiency. In view of ITER and the other machines under construction, this interaction of the plasma with the wall is still an important topic. In this contribution, we analyse some simulations with the ESEL (Edge Scrape-off Electrostatic) code [1], applied on the geometry of TEXTOR. TEXTOR relevant parameters are used as input into the model for ohmic scenarios at first. The output of the runs is compared to results of the real experiment, in terms of several relevant characteristics.