Investigation of turbulent plasma boundary of tokamak COMPASS using two deeply-reciprocating probes, interpreted by numerical models Project ID: GAP205/12/2327 Provider: Czech Science Foundation Period: Jan 01, 2012 - Dec 31, 2015 Principal Investigator: Mgr. Jan Horáček, Ph.D. Co-investigators , , , , , , Aims of the project: Decrease of hot plasma transport towards the inner tokamak surface is a long-term key topic of international research with the goal both to prolong lifetime of the inner wall and to decrease plasma impurity content. Within this project, on the Prague tokamak COMPASS (and also ASDEX-Upgrade) we will study two key parts of this problem experimentally: a) turbulent transport in edge plasma, interpreted by the numerical model ESEL, with the aim to scale the SOL width up to 10x larger tokamak ITER (combined with experiment on the Joint European Torus). The diagnostics ideal for such study, two reciprocating probes, are installed, supported by other diagnostics. b) We perform challenging coverage of the probe head with diamond layer and accelerate its movement in order to sustain much higher heat fluxes than usual. This permits to study turbulence of the H-mode pedestal (responsible for better plasma confinement), which turbulent structures are yet experimentally unexplored.