Abstract
A complex electrostatic-magnetic probe diagnostics, named as 'U-probe', is being prepared for measurement of properties of the filamentary structures in the edge plasmas of COMPASS tokamak. Probe will be composed of two identical towers.
Each tower will house 3 sets of 3D coils one balanced triple probe and six single Langmuir probes. The design of the probe is based on U-probe used on reversed field pinch RFX-mod [1] and takes advantage of our experience accumulated during design, manufacturing and exploitation phase of our combined electromagnetic probe at TJ-II stellarator.
This new COMPASS diagnostic will measure vorticity and longitudial electric current of the plasma filaments. Analysis of the properties and, particularly, the correlation between filament vorticity and its current is expected to shed light into physics of filamentary structures in the tokamak plasma edge.
The simulation of the probe surface temperature evolution as a function of expected incident heat loads within the COMPASS edge plasmas is presented.