Light reflections are one of the main and often underestimated issues of plasma emissivity
reconstruction in visible light spectral range. Metallic and other specular components of
tokamak generate systematic errors in the optical measurements that could lead to wrong
interpretation of data. Our analysis is performed at data from the tokamak COMPASS. It is a
D-shaped tokamak with specular metallic vessel and possibility of the H-mode plasma. Data
from fast visible light camera were used for tomographic reconstruction with background …

Our analysis is performed at data from the tokamak COMPASS. It is a D-shaped tokamak
with specular metallic vessel and possibility of the H-mode plasma. Data from fast visible
light camera were used for tomographic reconstruction with background reflections
subtraction to study plasma boundary. In this article, we show that despite highly specular
tokamak wall, it is possible to obtain a realistic reconstruction. The developed algorithm
shows robust results despite of systematic errors in the optical measurements and …