Visible Light Tomography Considering Reflection Light in a Small Tokamak Device PHiX

In a small tokamak, the visible light emission is observed and used to investigate plasmas' behavior with fast camera. However, reflected causes systemic error in measuring emitted from plasma. this paper, we managed overcome reflection effect ray-tracing technique which utilized synthetic diagnostic platform of tokamak device PHiX at Tokyo Institute Technology using Raysect CHERAB python libraries. We successfully evaluated amount obtained tomographic reconstruction images simulated experimental data Tikhonov-Phillips regularization L-curve method choose an optimal parameter. also proposed project contour image onto camera validate tomography results.