Abstract
Visible light computed tomography is quite attractive as one of diagnostic techniques for edge plasma. In this paper, a special CT scanner designed for plasma experiments is developed. Using two types of algorithm, the spline function method (SFM) and the algebraic reconstruction technique (ART), experiments on plasma image reconstruction are performed for a visible emission distribution in a neon discharge tube and Hα emission distribution of tokamak plasma. An effective method to avoid light reflection at the vacuum wall is employed. Two reconstruction methods, ART and SFM, are compared with eath other on their characteristics, advantages and disadvantages, from the view points of simulation and experiment. The effects of data missing on image reconstruction, which is a common problem for all plasma CT algorithms, are also discussed.
