Reconstruction of 3-D Radiation Profile From 2-D Images Viewed by IR Imaging Video Bolometers With SVD

Radiation is one of the major paths of power loss from fusion plasmas. Since the radiation distribution has a complex 3-D structure in helical devices, such as a large helical device (LHD), 3-D radiation measurements, are required for understanding the power balance of fusion plasmas. IR imaging video bolometers (IRVBs) installed in the LHD were examined as one system of 3-D imaging using a projection matrix that is obtained under the assumption of plasma periodicity in the toroidal direction, and using the phantoms obtained numerically with the EMC3-EIRENE code as the impurity distribution. The reconstructed profiles indicate the capability of the current system of IRVBs for imaging the 3-D radiation distribution in LHD.