Multiple-pinhole camera for monitoring three-dimensional plasma shape

This study analyzes the feasibility of a new method for monitoring the three-dimensional (3D) shape of an asymmetrically magnetized high-temperature toroidal plasma. The proposed method utilizes multiple pinholes on a single disk. Devoid of any assumptions on the plasma shape, 3D tomography images of Te and ne can be successfully created using mathematical methods based on an expansion of the Fourier–Bessel series and a regression analysis on the dataset of the multiple soft X-ray filaments in numerical experiments.