| Abstrakt: |
The paper discusses the methods of inverse problems solutions of gas and plasma diagnostics problems using tomographic algorithms, in conditions of limited data. Due to restrictions in the original data, conventional computed tomography algorithms cease to work, and their modifications are required. The partial absence of the angular data can be approximately compensated for by extrapolation of such data in the sinogram space, applying modifications of tomography algorithms. In particular, these algorithms should be complemented by a priori information and regularization procedures. In a computational experiment, a comparison of the errors of the reconstruction of models with weak refraction in the cases of parallel straight lines and curvilinear trajectories of penetrating radiation are made. [ABSTRACT FROM AUTHOR] |
