Phillipsndash;Tikhonov regularization of plasma image reconstruction with the generalized cross validation

摘要

The use of the Phillipsndash;Tikhonov regularization is proposed for numerically stabilizing the illhyphen;conditioned plasma image reconstructions. An objective function to be minimized leads to a linear estimator of the image intensity distribution and, with the aid of the singular value decomposition, makes it possible to use the generalized cross validation for optimizing a regularization parameter. An excellent behavior of the estimator with computational facility is obtained on the Hagr;emission computerized tomography of a toroidal plasma.