title: Using a priori knowledge for developing bolometric tomography in toroidal devices.
abstract: In tomographic imaging of magnetically confined toroidal plasmas, a countermeasure against missing observation has been studied in terms of the adoption of prior information based on modelled plasma profiles. The Tikhonov regularization for image reconstruction is extended by the use of the Euclidean distance. A procedure of model fitting is designed in order to adaptively generate the reference image. The new method is tested on a typical example of ill-conditioned tomography, that is, the three-dimensional imaging-bolometer tomography in the large helical device. It has been found that the new method is useful for diminishing artifacts and thus for better recognizing the radiation structure of plasma.
authors.affiliation: Naka Fusion Institute, National Institutes for Quantum and Radiological Science and Technology, Naka 311-0193, Japan.
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Sano
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan.
authors.forename: Byron J
authors.initials: BJ
authors.lastname: Peterson
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan.
authors.forename: Kiyofumi
authors.initials: K
authors.lastname: Mukai
authors.affiliation: Hiroshima Institute of Technology, 2-1-1, Miyake, Saeki-ku, Hiroshima 731-5193 Japan.
authors.forename: Masaru
authors.initials: M
authors.lastname: Teranishi
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan.
authors.forename: Naofumi
authors.initials: N
authors.lastname: Iwama
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kobayashi