Journal Article Using a priori knowledge for developing bolometric tomography in toroidal devices

佐野, 竜一  ,  Peterson, Byron  ,  Teranishi, Masaru  ,  Iwama, Naofumi  ,  Kobayashi, Masahiro  ,  Mukai, Kiyofumi

87 ( 11 )  , pp.11D440-1 - 11D440-4 , 2016-11 , AIP Publishing
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 Euclideandistance. 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.

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