TY - JOUR
T1 - Fast algorithm for tomographic reconstruction for plasma emission
AU - Yamasaki, Kotaro
AU - Fujisawa, Akihide
AU - Nagashima, Yoshihiko
AU - Inagaki, Shigeru
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Nos. JP23246162, JP16K13921, JP23360409, JP17H06089, NIFS17KOCH002 and in part by the Collaborative Research Program of Research Institute for Applied Mechanics, Kyushu University
Publisher Copyright:
© 2017 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2017
Y1 - 2017
N2 - Temporal evolution of two dimensional image of plasma emission has been obtained using a reconstruction algorithm called Maximum Likelihood-Expectation Maximization (MLEM), with a tomography system in a linear cylindrical plasma. The calculation of tomography images for the whole plasma duration needs parallel computation due to the iteration processes of MLEM. However, faster and simpler tomography algorithm giving a consistent image with MLEM should be desirable for monitoring the emission profile and quick analysis between shots. This paper proposes such a new algorithm of a modified Tikhonov regularization with introducing a weight matrix, termed here direct matrix reconstruction (DMR).
AB - Temporal evolution of two dimensional image of plasma emission has been obtained using a reconstruction algorithm called Maximum Likelihood-Expectation Maximization (MLEM), with a tomography system in a linear cylindrical plasma. The calculation of tomography images for the whole plasma duration needs parallel computation due to the iteration processes of MLEM. However, faster and simpler tomography algorithm giving a consistent image with MLEM should be desirable for monitoring the emission profile and quick analysis between shots. This paper proposes such a new algorithm of a modified Tikhonov regularization with introducing a weight matrix, termed here direct matrix reconstruction (DMR).
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U2 - 10.1585/pfr.12.1201045
DO - 10.1585/pfr.12.1201045
M3 - Article
AN - SCOPUS:85049522285
VL - 12
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
SN - 1880-6821
M1 - 1201045
ER -