[Table of Contents]

Plasma and Fusion Research

Volume 6, 2406120 (2011)

Regular Articles

Investigation of the Noise Effect on Tomographic Reconstructions for a Tangentially Viewing Vacuum Ultraviolet Imaging Diagnostic
Tingfeng MING1), Satoshi OHDACHI1,2), Yasuhiro SUZUKI1,2) and LHD Experiment Group2)
The Graduate University for Advanced Studies, Toki 509-5292, Japan
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 20 December 2010 / Accepted 3 June 2011 / Published 11 August 2011)


Tomographic reconstruction for a tangentially viewing two-dimensional (2D) imaging system is studied. A method to calculate the geometry matrix in 2D tomography is introduced. An algorithm based on a Phillips-Tikhonov (P-T) type regularization method is investigated, and numerical tests using the P-T method are conducted with both tokamak and Heliotron configurations. The numerical tests show that the P-T method is not sensitive to the added noise levels and the emission profiles with higher mode numbers can be reconstructed with adequate resolution. The results indicate that this method is suitable for 2D tomographic reconstruction for a tangentially viewing vacuum ultraviolet telescope system.


tomography, reconstruction, VUV, GCV, LHD

DOI: 10.1585/pfr.6.2406120


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This paper may be cited as follows:

Tingfeng MING, Satoshi OHDACHI, Yasuhiro SUZUKI and LHD Experiment Group, Plasma Fusion Res. 6, 2406120 (2011).