The Novel Reconstruction Method for Laser Interferometer with Local Measurement

SUMMARY We have developed a novel reconstruction method for a laser interferometer to determine the radial electron density profile in a cylindrical plasma vessel under an axial symmetrical assumption with spline interpolation. This method can extend the reconstructible area out of the line‐integrat...

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Bibliographic Details
Published in:Electronics and communications in Japan 2017-11, Vol.100 (11), p.23-30
Main Authors: KADOWAKI, KAZUTAKE, ISHIDA, SHUNSUKE, ONO, YASUSHI
Format: Article
Language:English
Subjects:
Basis functions
Computer simulation
Cylindrical plasmas
Density measurement
Electron density
Error detection
laser interferometer
Lasers
Monte Carlo simulation
Plasma
profile reconstruction
Reconstruction
Sensitivity analysis
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Summary:SUMMARY We have developed a novel reconstruction method for a laser interferometer to determine the radial electron density profile in a cylindrical plasma vessel under an axial symmetrical assumption with spline interpolation. This method can extend the reconstructible area out of the line‐integrated density measurement area by using the additional local measurement data. Although both the ordinary Abel inversion and the basis function expansion method cannot reconstruct well out of the measurement area, the new method can reconstruct distributions even with nonzero electron density on the wall. In order to confirm the validity of the method, the error sensitivity is evaluated by Monte Carlo simulation.
ISSN:1942-9533
1942-9541
DOI:10.1002/ecj.11991