Swift evaluation of electron density profiles obtained by the alkali beam emission spectroscopy technique using linearized reconstruction

A method is presented for the swift reconstruction of electron density profiles measured by the alkali beam emission spectroscopy. It is based on the linearization of the governing rate equations and leads to a direct calculation for obtaining the profiles. The uncertainties of the measurement are i...

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Bibliographic Details
Published in:Review of scientific instruments 2021-11, Vol.92 (11), p.113501-113501
Main Authors: Vécsei, M., Anda, G., Asztalos, O., Dunai, D., Hegedűs, S., Nagy, D., Otte, M., Pokol, G. I., Zoletnik, S.
Format: Article
Language:English
Subjects:
Approximation
Electron density profiles
Emission analysis
Emission spectroscopy
Least squares method
Linearization
Mathematical analysis
Reconstruction
Regularization
Scientific apparatus & instruments
Spectrum analysis
Uncertainty
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Summary:A method is presented for the swift reconstruction of electron density profiles measured by the alkali beam emission spectroscopy. It is based on the linearization of the governing rate equations and leads to a direct calculation for obtaining the profiles. The uncertainties of the measurement are incorporated into the problem through the utilization of Tikhonov regularization and the generalized least squares method. An approximation for the uncertainty of the reconstructed density data is calculated as well. The applicability of the method is tested against both simulated and real experimental results of the W7-X stellarator.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0057158