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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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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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description	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.
doi_str_mv	10.1063/5.0057158
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source	American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP Journals (American Institute of Physics)
subjects	Approximation Electron density profiles Emission analysis Emission spectroscopy Least squares method Linearization Mathematical analysis Reconstruction Regularization Scientific apparatus & instruments Spectrum analysis Uncertainty
title	Swift evaluation of electron density profiles obtained by the alkali beam emission spectroscopy technique using linearized reconstruction
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