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Proceedings Paper

Efficiency of determining electron temperature and concentration in thermonuclear plasmas by Thomson scattering lidar
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Paper Abstract

The rms errors are investigated, analytically and by computer simulations, in the determination by Thomson scattering lidar of the electron temperature Te and concentration ne and the pressure in fusion plasmas, using fitting approach. Unlike previous such studies, we have taken into account the correlation between the fluctuations of the statistical estimates of the electron temperature and concentration. Analytical expressions of the errors as functions of the electron temperature are derived for the cases of log-linear and non-linear fitting procedures at a high measurement signal-tonoise ratio. Also performed are computer simulations of the nonlinear fitting procedure, which confirm the analytical results. It is shown that in the log-linear fitting procedure the correlation between the estimates of the electron temperature and concentration leads to an increase in the rms errors in determining the concentration and the pressure compared to the case of no correlation. In the non-linear fitting procedure, the same correlation increases the ne– measurement error while influencing only slightly the error in the determination of the pressure.

Paper Details

Date Published: 15 March 2013
PDF: 10 pages
Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 877012 (15 March 2013); doi: 10.1117/12.2014282
Show Author Affiliations
Tanja N. Dreischuh, Institute of Electronics (Bulgaria)
Ljuan L. Gurdev, Institute of Electronics (Bulgaria)
Dimitar V. Stoyanov, Institute of Electronics (Bulgaria)


Published in SPIE Proceedings Vol. 8770:
17th International School on Quantum Electronics: Laser Physics and Applications
Tanja N. Dreischuh; Albena T. Daskalova, Editor(s)

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