A two-channel Fabry-Perot interferometer for the measurement of Doppler temperatures.
The true width of a doppler-broadened emission line may easily be determined by measuring the peak and wing intensities of the fringe pattern. The ratio of these intensities as a function of the half-width of the line and of various instrumental parameters is discussed. This method has been used to study the ion temperature of a pulsed plasma.
Platz
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Groupe de Recherches de 'Association EURATOM-CEA sur la Fusion, 92 Fontenay-aux-Roses, France.