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The inference of the electron temperature Tₑ from the Landau cutoff of backscattered Raman spectra is tested by simultaneous Thomson scattering temperature measurements and compared with results of two-dimensional hydrodynamic computer simulations. If the threshold condition is calculated by using a detailed modeling of the instability, then all three indications of Tₑ agree. In contrast, the often-used estimate of kλDe{}0.3 for sizable damping typically overestimates the electron temperature by a factor of 1.5 to 2 in this case.
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Fontaine et al. (1992) studied this question.
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