Comment on determination of electron temperature from Langmuir probe data in tokamak edge plasma

Langmuir probe measurements of electron temperature in a plasma in the limiter shadow of a tokamak are presented together with a method of probe data analysis which takes into account the influence of the ion current vs voltage dependence on the determination of electron temperature. The method is based on the transformation of a single into a double probe characteristic. Values of electron temperature calculated using this method are compared with the values estimated from single probe-characteristic data. (author)