Abstract
A partial analysis has been made of the effects of fluctuations in a plasma on the data obtained by conventional use of Langmuir probes. Consideration has been given to effects of periodic fluctuations of electron temperature, random current and space-potential, supposed independent of probe potential. For a wide range of conditions, the values of electron temperature obtained will be correct, but values of electron concentration underestimated. Experiments are described to check part of the theory, and the bearing of the experimental and theoretical results obtained on the probe analysis of discharges in which there are plasma electron oscillations is discussed briefly.