Density measurement of a magnetised plasma column using a resonant cavity technique
A study of the application of high order TM(omo) modes of a cylindrical cavity to the measurement of the density of a magnetised plasma column is presented. It is shown theoretically that judiciously chosen high order modes have the potential advantages of both a wide operational range of densities, and a wide range for which a simple perturbation theory is valid. Furthermore, an experiment is described which shows that the TM(o6o) mode can be excited with a sufficiently high Q value to allow accurate determination of the resonant frequencies, and hence plasma density. Favourable comparison between densities in the range 1.0 E10 to 1.0 E12/cm3 measured by means of the resonant cavity technique and microwave interferometry is presented.
Bibliographic Reference: Report: LRP 365/88 EN (1988)
Availability: Available from Confédération Suisse, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, 21 avenue des Bains, 1007 Lausanne (CH)
Record Number: 198911016 / Last updated on: 1994-12-01
Original language: en
Available languages: en