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Abstract

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.

Additional information

Authors: PARIS P J, Centre de Recherches en Physique des Plasmas, École Polytechnique Fédérale de Lausanne, 21 avenue des Bains, CH-1007 Lausanne (CH);TRAN M Q, Centre de Recherches en Physique des Plasmas, École Polytechnique Fédérale de Lausanne, 21 avenue des Bains, CH-1007 Lausanne (CH);SAWLEY M L, I.M.H.E.F.-E.P.F.L. ME, Ecublens, CH-1015 Lausanne (CH);VOSER K, Organisation Zoller SA, 1800 Vevey (CH)
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
Category: PUBLICATION
Original language: en
Available languages: en