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This paper reviews progress in the understanding and application of electrical probes for the diagnosis of tokamak edge plasmas. Recent results from flush mounted Langmuir probes in divertor plates are used to highlight the problem areas of non-saturation of the ion current and low electron to ion saturation current ratios. The importance of measuring the parallel flow velocity in the plasma edge is highlighted and recent developments in theories for interpreting Mach probes are discussed. Progress in the application of advanced-electrical probes such as retarding field analysers and mass spectrometers to the tokamak boundary is reviewed in the context of ion diagnostics.

Additional information

Authors: MATTHEWS G F, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(94)15 EN (1994) 51 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199410609 / Last updated on: 1994-11-28
Original language: en
Available languages: en