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The different techniques for measuring the electron density and temperature on large tokamaks are briefly reviewed, and their different strengths and weaknesses identified. It is pointed out that appropriate comparisons and combinations of measurements made by the different techniques can lead to improved accuracy, early detection of system problems and information which could not otherwise be obtained. Examples are given from measurements made with the JET diagnostics. Finally, some current and likely future developments in electron density and temperature measurements are briefly outlined.

Additional information

Authors: COSTLEY A E, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(90)35 EN (1990) 20 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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