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Some opportunities for measuring n(e), T(e), T(i), Z(eff) and background plasma drift velocities in the edge region of magnetic confinement devices based on impurity injection are described. The technique would be based on spatially resolving the distributions of successive charge states and the measurement of (Doppler) temperatures of the states. Some simple analytic relations can be obtained to permit the extraction of first order estimates of the plasma parameters, one at a time, from the experimental data. In practice, however, it will generally be necessary to use an impurity transport code with the input plasma parameters varied, in order to obtain a best fit to all the available experimental data simultaneously.

Additional information

Authors: STANGEBY P C, JET Joint Undertaking, Abingdon, Oxon. (GB);ELDER J D, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(91)09 EN (1991) 29 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199111622 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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