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Abstract

With the exception of simple Langmuir probes, all other probes used to diagnose the scrape-off plasma behind the limiter radius or separatrix in tokamaks are usually sufficiently large that they disturb the plasma they are measuring. A theory is presented for recovering the undisturbed plasma parameters from those measured by a large probe in the scrape-off plasma. It is concluded that probe interpretation is facilitated by the use of a large back stop behind the probe which acts effectively as a limiter, i.e. that probe interpretation is most straightforward when the probe is located just in front of, and facing away from, a limiter or divertor target plate.

Additional information

Authors: STANGEBY P C CULHAM LABORATORY, ABINGDON, OXON (UK), CULHAM LABORATORY, ABINGDON, OXON (UK)
Bibliographic Reference: WRITE TO THE LIBRARIAN UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CUL 3008, 1982
Record Number: 1989123060400 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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