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Divertor Langmuir Probe Measurements in JET
Author(s) -
Loarte A.,
Chankin A.,
Clement S.,
Davies S. J.,
Günther K.,
Lingertat J.,
Maggi C. F.,
Matthews G. F.,
Morgan P. D.,
Stamp M. F.,
Monk R. D.,
Guo H. Y.,
Tabasso A.
Publication year - 1996
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.19960360107
Subject(s) - divertor , langmuir probe , electron temperature , plasma diagnostics , jet (fluid) , electron density , plasma , atomic physics , materials science , saturation current , ion , electron , physics , tokamak , nuclear physics , mechanics , voltage , quantum mechanics
In this paper, results from the array of fixed Langmuir probes in the JET Mark I divertor are presented. During low density discharges there is good agreement between single and triple probes. At higher density, near the onset of divertor detachment, very low values of the electron to ion saturation current (even < 1) are observed which results in an overestimation of the electron temperature, particularly by the triple probe. Alternative methods of probe interpretation are applied and comparisons carried out with independent measurements. The consistency of probe measurements during H‐mode discharges are also briefly discussed.