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| Hauptseite > Publikationsdatenbank > Numerical estimate of multi-species ion sound speed of Langmuir probe interpretations in the edge plasmas of Wendelstein 7-X |
| Hauptseite > Publikationsdatenbank > Numerical estimate of multi-species ion sound speed of Langmuir probe interpretations in the edge plasmas of Wendelstein 7-X |
| Journal Article | FZJ-2021-02671 |
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2020
IOP
Bristol
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Please use a persistent id in citations: http://hdl.handle.net/2128/28138 doi:10.1088/2058-6272/ab8974
Abstract: The recently modified EMC3-EIRENE code package has been widely applied as an edge-plasmaanalysis tool and resulted in successful validation against various measured trends seen instellarator and tokamak plasma boundaries. It has been shown that the code package applied forWendelstein 7-X (W7-X) discharges in the interpretive mode can assess the impact of impurityeffects on the electron density, measured by a set of Langmuir probes. In particular the spatialquantification of impurities and effects from the effective charge state Zeff and effective massmeff, which are non-trivial to record by diagnostics, were examined. The results showed thatearlier assumptions of the effective charge-state distribution and effective mass for reportedLangmuir probe measurements must be revised. Subsequently, reprocessing these measurementswith code-interpreted spatial profiles of the effective charge state and effective mass led to anoverall improved physical consistency.
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