This title appears in the Scientific Report :
2018
Please use the identifier:
http://hdl.handle.net/2128/19572 in citations.
Numerical estimate of themulti-species ion sound speed of Langmuir probe interpretations inedge plasmas of Wendelstein 7-X
Numerical estimate of themulti-species ion sound speed of Langmuir probe interpretations inedge plasmas of Wendelstein 7-X
The three-dimensional Monte Carlo transport code package EMC3-EIRENE has been widely applied as edge plasma analysis tool for more than a decadenow, resulting in successful validation applications against various measured trendsseen in stellerator plasma boundaries. Here we apply this code package f...
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Personal Name(s): | Cosfeld, J. |
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Rack, M. / Reiter, D. / Drews, P. / Blackwell, B. / Jakubowski, M. / Niemann, H. / Zhang, D. / Feng, Y. / Wendelstein 7-x Team | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2018
|
Physical Description: |
20 p. |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte des Forschungszentrums Jülich
4414 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
The three-dimensional Monte Carlo transport code package EMC3-EIRENE has been widely applied as edge plasma analysis tool for more than a decadenow, resulting in successful validation applications against various measured trendsseen in stellerator plasma boundaries. Here we apply this code package for Wendelstein7-X discharges in interpretive mode. We are able to clearly identify (and correct)an earlier experimental hardware probe misalignment, which had led to an otherwiseunresolvable inconsistency between experimentally constrained EMC3-EIRENE simulationsand mid-plane Langmuir probe measurements.Today W7-X plasma discharges still lack diagnostics to directly measure some importantedge plasma properties, such as the spatial distribution of the effective chargestate. Here EMC3-EIRENE simulations are applied in an iterative process to reconstructthese computationally. Earlier assumptions on the effective charge state distributionfor reported Langmuir probe measurement have to be revised. Re-processingof up- and down-stream Langmuir probe measurements with code interpreted spatialprofiles of the effective charge state now lead to overall improved physical consistency. |