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J COSFELD, P DREWS, B BLACKWELL, M JAKUBOWSKI, H NIEMANN, D ZHANG, Y FENG, the Wendelstein -X Team. Numerical estimate of multi-species ion sound speed of Langmuir probe interpretations in the edge plasmas of Wendelstein 7-X[J]. Plasma Science and Technology, 2020, 22(8): 85102-085102. DOI: 10.1088/2058-6272/ab8974
Citation: J COSFELD, P DREWS, B BLACKWELL, M JAKUBOWSKI, H NIEMANN, D ZHANG, Y FENG, the Wendelstein -X Team. Numerical estimate of multi-species ion sound speed of Langmuir probe interpretations in the edge plasmas of Wendelstein 7-X[J]. Plasma Science and Technology, 2020, 22(8): 85102-085102. DOI: 10.1088/2058-6272/ab8974

Numerical estimate of multi-species ion sound speed of Langmuir probe interpretations in the edge plasmas of Wendelstein 7-X

Funds: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under Grant Agreement No. 633053.
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  • Received Date: December 04, 2019
  • Revised Date: April 13, 2020
  • Accepted Date: April 14, 2020
  • The recently modified EMC3-EIRENE code package has been widely applied as an edge-plasma analysis tool and resulted in successful validation against various measured trends seen in stellarator and tokamak plasma boundaries. It has been shown that the code package applied for Wendelstein 7-X (W7-X) discharges in the interpretive mode can assess the impact of impurity effects on the electron density, measured by a set of Langmuir probes. In particular the spatial quantification of impurities and effects from the effective charge state Z eff and effective mass m eff, which are non-trivial to record by diagnostics, were examined. The results showed that earlier assumptions of the effective charge-state distribution and effective mass for reported Langmuir probe measurements must be revised. Subsequently, reprocessing these measurements with code-interpreted spatial profiles of the effective charge state and effective mass led to an overall improved physical consistency.
  • [1]
    Klinger T et al 2017 Plasma Phys. Controlled Fusion 59 014018
    [2]
    Beidler C et al 1990 Fusion Technol. 17 148
    [3]
    Iiyoshi A et al 1990 Fusion Technol. 17 169
    [4]
    Pedersen T S et al 2015 Nucl. Fusion 55 126001
    [5]
    Wolf R C et al 2017 Nucl. Fusion 57 102020
    [6]
    Drews P et al 2017 Nucl. Fusion 57 126020
    [7]
    Nicolai D et al 2017 Fusion Eng. Des. 123 960
    [8]
    Satheeswaran G et al 2017 Fusion Eng. Des. 123 699
    [9]
    Morita S et al 2001 Phys. Scr. 2001 48
    [10]
    Dai S et al 2016 Nucl. Fusion 56 066005
    [11]
    Meister H et al 2003 Rev. Sci. Instrum. 74 4625
    [12]
    Kobayashi M et al 2018 Contrib. Plasma Phys 54 383
    [13]
    Drews P 2019 The role of magnetic topology in the edge plasma performance on W7-X PhD Thesis Heinrich Heine University Düsseldorf
    [14]
    Cosfeld J et al 2019 Nucl. Mater. Energy 18 307
    [15]
    Stangeby P C 2000 The Plasma Boundary of Magnetic Fusion Devices (Boca Raton, FL: CRC Press)
    [16]
    Tokar M Z 1994 Contrib. Plasma Phys. 34 139
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