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Modelling of the ICRF induced E x B convection in the scrape-off-layer of ASDEX Upgrade

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Abstract
In magnetic controlled fusion devices, plasma heating with radio-frequency (RF) waves in the ion cyclotron (IC) range of frequency relies on the electric field of the fast wave to heat the plasma. However, the slow wave can be generated parasitically. The electric field of the slow wave can induce large biased plasma potential (DC potential) through sheath rectification. The rapid variation of the rectified potential across the equilibrium magnetic field can cause significant convective transport (E x B drifts) in the scrape-off layer (SOL). In order to understand this phenomenon and reproduce the experiments, 3D realistic simulations are carried out with the 3D edge plasma fluid and kinetic neutral code EMC3-Eirene in ASDEX Upgrade. For this, we have added the prescribed drift terms to the EMC3 equations and verified the 3D code results against the analytical ones in cylindrical geometry. The edge plasma potential derived from the experiments is used to calculate the drift velocities, which are then treated as input fields in the code to obtain the final density distributions. Our simulation results are in good agreement with the experiments.
Keywords
RETARDING-FIELD ANALYZER, ION-CYCLOTRON RANGE, TORE-SUPRA TOKAMAK, IMPURITY PRODUCTION, PLASMA INTERACTIONS, RF SHEATH, EDGE, FREQUENCIES, WAVES, E x B convection, RF sheath, SOL density, 3D simulation, radio-frequency, heating

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MLA
Zhang, Wei et al. “Modelling of the ICRF Induced E x B Convection in the Scrape-off-layer of ASDEX Upgrade.” PLASMA PHYSICS AND CONTROLLED FUSION 58.9 (2016): n. pag. Print.
APA
Zhang, Wei, Feng, Y., Noterdaeme, J.-M., Bobkov, V., Colas, L., Coster, D., Lunt, T., et al. (2016). Modelling of the ICRF induced E x B convection in the scrape-off-layer of ASDEX Upgrade. PLASMA PHYSICS AND CONTROLLED FUSION, 58(9).
Chicago author-date
Zhang, Wei, Y Feng, Jean-Marie Noterdaeme, V Bobkov, L Colas, D Coster, T Lunt, et al. 2016. “Modelling of the ICRF Induced E x B Convection in the Scrape-off-layer of ASDEX Upgrade.” Plasma Physics and Controlled Fusion 58 (9).
Chicago author-date (all authors)
Zhang, Wei, Y Feng, Jean-Marie Noterdaeme, V Bobkov, L Colas, D Coster, T Lunt, R Bilato, J Jacquot, R Ochoukov, D Van Eester, A Krivska, P Jacquet, and L Guimarais. 2016. “Modelling of the ICRF Induced E x B Convection in the Scrape-off-layer of ASDEX Upgrade.” Plasma Physics and Controlled Fusion 58 (9).
Vancouver
1.
Zhang W, Feng Y, Noterdaeme J-M, Bobkov V, Colas L, Coster D, et al. Modelling of the ICRF induced E x B convection in the scrape-off-layer of ASDEX Upgrade. PLASMA PHYSICS AND CONTROLLED FUSION. Bristol: Iop Publishing Ltd; 2016;58(9).
IEEE
[1]
W. Zhang et al., “Modelling of the ICRF induced E x B convection in the scrape-off-layer of ASDEX Upgrade,” PLASMA PHYSICS AND CONTROLLED FUSION, vol. 58, no. 9, 2016.
@article{8517491,
  abstract     = {In magnetic controlled fusion devices, plasma heating with radio-frequency (RF) waves in the ion cyclotron (IC) range of frequency relies on the electric field of the fast wave to heat the plasma. However, the slow wave can be generated parasitically. The electric field of the slow wave can induce large biased plasma potential (DC potential) through sheath rectification. The rapid variation of the rectified potential across the equilibrium magnetic field can cause significant convective transport (E x B drifts) in the scrape-off layer (SOL). In order to understand this phenomenon and reproduce the experiments, 3D realistic simulations are carried out with the 3D edge plasma fluid and kinetic neutral code EMC3-Eirene in ASDEX Upgrade. For this, we have added the prescribed drift terms to the EMC3 equations and verified the 3D code results against the analytical ones in cylindrical geometry. The edge plasma potential derived from the experiments is used to calculate the drift velocities, which are then treated as input fields in the code to obtain the final density distributions. Our simulation results are in good agreement with the experiments.},
  articleno    = {095005},
  author       = {Zhang, Wei and Feng, Y and Noterdaeme, Jean-Marie and Bobkov, V and Colas, L and Coster, D and Lunt, T and Bilato, R and Jacquot, J and Ochoukov, R and Van Eester, D and Krivska, A and Jacquet, P and Guimarais, L},
  issn         = {0741-3335},
  journal      = {PLASMA PHYSICS AND CONTROLLED FUSION},
  keywords     = {RETARDING-FIELD ANALYZER,ION-CYCLOTRON RANGE,TORE-SUPRA TOKAMAK,IMPURITY PRODUCTION,PLASMA INTERACTIONS,RF SHEATH,EDGE,FREQUENCIES,WAVES,E x B convection,RF sheath,SOL density,3D simulation,radio-frequency,heating},
  language     = {eng},
  number       = {9},
  pages        = {12},
  publisher    = {Iop Publishing Ltd},
  title        = {Modelling of the ICRF induced E x B convection in the scrape-off-layer of ASDEX Upgrade},
  url          = {http://dx.doi.org/10.1088/0741-3335/58/9/095005},
  volume       = {58},
  year         = {2016},
}

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