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  Edge transport and its interconnection with main chamber recycling in ASDEX Upgrade

Kallenbach, A., Dux, R., Gafert, J., Haas, G., Horton, L. D., Jakobi, M., et al. (2003). Edge transport and its interconnection with main chamber recycling in ASDEX Upgrade. Nuclear Fusion, 43(7), 573-578. doi:10.1088/0029-5515/43/7/310.

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Kallenbach, A.1, Autor           
Dux, R.1, Autor           
Gafert, J.2, Autor           
Haas, G.3, 4, Autor           
Horton, L. D.3, Autor           
Jakobi, M.5, Autor           
Kurzan, B.5, Autor           
Müller, H. W.3, Autor           
Neu, R.1, Autor           
Neuhauser, J.2, Autor           
Pugno, R.2, Autor           
Pütterich, T.1, Autor           
Rohde, V.3, Autor           
Sandmann, W.3, Autor           
Yoon, S.-W.2, Autor           
ASDEX Upgrade Team6, Autor
Affiliations:
1Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              
2External Organizations, ou_persistent22              
3Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
4Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856318              
5Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              
6Max Planck Society, ou_persistent13              

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 Zusammenfassung: Edge profiles of electron temperature and density are measured in ASDEX Upgrade with a high spatial resolution of 2–3 mm with Thomson scattering. In the region of the edge transport barrier in ELMy H-mode, the gradient lengths of Te and ne are found closely coupled, with the temperature decay length two times shorter than the density decay length corresponding to ηe ≈ 2. The ηe constraint allows us to calculate the electron temperature and density profiles from the pressure profile if the density and temperature values are known at one spatial position. The edge density in the region of the barrier foot is closely coupled to the main chamber recycling, with no strong dependence on other parameters. In contrast, the density rise from the outer barrier foot to the pedestal exhibits pronounced dependence on plasma current and shaping, indicating quite different mechanisms determining the absolute density and its gradient.

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Sprache(n): eng - English
 Datum: 2003
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Art des Abschluß: -

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Titel: Nuclear Fusion
  Alternativer Titel : Nucl. Fusion
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: Copyright © Institute of Physics and IOP Publishing Limited 2003
Seiten: - Band / Heft: 43 (7) Artikelnummer: - Start- / Endseite: 573 - 578 Identifikator: -