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  Overview on stationary and transient divertor heat loads

Herrmann, A. (2002). Overview on stationary and transient divertor heat loads. Plasma Physics and Controlled Fusion, 44(6), 883-903.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40F9-B Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40FA-9
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 Urheber:
Herrmann, A.1, Autor           
Affiliations:
1Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              

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 Zusammenfassung: The divertor concept and the divertor materials envisaged for ITER FEAT restrict the maximum values of the stationary and transient heat fluxes. The maximum stationary heat flux is limited by the active cooling structure. The limit for transient events is given by the maximum tolerable surface temperature. This paper will review different options for divertor heat flux reduction. Proper geometric orientation of the divertor targets reduces the heat flux to the target plates at most by a factor of 60 relative to the parallel heat flux determined by upstream transport. The radiation capability of closed divertor configurations is doubled compared to open configurations. A further reduction of maximum heat load can be achieved by increasing the wetted area in double-null plasma configurations. The energy transported by transient events (type I ELMS) is up to 30% of the total energy deposited in the divertor. The heat flux profile during ELMS is not significantly broadened and is comparable to the profile between ELMS. The duration of the energy deposition varies with edge plasma parameters between 0.1 and 1 ms. The expected transient heat flux for ITER FEAT conditions is above the tolerable value. This requires the further development of operation scenarios with tolerable ELMS (e.g. type 11) preserving the high energy confinement of type I ELM scenarios.

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Sprache(n): eng - English
 Datum: 2002-06
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 20515
ISI: 000177105000019
 Art des Abschluß: -

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Titel: Plasma Physics and Controlled Fusion
  Alternativer Titel : Plasma Phys. Control. Fusion
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 44 (6) Artikelnummer: - Start- / Endseite: 883 - 903 Identifikator: ISSN: 0741-3335