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EDGE2D-EIRENE simulations of the influence of isotope effects and anomalous transport coefficients on near scrape-off layer radial electric field

JET Contributors; Chankin, A., V; Corrigan, G.; Maggi, C. F.; Abduallev, S.; Abhangi, M.; Abreu, P.; Afzal, M.; Aggarwal, K. M.; Ahlgren, T.; Ahn, J. H.; Aho-Mantila, L.; Aiba, N.; Airila, M.; Albanese, R.; Aldred, V.; Alegre, D.; Alessi, E.; Aleynikov, P.; ... mehr


EDGE2D-EIRENE (the ‘code’) simulations show that radial electric field, E$_{r}$, in the near scrape-off layer (SOL) of tokamaks can have large variations leading to a strong local E×B shear greatly exceeding that in the core region. This was pointed out in simulations of JET plasmas with varying divertor geometry, where the magnetic configuration with larger predicted near SOL E$_{r}$ was found to have lower H-mode power threshold, suggesting that turbulence suppression in the SOL by local E×B shear can be a player in the L–H transition physics (Delabie et al 2015 42nd EPS Conf. On Plasma Physics (Lisbon, Portugal, 22–26 June 2015) paper O3.113 ( EPS2015PAP/pdf/O3.113.pdf), Chankin et al 2017 Nucl. Mater. Energy 12 273). Further code modeling of JET plasmas by changing hydrogen isotopes (H–D–T) showed that the magnitude of the near SOL E$_{r}$ is lower in H cases in which the H-mode threshold power is higher (Chankin et al 2017 Plasma Phys. Control. Fusion 59 045012). From the experiment it is also known that hydrogen plasmas have poorer particle and energy confinement than deuterium plasmas, consistent with the code simulation results showing larger particle diffusion coefficients at the plasma edge, including SOL, in hydrogen plasmas (Maggi et al 2018 Plasma Phys. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000119721
DOI: 10.1088/1361-6587/ab1629
Zitationen: 11
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Thermofluidik (IATF)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.05.2019
Sprache Englisch
Identifikator ISSN: 0032-1028, 0368-3281, 0741-3335, 1361-6587, 1879-2979, 2057-7648
KITopen-ID: 1000119721
Erschienen in Plasma physics and controlled fusion
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 61
Heft 7
Seiten Art. Nr.: 075010
Schlagwörter plasma, divertor, scrape-off layer, EDGE2D-EIRENE
Nachgewiesen in Scopus
Web of Science
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