Numerical evaluation of heat flux and surface temperature on a misaligned JET divertor W lamella during ELMs

0435425 - ÚFP 2015 RIV AT eng J - Článek v odborném periodiku
Dejarnac, Renaud - Podolník, Aleš - Komm, Michael - Arnoux, G. - Coenen, J.W. - Devaux, S. - Frassinetti, L. - Gunn, J. P. - Matthews, G. F. - Pitts, R.A. … celkem 11 autorů
Numerical evaluation of heat flux and surface temperature on a misaligned JET divertor W lamella during ELMs.
Nuclear Fusion. Roč. 54, č. 12 (2014), s. 123011-123011. ISSN 0029-5515. E-ISSN 1741-4326
Institucionální podpora: RVO:61389021
Klíčová slova: PIC simulations * power flux * plasma–wall interactions * JET * divertor
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 3.062, rok: 2014
http://iopscience.iop.org/0029-5515/54/12/123011/pdf/0029-5515_54_12_123011.pdf

A series of experiments has been performed on JET to investigate the dynamics of transient melting due to edge localized modes (ELMs). The experiment employs a deliberately misaligned lamella in one module of the JET bulk tungsten outer divertor, allowing the combination of stationary power flux and ELMs to transiently melt the misaligned edge. During the design of the experiment a number of calculations were performed using 2D particle-in-cell simulations and a heat transfer code to investigate the influence on the deposited power flux of finite Larmor radius effects associated with the energetic ELM ions. This has been performed using parameter scans inside a range of pedestal temperatures and densities to scope different experimentally expected ELM energies. On the one hand,we observe optimistic results,with smoothing of the heat flux due to the Larmor gyration on the protruding side of the lamella which sees the direct parallel flux—the deposited power tends to be lower
Trvalý link: http://hdl.handle.net/11104/0239302