Počet záznamů: 1
Spatiotemporal analysis of the runaway distribution function from synchrotron images in an ASDEX Upgrade disruption
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SYSNO ASEP 0543173 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Spatiotemporal analysis of the runaway distribution function from synchrotron images in an ASDEX Upgrade disruption Tvůrce(i) Hoppe, M. (SE)
Hesslow, L. (SE)
Embreus, O. (SE)
Unnerfelt, L. (SE)
Papp, G. (DE)
Pusztai, I. (SE)
Fülöp, T. (SE)
Lexell, O. (SE)
Lunt, T. (DE)
Tomešová, Eva (UFP-V) ORCID
McCarthy, P.J. (IE)
Pautasso, G. (DE)
Pokol, G.I. (HU)
Por, G. (HU)
Svensson, P. (SE)Celkový počet autorů 15 Číslo článku 855870102 Zdroj.dok. Journal of Plasma Physics. - : Cambridge University Press - ISSN 0022-3778
Roč. 87, č. 1 (2020)Poč.str. 25 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova fusion plasma ; runaway electrons Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000609440100001 EID SCOPUS 85092326223 DOI 10.1017/S002237782000152X Anotace Synchrotron radiation images from runaway electrons (REs) in an ASDEX Upgrade discharge disrupted by argon injection are analysed using the synchrotron diagnostic tool Soft and coupled fluid-kinetic simulations. We show that the evolution of the runaway distribution is well described by an initial hot-tail seed population, which is accelerated to energies between 25-50 MeV during the current quench, together with an avalanche runaway tail which has an exponentially decreasing energy spectrum. We find that, although the avalanche component carries the vast majority of the current, it is the high-energy seed remnant that dominates synchrotron emission. With insights from the fluid-kinetic simulations, an analytic model for the evolution of the runaway seed component is developed and used to reconstruct the radial density profile of the RE beam. The analysis shows that the observed change of the synchrotron pattern from circular to crescent shape is caused by a rapid redistribution of the radial profile of the runaway density. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2022 Elektronická adresa https://www.cambridge.org/core/services/aop-cambridge-core/content/view/D6EB3D8C8555EE96017FAA5A10705254/S002237782000152Xa.pdf
Počet záznamů: 1