Počet záznamů: 1
Current density limitation during disruptions due to plasma-sheaths
- 1.
SYSNO ASEP 0558998 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Current density limitation during disruptions due to plasma-sheaths Tvůrce(i) Adámek, Jiří (UFP-V) RID, ORCID
Artola, F. J. (FR)
Loarte, A. (FR)
Matveeva, Ekaterina (UFP-V)
Cavalier, Jordan (UFP-V) RID, ORCID
Pitts, R.A. (FR)
Roccella, R. (FR)
Lehnen, M. (FR)
Havlíček, Josef (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDCelkový počet autorů 11 Číslo článku 086034 Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 62, č. 8 (2022)Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. AT - Rakousko Klíč. slova disruption ; tokamak ; compass ; halo current ; Langmuir probe Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA20-28161S GA ČR - Grantová agentura ČR EF16_019/0000768 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000816877400001 EID SCOPUS 85134174198 DOI 10.1088/1741-4326/ac7656 Anotace The presented experimental study realized in the COMPASS tokamak demonstrates, for the first time, that the current density that flows from the plasma into the vacuum vessel during disruptions is limited by the ion particle flux. Such a limitation shows that, at least in COMPASS, the sheath that forms between the plasma and the first wall dominates the halo current flow. This observation is achieved by measuring simultaneously the ion saturation current with negatively biased Langmuir probes and the halo current with grounded probes to the vacuum vessel. These comparative measurements, which were never performed during disruptions in other machines, directly confirm that the halo current density remains below the ion particle flux in COMPASS. The study also shows, using Mirnov coils measurement, that the total electric current entering the wall grows with the plasma current while the current density obtained by Langmuir probes remains unaffected. This, together with the current density limitation, leads to a novel finding that the halo current width increases with the pre-disruptive plasma current, which limits the local forces. The new findings reported here could also provide potential constraints on the modeling of disruption-induced loads on future reactor scale tokamaks and motivation for further experiments on existing devices. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2023 Elektronická adresa https://iopscience.iop.org/article/10.1088/1741-4326/ac7656
Počet záznamů: 1