Počet záznamů: 1
Temporal characteristics of ELMs on the COMPASS divertor
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SYSNO ASEP 0574103 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Temporal characteristics of ELMs on the COMPASS divertor Tvůrce(i) Adámek, Jiří (UFP-V) RID, ORCID
Cavalier, Jordan (UFP-V) RID, ORCID
Tskhakaya, David (UFP-V) ORCID
Csillag, B. (HU)
Cinnirella, L. (DE)
Lips, J. (DE)
Lopez-Rodriguez, D. (BE)
Sosa, D. (ES)
Medina, D. (ES)
Vondráček, Petr (UFP-V) RID, ORCID
Kripner, Lukáš (UFP-V) ORCID
Komm, Michael (UFP-V) RID, ORCID
Šos, Miroslav (UFP-V) ORCID
Lindl, H. (DE)Celkový počet autorů 14 Číslo článku 086009 Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 63, č. 8 (2023)Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova compass ; divertor ; elm ; temporal characteristics ; tokamak Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP EF16_013/0001551 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA20-28161S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 001011391800001 EID SCOPUS 85163375448 DOI 10.1088/1741-4326/acdd10 Anotace The presented work shows a systematic study of the temporal characteristics of ELM events on the COMPASS divertor obtained with high temporal resolution probe measurements (∼1 μs). The resulting temporal evolution of the total ELM power on the outer target provides the values of rise (τ rise) and decay (τ decay) times for each single ELM event. It has been found that τ rise values are in the range of about 50 μs-100 μs. These values are comparable to the time of the ELM parallel propagation (τ ||) given by the sound speed and the connection length between the outer midplane and the outboard divertor. This comparison indicates that the magnetic field lines in the SOL region are not significantly ergodized during the pedestal crash on COMPASS. It also implies that the peak ELM energy fluence on the outboard divertor is dominated by the ELM parallel transport, which is confirmed by a good agreement with model prediction. In addition, the values of the ratio of τ decay and τ rise for each ELM event fit very well to the boundaries 1.5 < τ decay/τ rise < 4, as already shown on JET as well as on the HL-2A tokamak, using IR measurements. The ratio does not show any clear dependence on the relative ELM energy or line averaged electron density. It was also found that the ELM energy fluence decay length (λϵmid) is clearly linked to this ratio. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2024 Elektronická adresa https://iopscience.iop.org/article/10.1088/1741-4326/acdd10
Počet záznamů: 1