Počet záznamů: 1
Divertor detachment and reattachment with mixed impurity seeding on ASDEX Upgrade
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SYSNO ASEP 0584061 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Divertor detachment and reattachment with mixed impurity seeding on ASDEX Upgrade Tvůrce(i) Henderson, S. S. (GB)
Bernert, M. (DE)
Brida, D. (DE)
Cavedon, M. (IT)
David, P. (DE)
Dux, R. (DE)
Février, O. (CH)
Järvinen, A. (FI)
Kallenbach, A. (DE)
Komm, Michael (UFP-V) RID, ORCID
McDermott, R. (DE)
O’Mullane, M. (GB)Celkový počet autorů 12 Číslo článku 086024 Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 63, č. 8 (2023)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova divertor detachment ; divertor reattachment ; impurity seeding 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 001023843800001 EID SCOPUS 85165130414 DOI 10.1088/1741-4326/ace2d6 Anotace Using newly developed spectroscopic models to measure the divertor concentration of Ne and Ar, it is shown that the experimental detachment threshold on ASDEX Upgrade with Ar-only and mixtures of Ar+N or Ne+N scales as expected in comparison with an analytical equation derived by Kallenbach et al (2016 Plasma Phys. Control. Fusion 58 045013). However, it is found that Ar radiates more efficiently and Ne less efficiently in the scrape-off layer than the model predicts. By separately increasing the neutral beam injection power and cutting the impurity gas flow, it is shown that the partially detached and strongly detached X-point radiator scenarios reattach in ≈100 ms and ≈250 ms, respectively. The former timescale is set by the core energy confinement time, whereas the latter has an additional delay caused by the time required for the ionisation front to move from the X-point to the target. A simple equation with scalable geometric terms to predict the ionisation front movement time in future machines is proposed. 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/ace2d6
Počet záznamů: 1