Počet záznamů: 1
The role of the plasma current in turbulence decrease during lower hybrid current drive
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SYSNO ASEP 0509309 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The role of the plasma current in turbulence decrease during lower hybrid current drive Tvůrce(i) Antar, G. (LB)
Ekedahl, A. (FR)
Goniche, M. (FR)
Asghar, A. (LB)
Žáček, František (UFP-V) RIDCelkový počet autorů 5 Číslo článku 032307 Zdroj.dok. Physics of Plasmas - ISSN 1070-664X
Roč. 24, č. 3 (2017)Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova scrape-off layer ; transport ; front Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000397872500032 EID SCOPUS 85016139828 DOI 10.1063/1.4978486 Anotace The interaction of radio frequency (RF) waves with edge turbulence has resurfaced after the results obtained on many tokamaks showing that edge turbulence decreases when the ion cyclotron frequency heating (ICRH) is switched on. Using the lower hybrid (LH) waves to drive current into tokamak plasmas, this issue presented contradicting results with some tokamaks (FTU & HT-7) showing a net decrease, similar to the ICRH results, and others (Tore Supra) did not. In this article, these apparent discrepancies among tokamaks and RF wave frequencies are removed. It is found that turbulence large-scale structures in the scrape-off layer decrease at high enough plasma currents (I-p) on the Tore Supra tokamak. We distinguish three regimes: At low I-p's, no modification is detected with statistical properties of turbulence similar to ohmic plasmas even with P-LH reaching 4.8MW. At moderate plasma currents, turbulence properties are modified only at a high LH power. At high plasma currents, turbulent large scales are reduced to values smaller than 1 cm, and this is accompanied by a net decrease in the level of turbulence of about 30% even with a moderate LH power. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2020 Elektronická adresa https://aip.scitation.org/doi/10.1063/1.4978486
Počet záznamů: 1