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Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions
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SYSNO ASEP 0531034 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Study of secondary instability of precursor magnetic island in COMPASS density limit disruptions Author(s) Salzedas, F. (PT)
Shah, S. I.W. (PK)
Havlíček, Josef (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Háček, Pavel (UFP-V) RID, ORCID
Varju, Jozef (UFP-V) ORCID
Havránek, Aleš (UFP-V) ORCID
Pánek, Radomír (UFP-V) RID
Silva, C. (PT)Number of authors 9 Article number 022515 Source Title Physics of Plasmas - ISSN 1070-664X
Roč. 27, č. 2 (2020)Number of pages 6 s. Language eng - English Country US - United States Keywords COMPASS ; magnetic island Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFP-V - RVO:61389021 UT WOS 000519635100002 EID SCOPUS 85081113431 DOI 10.1063/1.5123677 Annotation A systematic study of COMPASS density limit disruptions (DLDs) was carried out to analyze the relation between the precursor magnetic island and its secondary instability (SI). In all of these plasmas, the SI was always found present at the onset of energy confinement erosion. The duration of this erosion was shorter for precursor quasi-locked island than for rotating island, and the larger the island amplitude, the shorter the duration. It was also found, at the onset of the erosion of energy confinement, an inverse relation between the magnetic island amplitude and its rotation frequency, showing that erosion can start at different values of precursor island amplitude, depending on what is its rotation frequency. DLDs occur either with smaller precursor island rotating faster or larger island rotating slower (quasi-locked). Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://aip.scitation.org/doi/10.1063/1.5123677
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