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Magnetic perturbation experiments on MAST L- and H-mode plasmas using internal coils
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SYSNO ASEP 0366888 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Magnetic perturbation experiments on MAST L- and H-mode plasmas using internal coils Tvůrce(i) Kirk, A. (GB)
Liu, Y.Q. (GB)
Nardon, E. (FR)
Tamain, P. (FR)
Cahyna, Pavel (UFP-V) RID
Chapman, I. (GB)
Denner, P. (GB)
Meyer, H. (GB)
Mordijck, S. (US)
Temple, D. (GB)Zdroj.dok. Plasma Physics and Controlled Fusion. - : Institute of Physics Publishing - ISSN 0741-3335
Roč. 53, č. 6 (2011), 065011-065011Poč.str. 18 s. Forma vydání web - web Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Resonant magnetic perturbations ; L-H transition ; spherical tokamaks ; edge localized modes Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP GAP205/11/2341 GA ČR - Grantová agentura ČR CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000290558900014 DOI 10.1088/0741-3335/53/6/065011 Anotace Experiments have been performed on MAST using internal (n = 3) resonant magnetic perturbation (RMP) coils. The application of the RMPs to L-mode discharges has shown a clear density pump-out when the field line pitch angle at the low-field side of the plasma is sufficiently well aligned with the applied field. The application of the RMPs before the L–H transition increases the power required to achieve H-mode by at least 30%. In type I ELMing H-mode discharges, at a particular value of q95, the ELM frequency can be increased by a factor of 5 by the application of the RMPs. This effect on the ELMs and the L-mode density pump-out is not correlated with the width of the region for which the Chirikov parameter, calculated using the vacuum field, is greater than 1 but may be correlated with the size of the resonant component of the applied field in the pedestal region or with the location of the peak plasma displacement when the plasma response is taken into account. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2012
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