Effect of the resonant magnetic perturbation on the plasma parameters in COMPASS tokamak’s divertor region

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00489646" target="_blank" >RIV/61389021:_____/18:00489646 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1742-6596/982/1/012001" target="_blank" >http://dx.doi.org/10.1088/1742-6596/982/1/012001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/982/1/012001" target="_blank" >10.1088/1742-6596/982/1/012001</a>

Result language
angličtina
Original language name
Effect of the resonant magnetic perturbation on the plasma parameters in COMPASS tokamak’s divertor region
Original language description
The effect of RMP on the L-mode plasma parameters in the divertor region of the COMPASS tokamak was studied using the array of 39 Langmuir probes embedded into the divertor target. The current-voltage (IV) probe characteristics were processed by the first-derivative probe technique to obtain the plasma potential and the electron energy distribution function (EEDF) which was approximated by a bi-Maxwellian EEDF with a low-energy (4-6 eV) fraction and a high-energy (11-35 eV) one, the both factions having similar electron density. Clear splitting was observed during the RMP pulse in the low-field-side scrape-off-layer profiles of the floating potential Ufl and the ion saturation current density Jsat. The negative peaks of Ufl induced by RMP spatially overlaps with the local minima of Jsat (and ne) rather than with its local maxima which is partly caused by the spatial variation of the plasma potential and partly by the changed shape of the EEDF. The effective temperature of the whole EEDF is not correlated with the negative peaks of Ufl, and the profile of the parallel power flux density shows secondary maxima due to RMP which mimic those of Jsat.
Czech name
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Czech description
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Project
<a href="/en/project/LM2015045" target="_blank" >LM2015045: COMPASS – Tokamak for Thermonuclear Fusion Research</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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