EFFECT OF THE RESONANT MAGNETIC PERTURBATION ON THE PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK (IWSSPP 2016)

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

EFFECT OF THE RESONANT MAGNETIC PERTURBATION ON THE PLASMA PARAMETERS IN DIVERTOR REGION OF THE COMPASS TOKAMAK (IWSSPP 2016)

Original language description

Předneseno na: 7th International Workshop and Summer School on Plasma Physics (IWSSPP 2016), Kiten,26.06.-02.07.2016,nThis work discusses the application of Resonant Magnetic Perturbations (RMPs) in the COMPASS tokamak in Ohmic D-shaped discharges, with toroidal magnetic field BT = 1.15 T, plasma current Ip = 170 kA and line-average electron density ne = 51019 m3. In order to study the effect of RMPs on the plasma parameters in the divertor region with high spatial resolution, the strike-points were swept radially across 39 Langmuir divertor probes during a shot. The current-voltage characteristics data were processed using the novel first-derivative probe technique which allows one to evaluate the plasma potential and the real electron energy distribution function (EEDF), respectively the electron temperatures and densities. It has been found that in the vicinity of the inner and outer strike points of the divertor, that EEDF is bi-Maxwellian, with a low-energy electron population (4 - 6 eV) and a higher energy one (10 - 30 eV).nWhen applying RMPs with alternate directions of the current in the external coils, we observed splitting of strike points characterized by change of spatial profiles of the floating potential and the ion saturation current at the outer strike pointn

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů