Turbulence and anomalous transport in magnetized plasmas : Hints from the reversed field pinch configuration

• The properties of plasma turbulence in the outer region of the Reversed Field Pinch experiments RFX and EXTRAP-T2R are reviewed. The statistical properties of fluctuations in the range of scales relevant for transport are presented. The observation of coherent structures emerging from the background turbulence and their interpretation in terms of vortices is reported. The interplay between these structures and the mean ExB flow of the plasma is demonstrated with emphasis to the action on the preferential rotation direction. The effect on the particle transport induced by the background turbulence and by the structures is discussed. Finally the methods tested to control turbulence and to mitigate the related transport are illustrated and discussed.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

magnetized plasma

plasma turbulence

anomalous transport

Reversed Field Pinch

velocity shear-layer

electrostatic turbulence

relaxation phenomena

self-similarity

edge plasma

flow shear

fluctuations

intermittency

suppression

dynamics

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ref (ämneskategori)

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