Observation of turbulence exponential wave number spectra at ion sub-Larmor scales in FT-2 tokamak

A.D. Gurchenko, E.Z. Gusakov, D.V. Kouprienko, S. Leerink, A.B. Altukhov, Jukka A. Heikkinen, S.I. Lashkul, L.A. Esipov, A.Yu. Stepanov

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)


Implementation of the correlative enhanced scattering technique in the FT-2 tokamak has resulted in measurements of both frequency and wave number spectra of a small-scale microturbulence. It is found that during the dynamic current ramp-up discharge the turbulence possesses a wide wave number spectrum which could be described by universal exponential dependence in the range of 3–4 orders of amplitude characterized by two parameters—the turbulence level and scale length. Both parameters are found to decrease substantially when the shear of the poloidal plasma rotation estimated from Doppler frequency shift of the enhanced scattering signal increases at plasma periphery. Simultaneously transition to an improved confinement resulting in the suppression of anomalous electron transport and decrease in the electron energy confinement time is observed in the experiment.
Original languageEnglish
Article number035010
JournalPlasma Physics and Controlled Fusion
Issue number3
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Observation of turbulence exponential wave number spectra at ion sub-Larmor scales in FT-2 tokamak'. Together they form a unique fingerprint.

Cite this