Reply to the comment on 'Recent results on turbulence and MHD activity achieved by reflectometry'

R. Sabot (1) , P. Hennequin (2) , E.Z. Gusakov (3) , Stéphane Heuraux (4)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 LPTP - Laboratoire de Physique et Technologies des Plasmas
3 HTPPL - High Temperature Plasma Physics Laboratory
4 LPMIA - Laboratoire de physique des milieux ionisés et applications

Over the last years, owing to hardware progress and the development of new methods, reflectometry has become a common diagnostic on plasma fusion devices. This paper presents some results obtained with reflectometry on transport, turbulence and magnetohydrodynamic (MHD). The emphasis is put on some new results from Tore-Supra. Combining the density profile and fluctuation measurement, it was shown on Tore-Supra that the particle pinch inside the q = 1 surface is close to the neoclassical value in ohmic plasma, while the observed small diffusion is in agreement with a very low level of density fluctuations inside the q = 1 surface. In β scaling experiments, no change in the fluctuation levels was found on Tore-Supra, in agreement with the observation of weak confinement degradation with increasing β. Zonal flows have been detected by Doppler reflectometry in ASDEX-U and with correlation reflectometry in T-10. On Tore-Supra, a fast decrease in the density fluctuation

Mots clés: MHD; density fluctuation; transport; reflectometry

Domaines: Physique des plasmas [physics.plasm-ph]

R. Sabot, P. Hennequin, E.Z. Gusakov, Stéphane Heuraux. Reply to the comment on 'Recent results on turbulence and MHD activity achieved by reflectometry'. Plasma Physics and Controlled Fusion, 2007, 49, pp.561. ⟨10.1088/0741-3335/49/4/N02⟩. ⟨hal-00522893⟩