Fast sweeping reflectometry upgrade on Tore Supra

F. Clairet (1) , Stéphane Heuraux (2) , C. Bottereau (1) , D. Molina (1)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 IJL - Institut Jean Lamour

In order to study the temporal dynamics of turbulence, the sweep time of our reflectometry has been shortened from 20 to 2 μs with 1 μs dead time. Detailed technical aspects of the upgrade are given, namely, about the stability of the ramp generation, the detection setup, and the fast acquisition module. A review of studies (velocity measurement of the turbulence, modifications of the wavenumber spectrum, radial mapping of correlation time, etc.) offered by such improvements is presented.

Mots clés: Tokamaks; spherical tokamaks; reflectometry

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

F. Clairet, Stéphane Heuraux, C. Bottereau, D. Molina. Fast sweeping reflectometry upgrade on Tore Supra. Review of Scientific Instruments, 2010, 81, pp.10D903. ⟨10.1063/1.3460624⟩. ⟨hal-00522902⟩