Author/Authors :
Ko?an، نويسنده , , M. and Gunn، نويسنده , , J.P. and Pascal، نويسنده , , J.-Y. and Bonhomme، نويسنده , , G. and Devynck، نويسنده , , P. Cerda-Duran، نويسنده , , I. and Gauthier، نويسنده , , E. and Ghendrih، نويسنده , , P. and Marandet، نويسنده , , Y. and Pegourie، نويسنده , , B. and Vallet، نويسنده , , J.-C.، نويسنده ,
Abstract :
The scrape-off layer (SOL) ion (Ti) and electron (Te) temperatures were measured in ohmic plasmas of the Tore Supra tokamak for a wide range of main plasma parameters. Ti increases strongly with the intensity of the toroidal magnetic field Bt, whereas Te is nearly unaffected. The ion-to-electron temperature ratio τ = T i / T e ∝ B t 2.5 and is a weak function of plasma density and plasma current. Close to the last closed flux surface τ = 2 → 6 so that equipartition is never reached. The SOL ion temperature e-folding length is about 30% greater than the electron temperature e-folding length meaning that τ increases with radius in the SOL.
