Ts. Hahm et Kh. Burrell, EXB FLOW SHEAR EFFECTS ON RADIAL CORRELATION LENGTH OF TURBULENCE ANDGYRORADIUS SCALING OF CONFINEMENT, Physics of plasmas, 3(1), 1996, pp. 427-429
The radial correlation length of the turbulence responsible for transp
ort can have a different gyroradius scaling in low (L)-mode and high (
H)-mode plasmas due to EXB flow shear effects, as predicted by the two
-point nonlinear analysis in general tokamak geometry [Phys. Plasmas 2
, 1648 (1995)]. This difference offers a possible understanding of the
recent rho-scan experiment results on DIII-D [Fusion Technol. 8, 441
(1985)] L-mode and H-mode plasmas [Phys. Plasmas 2, 2342 (1995)]. Wit
hin our model, thermal diffusivity in H-mode plasmas scales like gyro-
Bohm, independent of the scaling in L-mode plasmas. (C) 1996 American
Institute of Physics.