TURBULENCE AND ENERGY CONFINEMENT IN TORE SUPRA OHMIC DISCHARGES

被引：47

作者：

GARBET, X ^{[1
]}

PAYAN, J ^{[1
]}

LAVIRON, C ^{[1
]}

DEVYNCK, P ^{[1
]}

SAHA, SK ^{[1
]}

CAPES, H ^{[1
]}

CHEN, XP ^{[1
]}

COULON, JP ^{[1
]}

GIL, C ^{[1
]}

HARRIS, GR ^{[1
]}

HUTTER, T ^{[1
]}

PECQUET, AL ^{[1
]}

TRUC, A ^{[1
]}

HENNEQUIN, P ^{[1
]}

GERVAIS, F ^{[1
]}

QUEMENEUR, A ^{[1
]}

机构：

[1] ECOLE POLYTECH,PHYS MILIEUX IONISES LAB,F-91128 PALAISEAU,FRANCE

来源：

NUCLEAR FUSION | 1992年 / 32卷 / 12期

关键词：

D O I：

10.1088/0029-5515/32/12/I06

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Results on confinement and turbulence from a set of Ohmic discharges in TORE SUPRA are discussed. Attention is focused on the saturation of the energy confinement time and it is emphasized that this saturation can be explained by a saturation of the electron heat diffusivity. The ion behaviour is indeed governed by dilution and equipartition effects. Although the ion heat transport is never neoclassical, there is no enhanced degradation at saturation. This behaviour is confirmed by turbulence measurements using CO2 laser coherent scattering. The level of density fluctuations follows the electron heat diffusivity variations with the average density. Waves propagating in the ion diamagnetic direction are always present in turbulence frequency spectra. Thus, the saturation cannot be explained by the onset of an ion turbulence. The existence of ion turbulence in the edge at all densities cannot be excluded. However, this ion feature in scattering spectra could be explained by a Doppler shift associated with an inversion point of the radial electric field at the edge.

引用

页码：2147 / 2155

页数：9

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