Electrostatic fluctuations at the edge of the CT-6B tokamak

Citation
Gd. Wang et al., Electrostatic fluctuations at the edge of the CT-6B tokamak, NUCL FUSION, 39(2), 1999, pp. 263-269
Citations number
34
Categorie Soggetti
Physics
Journal title
NUCLEAR FUSION
ISSN journal
00295515 → ACNP
Volume
39
Issue
2
Year of publication
1999
Pages
263 - 269
Database
ISI
SICI code
0029-5515(199902)39:2<263:EFATEO>2.0.ZU;2-N
Abstract
Langmuir probes and a Mach probe were used for measuring edge fluctuations and parallel plasma flow, respectively, on the CT-GB tokamak, A maximum rad ial gradient in parallel flow was observed to be located roughly at the max imum E-tau shear layer (or, namely, the poloidal velocity shear layer). E-t au. shear is found to be very possibly consistent with a regulating effect on edge turbulence features. Non-linear analysis indicates that non-linear phase coupling in turbulence may be influenced by E-tau shear, or that ther e exist coherent structures induced by strong E-tau shear, and the phase co upling processes show an intermittent character. The results provide some n ew observations for a better understanding of the basic mechanisms of edge turbulence.