A signature of self-organized criticality in the HT-6M edge plasma turbulence

Citation
Wh. Wang et al., A signature of self-organized criticality in the HT-6M edge plasma turbulence, CHIN PHYS L, 18(3), 2001, pp. 396-398
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
CHINESE PHYSICS LETTERS
ISSN journal
0256-307X → ACNP
Volume
18
Issue
3
Year of publication
2001
Pages
396 - 398
Database
ISI
SICI code
0256-307X(200103)18:3<396:ASOSCI>2.0.ZU;2-B
Abstract
Power spectra of electron density and Boating potential fluctuations in the velocity shear layer of the HT-GM edge region have been measured and analy sed. All the spectra have three distinct frequency regions with the spectra l decay indices typical of self-organized criticality systems (0, -1 and -4 ) when Doppler shift effects induced by the plasma E x B how velocity have been taken into account. These results are consistent with the predictions of the self-organized criticality models, which may be an indication of edg e plasma turbulence ill the HT-GM tokamak evolving into a critical state in dependent of local plasma parameters.