CHARACTERIZATION OF FLUCTUATIONS IN THE JET DIVERTOR PLASMAS WITH LANGMUIR PROBES

Citation
I. Garciacortes et al., CHARACTERIZATION OF FLUCTUATIONS IN THE JET DIVERTOR PLASMAS WITH LANGMUIR PROBES, Plasma physics and controlled fusion, 38(12), 1996, pp. 2051-2062
Citations number
22
Categorie Soggetti
Phsycs, Fluid & Plasmas
ISSN journal
07413335
Volume
38
Issue
12
Year of publication
1996
Pages
2051 - 2062
Database
ISI
SICI code
0741-3335(1996)38:12<2051:COFITJ>2.0.ZU;2-2
Abstract
Langmuir probe tips embedded in the divertor and X-point sweeping prov ide JET with high spatial resolution profiles of fluctuations. Broadba nd fluctuation spectra have been observed in the divertor plasma strik e zones with the absolute and relative level of fluctuations increasin g when crossing the separatrix from the scrape-off layer into the priv ate flux region. Asymmetries in the fluctuation levels measured at the inner and outer divertor plates have been observed with a higher leve l of fluctuations at the outer target. Fluctuation levels are altered by the L-H transition, with the strongest modification in the proximit y of the separatrix. A significant rise in the relative level of fluct uations has also been observed in detached plasmas in comparison with attached plasmas.