Multifaceted asymmetric radiation from the edge-like asymmetric radiative collapse of density limited plasmas in the Large Helical Device

Citation
Bj. Peterson et al., Multifaceted asymmetric radiation from the edge-like asymmetric radiative collapse of density limited plasmas in the Large Helical Device, PHYS PLASMA, 8(9), 2001, pp. 3861-3864
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
9
Year of publication
2001
Pages
3861 - 3864
Database
ISI
SICI code
1070-664X(200109)8:9<3861:MARFTE>2.0.ZU;2-3
Abstract
Neutral beam injection heated discharges at the density limit in the Large Helical Device [O. Motojima, H. Yamada, A. Komori , Phys. Plasmas 6, 1843 ( 1999)] are terminated with asymmetric radiative collapse (ARC) exhibiting s everal properties in common with the MARFE (multifaceted asymmetric radiati on from the edge) phenomenon: (1) A highly poloidally asymmetric radiation profile which is stronger on the inboard side. (2) This asymmetry is well c orrelated with the signal from the multichord interferometer. (3) Moreover, evidence from several diagnostics at different toroidal locations supports the possibility that ARC may be toroidally symmetric. However in contrast to MARFE, ARC is only observed in the period just prior to the quench of th e plasma. (C) 2001 American Institute of Physics.