Publication Type
Conference Paper
Journal Name
Journal of Nuclear Materials
Publication Date
Page Numbers
516 to 519
Volume
390-91
Conference Name
18th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices
Conference Location
Toldeo, Spain
Conference Sponsor
Spanish Natl Fus Lab; Spanish Minist Sci & Innovat
Conference Date
-
Abstract
Plasma-wall interaction analysis is developed at the National Spherical Torus Experiment. At present, poloidally separated recycling and neutral pressure measurements are used to characterize recycling flux trends. The causes of monotonic density increases observed in initial phases of H-mode discharges at t <= 0.2-0.6 s appear to be the monotonically increasing source in the divertor, and particle containment time tau(p)* long in comparison with discharge duration. The ratio of the wall flux to divertor flux is low throughout the density increase phase except in the initial segment, when dN(e)/dt is highest and magnitudes of the wall and divertor fluxes are similar. (C) 2009 Elsevier B.V. All rights reserved.