1999•Unpublished venueRequires access
Pedestals and confinement in Alcator C-Mod H-modes
A. Hubbard, B. Lipschultz, D. Mossessian, R. L. Boivin, J. A. Goetz, R. Granetz, M. Greenwald, I. H. Hutchinson, J. Irby, D. Johnson, B. LaBombard, Y. Lin, J. W. Hughes, D. R. Mikkelsen, T. S. Pedersen, C. S. Pitcher, G. Taylor, S. Wolfe
Open publisher page 3 citations
Abstract
The study of regimes, pedestal conditions and confinement is a focus of research on the Alcator C-Mod tokamak. In addition to the usual ELM-free regime, a new regime has been observed on C-Mod which has good energy confinement but lower particle and impurity confinement, named the Enhanced D-alpha (EDA) H-mode for one of its signatures [1]. This mode can be steady-state and usually has no discrete ELMs, making it potentially attractive for a reactor. Since the main changes in are in the plasma edge region, measurements of the pedestal are critical to this study. New, high resolution diagnostics and profiles are described below.