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Title: The effect of divertor baffling on Alcator C-Mod discharges

Abstract

The effect of divertor baffling on Alcator C-Mod [Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] discharges has been investigated using a novel divertor bypass. The bypass allows the in situ variation of the mechanical conductance from the divertor plenum to the main chamber between or even during discharges. The results indicate a strong dependence on baffling for the compression of deuterium and recycling impurity gases in the divertor plenum in a variety of C-Mod discharges, indicating that tight baffling would be desirable in a future tokamak reactor. There is no apparent effect of the divertor baffling for the Ohmic, L-mode and EDA (Enhanced D{sub {alpha}}) H-mode discharges in this study on main chamber neutral particle populations, scrape-off-layer flows, nonrecycling impurity screening, global energy confinement or H-mode threshold powers. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. MIT Plasma Science and Fusion Center, NW17, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
20216058
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DIVERTORS; ALCATOR DEVICE; BAFFLES; PLASMA SCRAPE-OFF LAYER; TOROIDAL CONFIGURATION; PLASMA IMPURITIES; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Pitcher, C. S., Boswell, C. J., Goetz, J. A., LaBombard, B., Lipschultz, B., Rice, J. E., and Terry, J. L. The effect of divertor baffling on Alcator C-Mod discharges. United States: N. p., 2000. Web. doi:10.1063/1.874013.
Pitcher, C. S., Boswell, C. J., Goetz, J. A., LaBombard, B., Lipschultz, B., Rice, J. E., & Terry, J. L. The effect of divertor baffling on Alcator C-Mod discharges. United States. doi:10.1063/1.874013.
Pitcher, C. S., Boswell, C. J., Goetz, J. A., LaBombard, B., Lipschultz, B., Rice, J. E., and Terry, J. L. Mon . "The effect of divertor baffling on Alcator C-Mod discharges". United States. doi:10.1063/1.874013.
@article{osti_20216058,
title = {The effect of divertor baffling on Alcator C-Mod discharges},
author = {Pitcher, C. S. and Boswell, C. J. and Goetz, J. A. and LaBombard, B. and Lipschultz, B. and Rice, J. E. and Terry, J. L.},
abstractNote = {The effect of divertor baffling on Alcator C-Mod [Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] discharges has been investigated using a novel divertor bypass. The bypass allows the in situ variation of the mechanical conductance from the divertor plenum to the main chamber between or even during discharges. The results indicate a strong dependence on baffling for the compression of deuterium and recycling impurity gases in the divertor plenum in a variety of C-Mod discharges, indicating that tight baffling would be desirable in a future tokamak reactor. There is no apparent effect of the divertor baffling for the Ohmic, L-mode and EDA (Enhanced D{sub {alpha}}) H-mode discharges in this study on main chamber neutral particle populations, scrape-off-layer flows, nonrecycling impurity screening, global energy confinement or H-mode threshold powers. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874013},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}