Edge Plasma Effects in DIII-D Impurity Seeded Discharges

Conference · Sat Jun 01 00:00:00 EDT 2002

OSTI ID:804352

Jackson, G L; Boedo, J A; Lasnier, C J; Leonard, A W; McKee, G R; Murakami, M; Wade, M R; Watkins, J G; West, W P; Whyte, D G

DIII-D, ELMing H-mode radiating mantle discharges have been obtained with electron density near the Greenwald density limit and a large fraction of the input power radiated inside the last closed flux surface, significantly reducing peak divertor heat fluxes. In these ''puff and pump'' discharges, the introduction of argon reduces particle flux to divertor tiles by a factor of 4 while peak heat flux is half of the no impurity value, suggesting that impurity seeding may be a useful control tool to reduce wall heat and particle fluxes in fusion reactors. A robust H-mode transport barrier is maintained and there is little change in the ELM energy or in the ELM frequency.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (US)
• DOE Contract Number: AC03-99ER54463
• OSTI ID: 804352
• Resource Relation: Conference: 15th International Conference on Plasma Surface Interactions, Gifu (JP), 05/27/2002--05/31/2002; Other Information: This is a preprint of a paper presented at the 15th International Conference on Plasma Surface Interactions in Controlled Fusion Devices, May 27-31, 2002, in Gifu, Japan, and to be published in the Proceedings.; PBD: 1 Jun 2002
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
DIVERTORS
DOUBLET-3 DEVICE
ELECTRON DENSITY
HEAT FLUX
MAGNETIC SURFACES
PLASMA
THERMONUCLEAR REACTORS
TRANSPORT