Characterization and Modification of Edge-Driven Instabilities in the DIII-D Tokamak

Conference · Thu Jul 01 00:00:00 EDT 1999

OSTI ID:766941

Ferron, J R; Lao, L L; Osborne, T H; Strait, E J; Turnbull, A D; Miller, R L; Taylor, T S; Doyle, E J; Rice, B W; Zhang, C; Chen, L; Baylor, L R; Murakami, M; Wade, M R

The character of edge localized modes (ELMs) and the height of the edge pressure pedestal in DIII-D tokamak H-mode discharges have been modified by varying the discharge shape (triangularity and squareness) and the safety factor, increasing the edge radiation, and injecting deuterium pellets. Changes in the ELM frequency and amplitude, and the magnitude of the edge pressure gradient, and changes in the calculated extent of the region of access to the ballooning mode second stability regime are observed.

• Research Organization: General Atomics, San Diego, CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC03-99ER54463; W-7405-ENG-48; AC05-96OR22464; FG03-86ER53225; FG03-94ER54271
• OSTI ID: 766941
• Report Number(s): GA-A23156; TRN: US0110518
• Resource Relation: Conference: 26th European Physical Society Conference on Controlled Fusion and Plasma Physics, Maastricht (NL), 06/14/1999--06/18/1999; Other Information: PBD: 1 Jul 1999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DEUTERIUM
DOUBLET-3 DEVICE
EDGE LOCALIZED MODES
MODIFICATIONS
PRESSURE GRADIENTS
H-MODE PLASMA CONFINEMENT