Alpha ash transport and ash control

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6638804

Miley, G H; Hu, S C; Varadarajan, V

This paper discusses: thermal {alpha}-particle transport is a crucial issue in ash buildup. The transport will determine if buildup prevents ignition and if external control is necessary. Due to uncertainties in the transport coefficients, 1-1/2-D sensitivity study of the influence on the fusion power density is done using the BALDUR code. The Baldur simulations with varying diffusion coefficients for ash plasma are performed. The results of ash transport in the presence of sawteeth and varying edge conditions are discussed. Also, the nature of the fishbone oscillation in the presence of two hot species consisting of hot alphas and beam injected ions is discussed. The sawteeth and fishbones can be potential mechanisms for enhanced ash transport; the latter will indirectly influence the ash transport.

• Research Organization: Illinois Univ., Urbana, IL (USA). Fusion Studies Lab.
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-86ER52127
• OSTI ID: 6638804
• Report Number(s): DOE/ER/52127-68; CONF-9007143-1; ON: DE90015659; TRN: 90-025307
• Resource Relation: Conference: ITER burn control meeting, Garching (Germany, F.R.), 9-13 Jul 1990
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ITER TOKAMAK
CHARGED-PARTICLE TRANSPORT
ALPHA PARTICLES
DISPERSION RELATIONS
DISTRIBUTION FUNCTIONS
FISHBONE INSTABILITY
SAWTOOTH OSCILLATIONS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
FUNCTIONS
INSTABILITY
OSCILLATIONS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATION TRANSPORT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700103* - Fusion Energy- Plasma Research- Kinetics