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Monday, April 27, 2009
10:30 AM - 12:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Seminar

Edge Plasma Transport, Sheath, Wall, and Synergy

Sergei Krasheninnikov
University of California at San Diego

The edge plasma transport (including sheath region) and the plasma-wall interactions play a very significant role in the performance of current magnetically confined plasma devices and are of utter importance for the operation of next-generation fusion reactors (e.g. ITER). These effects to large extent determine such crucial characteristics as: parameters of the edge plasma pedestal in H-mode (and, therefore, the confinement of core plasma), formation of MARFE, divertor detachment, the physics of transient events (including ELMs and pedestal recovery, onset/loss of detachment, etc.), helium ash exhaust, impurity contamination, material erosion/deposition/migration processes, tritium retention in wall materials, power load handling, and the lifetime of plasma-facing components.

We review key aspects of edge plasma transport, sheath effects, and wall physics. We show how their synergy results in new physical phenomena that are important for burning plasma experiments and already observed in current fusion devices.

Host: Natalia Vinyard, T-5