Simulation of Edge Plasmas in DIII-D Double-Null Configurations

• Published in: Contributions to plasma physics (1985) Vol. 42; no. 2-4; pp. 181 - 186
• Main Authors: Rensink, M.E., Lasnier, C.J., Petrie, T.W., Porter, G.D., Rognlien, T.D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Berlin WILEY-VCH Verlag Berlin GmbH 01-04-2002; WILEY‐VCH Verlag Berlin GmbH; Wiley-VCH
• Subjects: Exact sciences and technology; Magnetic confinement and equilibrium; Magnetohydrodynamic waves; Magnetohydrodynamic waves (e.g., alfven waves); Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma properties; Plasma simulation; Tokamaks; Transport properties; Waves, oscillations, and instabilities in plasmas and intense beams; Tokamak; Plasma physics; Divertors; Plasma flow; Theoretical study; Plasma boundary layers; Plasma simulation; Plasma instability; Magnetic surfaces; Magnetic configuration; Plasma magnetohydrodynamics; Fluid models; Plasma transport processes
• ISSN: 0863-1042; 1521-3986
• DOI: 10.1002/1521-3986(200204)42:2/4<181::AID-CTPP181>3.0.CO;2-0

We present fluid model simulation results for the edge plasma in the DIII‐D tokamak with unbalanced double‐null magnetic configurations, including cross field drifts. Input parame‐ters are typical of low‐power operation in DIII‐D. For high‐recycling the plasma tends to be detached from all divertor plates. Midplane plasma and electric field profiles are relatively insensitive to the magnetic imbalance. Divertor heat flux profiles exhibit sharp peaks due to cross‐field drifts when the ion grad‐B drift direction is away from the x‐point toward the magnetic axis.