During the past several years, the ARIES/Starlite Team has investigated the feasibility and potential features of tokamak fusion power plants. The research also has aimed at identifying both the trade-offs that lead to the optimal regime of operation for a tokamak power plant and the critical plasma physics and technology issues. During the initial phase of the Starlite study, an assessment of ...

Time-dependent two-dimensional magnetohydrodynamic simulations are carried out for tokamak plasmas with edge poloidal flow. Differently from conventional equilibrium theory, a density pedestal all around the edge is obtained when the poloidal velocity exceeds the poloidal sound speed. The outboard pedestal is induced by the transonic discontinuity, the inboard one by mass redistribution. The de...

Two-dimensional measurements of density fluctuations in the DIII-D tokamak, obtained with the Beam Emission Spectroscopy diagnostic, have allowed for construction of images and movies of plasma turbulence which are greatly aiding an understanding of tokamak turbulence phenomena. The measurements are obtained in the radial and poloidal plane at a spatial resolution of near 1 cm (about five ion g...

1 Tokamak fuelling using high velocity compact torus (CTs) Compact toroids (CTs) are self-organized magnetized plasmoids in a nearly force-free Taylor state. In the laboratory, CTs can be formed using coaxial electrodes and a solenoid magnetic field coil. The resultant CT equilibrium is sufficiently robust that it can withstand extremely large acceleration ( > 10 g) and can achieve high final v...

Zusammenfassung Der Garchinger Tokamak ASDEX Upgrade ging vor dreißig Jahren in Betrieb. Seither wurde die Anlage, insbesondere ihre Gefäßeinbauten, Plasma‐Heizsysteme und Diagnostiken, beständig erweitert verbessert. Mit dem Wechsel von einer mit Graphit zu Wolfram bedeckten Gefäßwand mussten viele Plasmaszenarien überarbeitet werden. Hierbei auch Kühlung des Divertorplasmas durch zusätzlich e...

to be conducted . Utilizing precise boundary conditions An emulation system is described which replaces the the most important internal states of the control software ASDEX-Upgrade tokamak device for controlled nuclear can be tested and verified . With this testing of the fusion as a data source and its discharge control system software togeth~'r with redundant systems, fail safe as a processin...

One of the main challenges for the realization of a working fusion power plant is an increased detailed understanding of kinetic phenomena in toroidal plasmas. The tokamak is a toroidal, magnetically confined plasma device and is currently the main line towards a power plant. The spatial and temporal scales in a tokamak plasma are extreme and the only tractable path for quantitative studies is ...

An intermediate frequency (IF) band digitizing radiometer system in the 100-200 GHz frequency range has been developed for Tokamak diagnostics and control, and other fields of research which require a high flexibility in frequency resolution combined with a large bandwidth and the retrieval of the full wave information of the mm-wave signals under investigation. The system is based on directly ...