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Showing 1 to 10 of 10 for “"ASDEX Upgrade"”.
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The Low Frequency Edge Oscillation in Alcator C-Mod and ASDEX Upgrade I-Mode
… on Alcator C-Mod (C-Mod) and 5kHz and 15kHz on ASDEX Upgrade (AUG). These include, but are not limited to: Reflectometry (density measurement), Gas Puff Imaging (density measurement), electron cyclotron emission (temperature measurement), Mirnov Coils (magnetic field fluctuation measurement), …
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Understanding the nature of fluctuations in the edge of I-mode and L-mode plasmas at ASDEX Upgrade
… fluctuations in the edge region of plasmas at ASDEX Upgrade (AUG) to better understand how changes in fluctuations relate to changes in transport between L and I-mode, as well as L-modes across different magnetic configurations (favorable and unfavorable grad B drift). An extensive turbulence …
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Numerical simulation of neoclassical currents, parallel viscosity, and radial current balance in tokamak plasmas
… balance. This is performed both for JET and ASDEX Upgrade tokamaks using the ASCOT code. It is shown that shear high enough for turbulence suppression can be driven at the Low (L) to High (H) transition conditions without taking into account anomalous processes. In agreement with experiments, …
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Modelling of global impurity transport in tokamaks in the presence of non-axisymmetric effects
… global impurity transport is simulated in the ASDEX Upgrade and JET tokamaks with the Monte Carlo orbit-following code ASCOT. The simulations address experiments conducted on these devices, using tracer impurities injected into the plasma in a gaseous form, and via special wall tiles installed …
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Investigation of Multi-Z Impurity Transport in Tokamaks using Neural Networks
… confinement modes in Alcator C-Mod, DIII-D, and ASDEX-Upgrade. To reduce training complexity, shot data are discretized by radius, and networks are developed at six ρ coordinates: 0.2, 0.4, 0.6, 0.7, 0.8, and 0.9. Fifteen plasma parameters are selected as inputs to the neural networks after …
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Characterization of main ion properties for the optimization of future fusion power plants
… has been installed and exploited at the ASDEX Upgrade experimental reactor, a full metal wall device, to provide main ion temperature and toroidal rotation velocity measurements. A new in-vessel optical head has been installed, which covers the outermost plasma region with a resolution …
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Investigation of intrinsic rotation dependencies in Alcator C-Mod using a new data analysis workflow
… the experimental results in C-Mod and ASDEX Upgrade have shown strong disagreement with the 1 -D neoclassical model. Strong correlation has been found between u' and the effective collisionality Veff. These findings are inconsistent with previous experimental studies and suggest that …
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Experimental classification of divertor detachment
… of the Balmer lines, has been installed at ASDEX Upgrade. Initial problems with reflected stray-radiation have been solved and first measurements were successfully compared for consistency with other diagnostics. The detachment process was then investigated with an extensive set of density …
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Manifold learning techniques and statistical approaches applied to the disruption prediction in tokamaks
… of the data. Data for this thesis comes from ASDEX Upgrade (AUG). ASDEX Upgrade is a medium size tokamak experiment located at IPP Max-Planck-Institut für Plasmaphysik, Garching bei München (Germany). At present it is the largest tokamak in Germany. Among the available methods the attention …