Coupled simulation of kinetic pedestal growth and MHD ELM crash
نویسندگان
چکیده
منابع مشابه
Plasma Edge Kinetic-MHD Modeling in Tokamaks Using Kepler Workflow for Code Coupling, Data Management and Visualization
A new predictive computer simulation tool targeting the development of the H-mode pedestal at the plasma edge in tokamaks and the triggering and dynamics of edge localizedmodes (ELMs) is presented in this report. This tool brings together, in a coordinated and effective manner, several first-principles physics simulation codes, stability analysis packages, and data processing and visualization ...
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Theoretical study of ELMs as a relaxation phenomenon has been performed. It is motivated by the balance between plasma heating and the loss of energy during ELM turbulences. The energy balance is examined for particular heating scheme with neutral beam injection (NBI) in steady state scenarios of ASDEX Upgrade, JET, DIII-D and JT-60U with ELM oscillations. In this approach we have calculated th...
متن کاملCorrelations of Elm Frequency with Pedestal Plasma Properties
JET data for the correlations between pedestal plasma temperature and density with the frequency of different type ELMs are analyzed in the framework of a classical Focker-Planck approach. In first approximation we derive a functional dependence in steady state of ELMs assuming equality between the outward flux of plasma from the core and the loss of plasma from the pedestal into the SOL. In th...
متن کاملSOL and pedestal density profile evolution during DIII-D ELMy and ELM-suppressed H-mode operation
A fast profile reflectometer has been used to study the detailed characteristics of scrape-off-layer (SOL) and pedestal density profile evolution in DIII-D ELMy H-mode plasmas with high temporal (P10 ls) and spatial ( 4 mm) resolution. Results show a significant enhancement in radial particle transport to the outer vessel wall during Type-I ELMs. The radial particle transport time ( 140 ls) bec...
متن کاملPedestal and ELM characteristics with different first wall materials and nitrogen seeding in ASDEX Upgrade
A comparison of ASDEX Upgrade (AUG) discharges performed with carbon and the full tungsten wall shows that the pedestal performance at low triangularity is not altered without gas puffing. The pedestal electron pressure is the same for both wall materials as is the confinement. With the tungsten wall the natural density is higher even without an additional gas puff. In typical operation with ga...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2007
ISSN: 1742-6596
DOI: 10.1088/1742-6596/78/1/012087