Relationship between frequency power spectra and intermittent, large-amplitude bursts in the Alcator C-Mod scrape-off layer
نویسندگان
چکیده
منابع مشابه
The Scrape - Off - Layer in Alcator C - Mod – Transport , Turbulence , and Flows
Research on the scrape-off-layer plasma of the Alcator C-Mod Tokamak is reviewed. The research has focused on understanding the transport of energy and particles both parallel and perpendicular to the magnetic field. Large differences between the inboard, high-field side scrape-off-layer and the outboard, low-field side are found. On the outboard side large levels of anomalous cross-field trans...
متن کاملFlow measurements in the Scrape-Off Layer of Alcator C-Mod using Impurity Plumes
Accurate measurements of plasma flows in the scrape-off layer (SOL) are a necessary requirement for understanding the physics of tokamak edge plasmas. A system is being developed on Alcator C-Mod for inferring flows parallel (v‖) and perpendicular (vE×B) to local magnetic field lines from impurity emission patterns (“plumes”) generated by local gas injection. Carbon plumes are generated at vari...
متن کاملParticle transport in the scrape-off layer and its relationship to discharge density limit in Alcator C-Mod*
Cross-field particle transport in the scrape-off layer ~SOL! of Alcator C-Mod @Phys. Plasmas 1, 1511 ~1994!# can be characterized by an effective particle diffusivity (Deff) that increases markedly with distance from the separatrix. As a consequence, recycling onto the main-chamber walls is large compared to plasma flows into the divertor volume. The SOL exhibits a two-layer structure: Steep gr...
متن کاملMagnetic topology effects on Alcator C-Mod scrape-off layer flow
Recent interest in the experimental study of tokamak plasma flow for different magnetic field geometries calls for theoretical understanding of the effects of tokamak magnetic topology changes on the flow. The consequences of total magnetic field reversal and/or X-point reversal on divergence-free plasma flow within magnetic flux surfaces is considered and the results are applied to interpret r...
متن کاملIntermittent fluctuations in the TCV scrape-off layer
Probe measurements in the scrape-off layer of tokamak plasmas show that the ion saturation current signal is dominated by large amplitude bursts. Analysis of data time series from tokamak á configuration variable of unprecedented duration reveals that both burst amplitudes and waiting times are exponentially distributed. The average burst wave form has an exponential shape with a characteristic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Fusion
سال: 2017
ISSN: 0029-5515,1741-4326
DOI: 10.1088/1741-4326/aa7e4c