Non-local heat flux application for scrape-off layer plasma
نویسندگان
چکیده
منابع مشابه
Diffusive-convective transition for scrape-off layer transport and the heat-flux width
Transport of plasma from the edge pedestal gradient region into the scrape-off layer (SOL) forms the heat exhaust channel. The properties of this channel are critical for future tokamak devices. The SOL heat-flux width is believed to be set by a competition between classical parallel transport and turbulent cross-field transport. In previous work, [Myra J R, et al. 2011 J. Nucl. Mat. 415 S605] ...
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I These equations are implemented in GBS, a 3D, flux-driven, global turbulence code with circular geometry, and the system is closed by the Poisson’s equation ω = ∇⊥φ [Ricci et al., PPCF 2012] I System is completed with a set of first-principles boundary conditions applicable at the magnetic pre-sheath entrance where the magnetic field lines intersect the limiter [Loizu et al., PoP 2012]: v‖i =...
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The impact of plasma shaping on tokamak scrape-off layer (SOL) turbulence is investigated. The drift-reduced Braginskii equations are written for arbitrary magnetic geometries, and an analytical equilibrium model is used to introduce the dependence of turbulence equations on tokamak inverse aspect ratio ( ), Shafranov’s shift (∆), elongation (κ), and triangularity (δ). A linear study of plasma ...
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The substantial drop of the plasma temperature along magnetic field lines with increasing plasma density is one of the main features in tokamak divertors. As a result the temperature gradient at the divertor plates becomes very steep and the boundary condition normally applied for the parallel Mach number M at the target, Mt = 1, cannot be satisfied. In this case the value of Mt based on the ge...
متن کاملStochastic modeling of intermittent scrape-off layer plasma fluctuations.
Single-point measurements of fluctuations in the scrape-off layer of magnetized plasmas are generally found to be dominated by large-amplitude bursts which are associated with radial motion of bloblike structures. A stochastic model for these fluctuations is presented, with the plasma density given by a random sequence of bursts with a fixed wave form. When the burst events occur in accordance ...
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ژورنال
عنوان ژورنال: Contributions to Plasma Physics
سال: 2018
ISSN: 0863-1042
DOI: 10.1002/ctpp.201700162