Results 241 to 250 of about 5,885 (271)

Studies of the pedestal structure and inter-ELM pedestal evolution in JET with the ITER-like wall [PDF]

Nuclear Fusion, 2017
The pedestal structure of type I ELMy H-modes has been analysed for JET with the ITER-like Wall (JET-ILW). The electron pressure pedestal width is independent of ρ* and increases proportionally to √βpol,PED. Additional broadening of the width is observed,
L Frassinetti, L Horvath, H R Wilson
exaly   +11 more sources

Elements of H-mode pedestal structure

Plasma Physics and Controlled Fusion, 2023
Abstract This paper reviews current understanding of key physics elements that control the H-mode pedestal structure, which exists at the boundary of magnetically confined plasmas. The structure of interest is the width, height and gradient of temperature, density and pressure profiles in the pedestal. Emphasis is placed on understanding
R J Groebner, S Saarelma
exaly   +2 more sources

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Pedestal Structure without and with 3D Fields

Contributions To Plasma Physics, 2014
AbstractAchieving high pedestal pressures in H(high)‐mode plasmas confined in tokamaks is critical for obtaining fusion burning plasmas in ITER. Recent characterizations of quasi‐equilibrium plasma parameter profiles in low collisionality H‐mode pedestals in the DIII‐D tokamak are briefly summarized.
J D Callen
exaly   +2 more sources

CFETR equilibrium with self-consistent pedestal structure

Fusion Engineering and Design, 2017
Abstract The Chinese Fusion Engineering Test Reactor (CFETR), which aims to fill the gaps between the International Thermonuclear Experimental Reactor (ITER) and DEMO, is in the design stages. Plasma equilibrium is an important basis for tokamak plasma research.
Kai Li, Wenjun Yang, Muquan Wu
exaly   +2 more sources

Sandpiles with Bistable Automata Rules: Towards a Minimal Model of Pedestal Formation and Structure [PDF]

Physical Review Letters, 2002
A sandpile with two stable and two unstable ranges of slopes is presented as a minimal model for the study of H-mode pedestal formation and dynamics. Pedestals are observed to form and expand inward with increasing deposition.
P H Diamond, M N Rosenbluth
exaly   +2 more sources

Pedestal structure in H-mode plasmas

Nuclear Fusion, 2014
The present understanding of edge pedestal structure is reviewed. Pedestal plasma strongly affects fusion power and divertor heat load, and as such, characterization of the pedestal structure has significantly progressed. In high-confinement mode (H-mode) plasmas, the pedestal component plays the role of a boundary condition in determining the core ...
Hajime Urano
exaly   +2 more sources

Tungsten pedestal structure for nanotriode devices

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 2004
The nanotriode is a vacuum nanoelectronic device with a turn-on voltage for a field emission of ∼8 V, in which electrons are emitted from a metal nanotip with a radius ∼1 nm in an integrated vacuum chamber, over a distance of ∼100 nm. However, surface breakdown of the gate-cathode dielectric within the device chamber occurs ∼2 V outside of its ...
A. M. Blackburn, D. G. Hasko, H. Ahmed, D. A. Williams   +3 more
openaire   +1 more source

SOL effects on the pedestal structure in DIII-D discharges

Nuclear Fusion, 2017
Analysis with the SOLPS code suite (Schneider R. et al 1992 J. Nucl. Mater. 196 810; Wiesen S. et al 2015 J. Nucl. Mater. 463 480–4; Bonnin X. et al 2016 Plasma Fusion Res. 11 1403102) explains the differences in pedestal structure associated with different ion drift directions in DIII-D.
A C Sontag, J M Canik, A W Leonard
exaly   +3 more sources

Edge pedestal structure

Physics of Plasmas, 2004
The hypothesis is advanced and it is investigated that, in between or in the absence of edge-localized modes, the structure of the edge pedestal is determined by the transport requirements of plasma particle, momentum and energy balance, and by recycling neutral atoms.
openaire   +1 more source

The Research of EAST Pedestal Structure and Preliminary Application

Plasma Science and Technology, 2016
The pedestal characteristic is an important basis for high confinement mode (H-mode) research. Because of the finite spatial resolution of Thomson scattering (TS) diagnostic on Experimental Advanced Superconducting Tokamak (EAST), it is necessary to characterize the pedestal with a suitable functional form.
Tengfei Wang, Qing Zang, Xiaofeng Han, Shumei Xiao, Ailan Hu, Junyu Zhao   +5 more
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