Results 61 to 70 of about 8,079 (237)

Dependence of ELM instability on separatrix density in EAST long-pulse H-mode plasmas

Nuclear Fusion
The transition from small edge-localized modes (ELMs) to large ELMs has been repetitively observed in minute-scale long-pulse high-confinement mode (H-mode) discharges during the 2017 EAST campaign.
Y.F. Wang, G.Z. Jia, G.S. Xu, R. Chen, L. Chen, N. Yan, L. Wang, Q. Zang, T. Zhang, Y.M. Duan, T.F. Zhou, Y.F. Jin, M.R. Wang, H.Q. Liu, W. Gao, Y.W. Yu, G.H. Hu, Q.Q. Yang, K.D. Li, X. Lin, Y. Ye, Z.Y. Liu, H.Q. Wang, J. Huang, X.Z. Gong, EAST Teams   +25 more
doaj   +1 more source

Spike-Threshold Variability Originated from Separatrix-Crossing in Neuronal Dynamics [PDF]

Scientific Reports, 2015
The threshold voltage for action potential generation is a key regulator of neuronal signal processing, yet the mechanism of its dynamic variation is still not well described.
Longfei Wang, Hengtong Wang, Lianchun Yu, Yong Chen   +3 more
semanticscholar   +1 more source

Minimizing separatrix crossings through isoprominence

Plasma Physics and Controlled Fusion, 2023
Abstract A simple property of magnetic fields that minimizes bouncing to passing type transitions of guiding center orbits is defined and discussed. This property, called isoprominence, is explored through the framework of a near-axis expansion.
J W Burby, N Duignan, J D Meiss
openaire   +2 more sources

An Estimation of the Heat Load Distribution on the Divertor Target Using the CSD Model

Contributions to Plasma Physics, EarlyView.
ABSTRACT Handling the heat load on the divertor target is a critical issue in the design of fusion reactors. Estimating the heat load, supported by computationally efficient simulations with varying design parameters, provides valuable input to high‐level design discussions and the development of design guidelines.
Kazuhiro Yamada, Kazuo Hoshino, Gakushi Kawamura, Hang Si, Akiyoshi Hatayama   +4 more
wiley   +1 more source

Separatrix ion to electron temperature ratio in the TCV and ASDEX Upgrade tokamaks

Nuclear Fusion
Increased focus has been recently given to the ion temperature T _i near the separatrix and in the scrape-off layer (SOL) due to its impact on plasma confinement, wall sputtering, heat fluxes, and edge turbulence.
M. Cavedon, D. Brida, F. Bagnato, R.A. Coosemans, H. Reimerdes, P. Cano-Megias, R. Dux, T. Eich, O. Février, L. Frassinetti, G. Grenfell, G. Harrer, L. Scotti, B. Vincent, the ASDEX Upgrade Team, the TCV Team, the EUROfusion Tokamak Exploitation Team   +16 more
doaj   +1 more source

A predation model considering a generalist predator and the Rosenzweig functional response

Mathematical Modelling and Analysis
This work deals with the dynamics of an ordinary differential equation system describing a Leslie-Gower predator-prey model with a generalist predator and a non-differentiable functional response proposed by M. L. Rosenzweig, given by h(x) = qxα with 0 <
Viviana Rivera-Estay, Alejandro Rojas-Palma, Eduardo González-Olivares   +2 more
doaj   +1 more source

Investigating the neutralizer cathode location in the SPT type Hall Effect thruster [PDF]

علوم، فناوری و کاربردهای فضایی
The position of the cathode concerning the magnetic field map inside the discharge channel affects the performance and lifetime of the Hall effect thruster. The neutralizer cathode has two important functions in the Hall effect thruster.
mohammadmehdi shafie, Morteza Farhid, Masumeh Kiantaj, Samira Mir mazhari, Leili mahmoudi   +4 more
doaj   +1 more source

MHD stability constraints on divertor heat flux width in DIII-D

Nuclear Materials and Energy, 2020
The radial width of the exhaust heat flux flowing in the SOL of DIII-D is found to expand at high input power and plasma density, consistent with MHD ballooning stability limits.
A.W. Leonard, A.E. Jaervinen, A.G. McLean, F. Scotti   +3 more
doaj   +1 more source

Disintegration of an eruptive filament via interactions with quasi-separatrix layers [PDF]

, 2017
The disintegration of solar filaments via mass drainage is a frequently observed phenomenon during a variety of filament activities. It is generally considered that the draining of dense filament material is directed by both gravity and magnetic field ...
Rui Liu, Jun Chen, Yuming Wang
semanticscholar   +1 more source

Coupling Fluid Neutrals to Gyrokinetic Plasma Dynamics for Edge and SOL Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Accurate modeling of turbulent transport in magnetic confinement fusion devices requires extending first‐principles gyrokinetic simulations from the core to the edge and scrape‐off layer (SOL), where additional physics—particularly plasma–neutrals interactions—must be included.
Sabine Ogier‐Collin, Philipp Ulbl, Wladimir Zholobenko, Frank Jenko   +3 more
wiley   +1 more source