Results 71 to 80 of about 8,079 (237)

Numerical calculation for limit values of control parameters in the problem about extension with torsion for special sample in the framed structure

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The numerical procedure for computation of the loads limit values was considered in this article. This loads apply to discrete gradient mechanical systems. Part of their elements can work at loss of strength stadium already.
Valeriy V Struzhanov, Valentina V Privalova   +1 more
doaj  

Electron Distribution Functions Around a Reconnection X‐Line Resolved by the FOTE Method

Geophysical Research Letters, 2019
Using data from the MMS mission and the First‐Order Taylor Expansion (FOTE) method, here we reveal electron distribution functions around a reconnection X‐line at the Earth's magnetopause. We find cigar distribution of electrons in both the magnetosphere‐
Z. Wang, H. S. Fu, C. M. Liu, Y. Y. Liu, G. Cozzani, B. L. Giles, K.‐J. Hwang, J. L. Burch   +7 more
doaj   +1 more source

Edge Fluid Turbulence Simulations of Stellarators With GRILLIX

Contributions to Plasma Physics, EarlyView.
ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir, Christoph Pitzal, Barnabas Csillag, Miguel Madeira, Marion Finkbeiner   +4 more
wiley   +1 more source

Role of turbulent separatrix tangle in the improvement of the integrated pedestal and heat exhaust issue for stationary-operation tokamak fusion reactors

Nuclear Fusion
The magnetic separatrix surface is designed to provide the final and critical confinement to the hot stationary-operation core plasma in modern tokamak reactors in the absence of an external magnetic perturbation (MP) or transient magneto-hydrodynamic ...
C.S. Chang, S. Ku, R. Hager, J. Choi, D. Pugmire, S. Klasky, A. Loarte, R.A Pitts   +7 more
doaj   +1 more source

Qualitative properties of solutions to a generalized Fisher–KPP equation

Electronic Journal of Qualitative Theory of Differential Equations
The following Fisher–KPP type equation $$ u_t=Ku_{xx}-Bu^q+Au^p, \quad (x,t)\in\mathbb{R}\times(0,\infty), $$ with $p>q>0$ and $A$, $B$, $K$ positive coefficients, is considered.
Razvan Gabriel Iagar, Ariel Sánchez
doaj   +1 more source

Energy Conversion during Asymmetric Magnetic Reconnection

The Astrophysical Journal, 2023
Asymmetric magnetic reconnection usually occurs at the Earth’s magnetopause, where the magnetic field strength and plasma density are different between the magnetosheath and magnetosphere.
Cong Chang, Kai Huang, San Lu, Rongsheng Wang, Quanming Lu   +4 more
doaj   +1 more source

Shortcuts to Adiabaticity across a Separatrix

Physical Review Letters
Shortcuts to adiabaticity are strategies for conserving adiabatic invariants under non-adiabatic (i.e. fast-driving) conditions. Here, we show how to extend classical, Hamiltonian shortcuts to adiabaticity to allow the crossing of a phase-space separatrix -- a situation in which a corresponding adiabatic protocol does not exist.
Roi Holtzman, Oren Raz, Christopher Jarzynski   +2 more
openaire   +3 more sources

Effect of Magnetic Islands on Neoclassical Heat Diffusivity in a Global Tokamak Simulation

Contributions to Plasma Physics, EarlyView.
ABSTRACT Resonant magnetic perturbations (RMPs) alter magnetic field topology via island formation and can modify core transport in toroidal fusion devices. Using the global gyrokinetic particle‐in‐cell code XGC‐S, originally developed for stellarator geometries, we quantify how island topology affects neoclassical heat transport in a circular tokamak ...
Joseph X. Li, Toseo Moritaka, Ryutaro Kanno, Gakushi Kawamura, Robert Hager, C.‐S. Chang   +5 more
wiley   +1 more source

First SOLPS‐ITER Simulation Study of Japanese DEMO on Leakage of Seeded Ar Impurity

Contributions to Plasma Physics, EarlyView.
ABSTRACT For JA DEMO, one of the grand challenges is efficiently handling the extreme power loads onto plasma‐facing components, particularly the divertor targets. Impurity seeding is an essential strategy for increasing the radiation losses and thereby reducing the heat load on the targets.
Hang Si, Gakushi Kawamura, Nobuyuki Asakura, Kazuo Hoshino, Haruki Seto, Yoshiteru Sakamoto, Masatoshi Yagi   +6 more
wiley   +1 more source

Quasi-continuous exhaust operational space

Nuclear Fusion
The IPED predictive pedestal code has been used to determine the critical gradients for the onset of 1) separatrix ballooning modes and 2) global peeling-ballooning modes as a function of plasma shaping.
M. Dunne, M. Faitsch, L. Radovanovic, E. Wolfrum, the ASDEX Upgrade Team   +4 more
doaj   +1 more source