The model of synchronization between internal reconnections and edge-localized modes

2021 ◽  
Author(s):  
Viktor Bulanin ◽  
Gleb Kurskiev ◽  
Vladimir Solokha ◽  
Alexander Yashin ◽  
Nikita Sergeevich Zhiltsov
Keyword(s):  
Stability Analysis ◽  
Numerical Analysis ◽  
Experimental Evidence ◽  
Penetration Depth ◽  
Current Density ◽  
Induced Current ◽  
Localized Modes ◽  
Excess Current ◽  
Edge Localized Modes ◽  
Magnetic Equilibrium

Abstract A new model for interaction between the internal reconnections caused by sawtooth and the edge-localized modes (ELM) was presented. The experimental evidence of the coupling between sawtooth crash and ELM events were observed in the Globus-M and Globus-M2 tokamaks. The numerical analysis of magnetic equilibrium showed that internal reconnections can induce the excess current density near the separatrix during the several hundreds of μs. The excess current destabilizes the peeling-ballooning instability. The peeling-ballooning stability analysis showed that the penetration depth of the induced current should be in the range of ψnorm = 0.8 - 0.95 to trigger the instability.

Stability analysis of H-mode pedestal and edge localized modes in a Joint European Torus power scan

2004 ◽  
Vol 11 (4) ◽  
pp. 1469-1475 ◽  
Author(s):  
Thawatchai Onjun ◽  
Arnold H. Kritz ◽  
Glenn Bateman ◽  
Vassili Parail ◽  
Howard Wilson ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Localized Modes ◽  
Edge Localized Modes

Mechanical Performances of ITER In-Vessel Coil’s Conductor

2013 ◽  
Author(s):  
Huan Jin ◽  
Wu Yu ◽  
Feng Long ◽  
Min Yu ◽  
Qiyang Han ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Strong Coupling ◽  
Thermal Fatigue ◽  
Work Conditions ◽  
Nuclear Radiation ◽  
Localized Modes ◽  
Edge Localized Modes ◽  
Point Bend ◽  
Mechanical Performances

The design and R&D for ITER In-Vessel Coils (IVCs) is being deployed. The concerned issue of “Edge Localized Modes” (ELMs) and “Vertical Stabilization” (VS) of the ITER plasma can be addressed by the implemented IVCs. The ELM and VS coils will be installed in the vessel just behind the blanket shield modules to reach the requirement of keeping strong coupling with the plasma. The 59mm Stainless Steel Jacketed Mineral Insulated Conductor (SSMIC) using MgO as the insulation is being designed for the IVCs to resist the special challenges, including the nuclear radiation, high temperature, electromagnetic and thermal fatigue. It is necessary to take the mechanical performances of the SSMIC and the feasibility of fabrication techniques into consideration of the R&D program. The mechanical performances of the SSMIC close to the actual work conditions, including the three point bend modulus, three point bend cyclical performance and the cyclical performance with a U-bend sample of the SSMIC prototypes have been investigated and the results are presented in this paper.

scholarly journals On the onset of type I edge localized modes

2009 ◽  
Vol 49 (4) ◽  
pp. 049801
Author(s):  
G.Y Antar ◽  
S.I Krasheninnikov ◽  
P.B Snyder ◽  
R.A Moyer ◽  
R Pugno ◽  
...  
Keyword(s):  
Type I ◽  
Localized Modes ◽  
Edge Localized Modes

Numerical Analysis of Kinetic Energy Projectile Sabot Structure Influencing the Armour Penetration Depth. Part I - Projectile Basic Option

2021 ◽  
Vol 155 (4) ◽  
pp. 23-48
Author(s):  
Tomasz Błaszczak ◽  
Mariusz Magier
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Kinetic Energy ◽  
Penetration Depth ◽  
Simulation Environment ◽  
The Finite Element Method ◽  
Development Trends ◽  
Terminal Ballistics ◽  
Potential Development

A numerical analysis over influence of kinetic energy projectile sabot structure on the armour depth penetration is presented in the paper. The analysis has identified an influence of sabot different materials into projectile combat performance, and some areas of sabot structure where its shape can be optimised. The finite element method in Solidworks Simulation environment was used in analysis. Due to it the dynamical loads of the sabot at the time of firing could be investi-gated. The influence of sabot different materials and projectile geometry modifications on the strength of penetrator sabot joining was studied. A pattern of dynamical loads for the penetrator sabot joining was simulated and visualised. For selected options of the structure the calculations were performed over the terminal ballistics. It allowed an identification of potential development trends for this brand of ammunition.

scholarly journals TRACKING DOWN LOCALIZED MODES IN PT-SYMMETRIC HAMILTONIANS UNDER THE INFLUENCE OF A COMPETING NONLINEARITY

2014 ◽  
Vol 54 (2) ◽  
pp. 79-84 ◽  
Author(s):  
Bijan Bagchi ◽  
Subhrajit Modak ◽  
Prasanta K. Panigrahi
Keyword(s):  
Growth Rate ◽  
Refractive Index ◽  
Stability Analysis ◽  
Linear Stability Analysis ◽  
Time Reversal ◽  
Time Parameter ◽  
Optical Systems ◽  
Localized Modes ◽  
Symmetric Structures ◽  
Schrödinger System

The relevance of parity and time reversal (PT)-symmetric structures in optical systems has been known for some time with the correspondence existing between the Schrödinger equation and the paraxial equation of diffraction, where the time parameter represents the propagating distance and the refractive index acts as the complex potential. In this paper, we systematically analyze a normalized form of the nonlinear Schrödinger system with two new families of PT-symmetric potentials in the presence of competing nonlinearities. We generate a class of localized eigenmodes and carry out a linear stability analysis on the solutions. In particular, we find an interesting feature of bifurcation characterized by the parameter of perturbative growth rate passing through zero, where a transition to imaginary eigenvalues occurs.

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