Publications related to Toroid

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Helicon wave fundamental properties are explored experimentally and numerically in linear and toroidal geometries in the low-temperature plasma devices RAID and TORPEX. The helicon wave-plasma interaction is studied in terms of wave damping, propagation conditions in toroidal geometry, and nonlinear behavior.

Nuclear fusion reactors offer a promising approach to clean energy production. The design of a tokamak reactor employs external magnetic fields to confine a plasma in a toroidal shape, while external heating mechanisms bring it to thermonuclear conditions. Effective control of plasma temperature, density, and magnetic topology is crucial and requires high-performance systems. Central to this control is the plasma control system, which demands a comprehensive, methodical design and deployment plan before rea

Formulas for the volume, poloidal and toroidal surfaces, poloidal length, plasma current, and hence average poloidal field, are determined using global parameters of tokamak plasmas. Previous formulas did not include systematically the effect of triangular ...

In a published Physical Review Letter (Reiman 2007 Phys. Rev. Lett. 99 135007), it was shown that axisymmetric (or vertical) stability can be improved by placing a set of parallelogram coils above and below the plasma oriented at an angle to the constant t ...

The geodesic acoustic mode (GAM) is a coherently oscillating zonal flow that may regulate turbulence in toroidal plasmas. Uniquely, the complete poloidal and toroidal structure of the magnetic component of the turbulence-driven GAM has been mapped in the T ...

Edge-localized modes (ELMs) are instabilities in the edge of tokamak plasmas in the high confinement regime (H-mode). Despite beneficial aspects of ELMs, in a future device the size of the energy loss per ELM must be controlled, in order to avoid intolerab ...

The zone of calcified cartilage (ZCC) is critical for the normal attachment of articular cartilage to bone as well as to the biomimetic bioengineering of osteochondral tissue constructs. However, relatively few osteochondral tissue engineering approaches have created a tissue resembling and functioning like the ZCC. The implementation of a double diffusion system, wherein calcium (

{Ca}^{2+}

) and phosphate (

{{PO}_{4}}^{3-}

) ions are diffused toward each other, provides a method to induce local mineraliza

We present a fully-global linear gyrokinetic simulation code (GYGLES) aimed at describing the unstable spectrum of the ion-temperature-gradient modes in toroidal geometry. We formulate the Particle-In-Cell method with finite elements defined in magnetic coordinates, which provides excellent numerical convergence properties. The poloidal mode structure corresponding to k(parallel to) = 0 is extracted without approximation from the equations, which reduces drastically the numerical resolution needed. The code

The spectrum of n = 0 Alfven modes is calculated analytically and numerically in cylindrical and toroidal geometries. It includes global Alfven eigenmodes (GAEs) and surface modes (SMs) of the fast magnetoacoustic wave. These modes are not induced by toroidicity. The n = 0 GAEs owe their existence to shear. The frequency spacing between different radial and poloidal modes and the correlation of eigenfrequencies with changes in the edge density are examined and found to be in complete agreement with experime

The authors examine the space of Riemann surfaces of signature (1,1) with metric of curvature -1 and geodesic boundary. They solve explicitly the moduli problem in this case and show furthermore that two surfaces of this type having the same length spectrum (this referring to smooth closed geodesics including the boundary) are isometric. They announce the same type of result for genus two surfaces without boundary. The problem whether the analogous assertion holds for the spectrum of the Laplacian with resp

Toroid

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Helicon Wave-Plasma Interaction in Linear and Toroidal Geometries with Birdcage Resonant Antennas

A Simulink-based platform for model-based design and deployment of controllers for tokamak nuclear fusion devices

Geometric formulas for system codes including the effect of negative triangularity

Stabilization of the vertical instability by non-axisymmetric coils

Complete multi-field characterization of the geodesic acoustic mode in the TCV tokamak

Non-linear magnetic perturbations during edge-localized modes in TCV dominated by low n mode components

Effect of calcification on agarose gel stiffness and integration strength with Bone

Finite element approach to global gyrokinetic Particle-In-Cell simulations using magnetic coordinates

Alfven frequency modes and global Alfven eigenmodes

The geometry and spectrum of the one holed torus