A helical axis stellarator equilibrium model

A novel statistical model for mandibular helical axis analysis.

The purpose of this study was to establish a new statistical method for the analysis of noisy mandibular helical axis parameters, especially the position vector of the finite helical axis (FHA). The subjects were children with anterior cross-bite who had received orthodontic treatment. Maximum mouth-opening was measured by means of an opto-electronic motion analysis system. These movements were...

Results from helical axis stellarators

Faraday rotation as a density diagnostic for helical axis stellarators

It is shown that the Faraday ratation of a linexly polarized electromagnetic wave probing a helicalaxis-stellamtor plasma is a useful electron density diagnostic. The twisted magnetic geometry results in a large magnetic field component in the vettinl plane that is asumed to contain the probe beam(s). As a result, significant polarization rotations result for far-infrared beams traversing plasm...

What is a stellarator?*

A stellarator is a toroidal plasma confinement concept that uses effects that arise in the absence of toroidal symmetry to maintain the magnetic configuration without the need for current drive. The largest magnetic fusion machines under construction are stellarators, and the plasma parameters achieved in stellarators are second only to those in tokamaks. Stellarators are poised for rapid progr...

Aerodynamic Analysis of a Helical Vertical Axis Wind Turbine

Vertical axis wind turbines (VAWTs) are gradually receiving more and more interest due to their lower sensitivity to the yawed wind direction. Compared with straight blades VAWT, blades with a certain helicity show a better aerodynamic performance and less noise emission. Nowadays computational fluid dynamics technology is frequently applied to VAWTs and gives results that can reflect real flow...