675 research outputs found
Impurity transport in plasma edge turbulence
The turbulent transport of minority species/impurities is investigated in 2D
drift-wave turbulence as well as in 3D toroidal drift-Alfven edge turbulence.
The full effects of perpendicular and -- in 3D -- parallel advection are kept
for the impurity species. Anomalous pinch effects are recovered and explained
in terms of Turbulent EquiPartition (TEP)Comment: 12th International Congress on Plasma Physics, 25-29 October 2004,
Nice (France
Numerical study of high impedance T-match antennas for terahertz photomixers
This paper outlines an efficient numerical method to design terahertz photomixers. The simulations are benchmarked using measured power levels from results published in the literature. Next, the method is applied to two new photomixer designs based on the high impedance T-match antenna with bias supply DC-blocking structures for either a uniplanar layout or a multilayer structure for improved device reliability. Manufacturability is favoured by avoiding the use of airbridges, substrate thinning or under-etching. The estimated output power of the improved design is 9.0 (Formula presented.), which is an improvement of three times over the reference photomixer
On minimizing the influence of the noise tail of correlation functions in operational modal analysis
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