We have developed a novel technique for the measurement of size avalanche fluctuations gaseous detectors using gating device (gating foil) prepared time projection chamber in international linear collider experiment (ILD-TPC). In addition to function, foil is capable controlling average fraction drift electrons detected after gas amplification. The signal charge width and shape (skewness) elect...

The analysis and optimization of the npvnp avalanche diode have been realized on basis of the nonlinear model and special optimization procedure. This type of the diode that was named as Double Avalanche Region (DAR) IMPATT diode includes two avalanche regions inside the diode. The phase delay which was produced by means of the two avalanche regions and the drift region v is sufficient to obtai...

A review of fatal United States avalanche accidents in the 1990s shows terrain, weather, and snow pack conditions are generally contributory factors to fatal avalanche accidents; human factors are the primary factor. Human errors are made in terms of judgement, skills, and knowledge. This paper discusses the human factors and errors that might mitigate decision-making errors. The relevant infor...

This paper presents a new concept for the remote detection of radioactive materials. The concept is based on the detection of electromagnetic signatures in the vicinity of radioactive material and can enable stand-off detection at distances greater than 100 m. Radioactive materials emit gamma rays which ionize the surrounding air. The ionized electrons rapidly attach to oxygen molecules forming...

The Thomson scattering diagnostic on MST records both equilibrium and fluctuating electron temperature with a range capability of 10 eV-5 keV. Standard operation with two modified commercial Nd:YAG lasers allows measurements at rates of 1 kHz-25 kHz. Several subsystems of the diagnostic are being improved. The power supplies for the avalanche photodiode detectors (APDs) that record the scattere...

The economic implications of network topologies are studied via a monopolist’s model of market networks originally proposed by Phan, et al. (2003). By embedding the market into a larger collection of network topologies, in particular, a class of scale-free networks, we extend the early analysis built upon a class of ring networks. To facilitate the study of the impacts of network topologies upo...

Avalanche behavior of gravitationally-forced granular layers on a rough inclined plane are investigated experimentally for different materials and for a variety of grain shapes ranging from spherical beads to highly anisotropic particles with dendritic shape. We measure the front velocity, area and the height of many avalanches and correlate the motion with the area and height. We also measure ...