Inductive current profile modification in MST has been successful in reducing fluctuations and transport but is transient and radially non-localized. Current profile control with rf waves offers steady and more precise control. Studies of lower hybrid wave and electron Bernstein wave injection are underway. The lower hybrid antenna has coupled 125 kW to the plasma. Hard x-ray emission with ener...

Fluorescence microscopy in the near-infrared between 950 and 1600 nm has been developed as a novel method to image and study single-walled carbon nanotubes (SWNTs) in a variety of environments. Intrinsic photoluminescence of disaggregated pristine SWNTs was excited by a diode laser and detected with a two-dimensional InGaAs photodiode array. Individual nanotubes were visualized with a spatial r...

We demonstrate a technique for the accurate measurement of diffusion coefficients alkali vapor in an inert buffer gas. The was performed by establishing spatially periodic density grating isotopically pure $^{87}\mathrm{Rb}$ and observing decaying coherent emission from due to diffusive motion through ${\mathrm{N}}_{2}$ obtain coefficient $0.245\ifmmode\pm\else\textpm\fi{}0.002\phantom{\rule{0....

Two-photon excited (TPE) side illumination fluorescence studies in a Rh6G-RhB dye mixture doped polymer optical fiber (POF) and the effect of energy transfer on the attenuation coefficient is reported. The dye doped POF is pumped sideways using 800 nm, 70 fs laser pulses from a Ti:sapphire laser, and the TPE fluorescence emission is collected from the end of the fiber for different propagation ...

This paper proposes an approach for acoustic emission (AE) source localization in a large marble stone using distributed feedback (DFB) fiber lasers. The aim of this study is to detect damage in structures such as those found in civil applications. The directional sensitivity of DFB fiber laser is investigated by calculating location coefficient using a method of digital signal analysis. In thi...

this study investigates monthly and seasonal variations of carbon emission from the soil at different grazing intensities. three areas of exclosure, low and high grazing intensities were selected in ghoosheh region of semnan province. carbon emission was measured monthly, in each treatment applying alkali traps (csc) during a year. emission and grazing data were analyzed, using a factorial expe...

BACKGROUND Asthma attacks and mortality due to inhalation of soybean antigens in Barcelona, Spain have been well documented. A new control scheme was adopted in the city to avoid the emission and dispersion of soybean dust into the atmosphere during unloading. We studied soybean allergen emission during unloading and at 3 industrial sites and compared the results obtained. METHODS Over a peri...