Optical elements for focusing of terahertz laser radiation in a given two-dimensional domain

Binary silicon-based diffractive optical element (DOE)—Gaussian-to-Square focuser (diameter of aperture is 30 mm) for the terahertz spectral range has been designed and characterized using terahertz radiation of the Novosibirsk Free Electron Laser (NovoFEL) at the wavelength of 141 μm. The preliminary experiments have demonstrated feasibility of application of binary silicon DOE for focusing of terahertz radiation into pre-given focal domain.     

Focusing of Novosibirsk Free Electron Laser (NovoFEL) radiation into paraxial segment

Abstract

We demonstrate results of studies of a silicon binary diffractive optical element (DOE) focusing a terahertz laser Gaussian beam into a paraxial segment. The characteristics of the DOE were examined on a Novosibirsk Free Electron Laser beam of 141-μm wavelength.     

Application of probability filter to signal processing problems

A method of signal filtering based on the maximum likelihood principle is presented. This method provides elimination of random distortions caused by noises, conserving local specific features of the signal. The concept of probability filtering ensures processing of both discrete and piecewise-continuous signals. Dmitrii P. Vetrov. Born 1981. Post-graduate student at Moscow State University, to graduate in 2006. Works at the Dorodnicyn Computing Center, Russian Academy of Sciences. Scientific interests: pattern recognition, machine learning, mathematical statistics, expert systems. Nine publications. Dmitrii A. Kropotov. Born 1981. Post-graduate student at Moscow State University, to graduate in 2006. Works at the Dorodnicyn Computing Center, Russian Academy of Sciences. Scientific interests: pattern recognition, machine learning, mathematical statistics, expert systems. Eight publications.     

A mobile system for treating low-salinity low-activity liquid wastes

Moscow Radon Cooperative. Applied Technology Research and Development Institute. Translated from Atomnaya Énergiya, Vol. 73, no. 6, pp. 474-478, December, 1992.     

Effect of alpha-tocopherol and its derivatives on the viability of cultured malignant cells

The effect of alpha-tocopherol and its derivatives on viability and growth of attached cells culture: human epithelioid carcinoma of cervix HeLa-S3K and human cervical carcinoma cell line C-4-1 according to protein content and level of alkaline phosphatase, as well to unattached cells: human acute leukemia cell cultures CEM-C-1 and CEM-C-7 according to the amount of viable cells in suspension has been studied. It has been shown that alpha-tocopherol acetate and tocopherol maintain the viability of cells, while the derivatives of tocopherol with shorted side chain considerably inhibit growth of researched cultures, alpha-tocopherol with lacking side chain being most active among them.