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112 results on '"Zakharov, S. M."'

46. Laser plasma pinching in a high-current accelerator diode.

Author

Ivanenkov, G. V., Kolomensky, A. A., Pikuz, S. A., Samokhin, A. I., and Zakharov, S. M.

Abstract

Plasma compression in the diode of the 2.1010 W high-current electron accelerator "Don" was investigated. Plasma of 2.1015 cm−3 electron density was obtained by the focussing of a neo-dymium glass laser beam onto the surface of an Al-cathode. Formation of dense pinched plasma was observed by means of five-frame exposure, Q-switched, ruby laser interferometry and shadow photography. Plasma temperature and electron plasma density were determined from the multiply-charged Al-ion spectra, which turned out to be 0.2–1.0 keV and 1020 cm−3, respectively. Good symmetry of the pinched plasma could be observed on the basis of X-ray images. [ABSTRACT FROM PUBLISHER]

Published
1981

47. An overview of rolling stock and track monitoring systems and guidelines to provide safety of heavy and long train operation in the Russian Railways.

Author

Cherkashin, U. M., Zakharov, S. M., and Semechkin, A. E.

Subjects
RAILROADS, RAILROAD tracks, ROLLING stock, RAILROAD trains, RAILROAD safety measures
Abstract

An analysis of statistics on derailment of freight trains in the Russian Railways is carried out. Some results of simulation of vehicle-track interaction and experimental studies on moving of empty cars along track sections with diverse combination of horizontal and vertical irregularities are presented. An overview of guidelines to provide safety of heavy and long train operation is also presented. Technical means of rolling stock and track condition monitoring that is used and developing in the Russian Railways is described. Existing and developing wayside and on-board automated monitoring systems enabling continuous control over moving rolling stock and track are discussed. To provide safety of heavy haul operation, a general concept of a complex system of safety management based on monitoring of rolling stock and track is suggested. [ABSTRACT FROM AUTHOR]

Published
2009
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48. Observation of X-Ray Lines from Highly Ionized Iron in a Laser Plasma (Nablyudenie Rentgenovskikh linii Vysokoyonizovannogo Zheleza v Lazernoi Plazme)

Author

NAVAL RESEARCH LAB WASHINGTON D C, Aglitskii,E. V., Boiko,V. A., Zakharov,S. M., Sklizkov,G. V., Federov,A. N., NAVAL RESEARCH LAB WASHINGTON D C, Aglitskii,E. V., Boiko,V. A., Zakharov,S. M., Sklizkov,G. V., and Federov,A. N.

Abstract

Investigation of the energy structure of multicharged ions formed in a hot laser plasma requires progression from the vacuum ultraviolet to the soft X-ray region of the spectrum, as a large part of the transitions of astrophysical interest lie precisely in this range. In the apparatus described in the report for analyzing the soft X-ray radiation of a laser plasma, a convex crystal was used as the dispersing element. A spectrogram was obtained containing about 40 lines of highly ionized iron in the region of 10-16A.

Published
1972

49. Initial Stages of the Laser Plasma Motion in the Regime of Gas-Dynamic Expansion

Author

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Basov,N. G., Boiko,V. A., Gribkov,V. A., Zakharov,S. M., Krokhin,O. N., FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Basov,N. G., Boiko,V. A., Gribkov,V. A., Zakharov,S. M., and Krokhin,O. N.

Abstract

The paper deals with experimental investigation of gas-dynamic properties of the laser plasma, created by focusing power laser radiation on the carbon target surface. The time dependence of the plasma pressure in the heated part, mass flux from the target surface and heated plasma mass are measured by the method of time scanning of the interferogram split image with an image converter tube. The gas-dynamic processes taking place in the heated plasma are discussed. It is observed that in the case of a multimode Q-switched laser the plasma pressure maximum is reached at the pulse beginning. Maximum plasma pressure reaches up to 10(superscript 6) barr at a laser energy of 8 joules. (Author), Edited machine trans. of Akademiya Nauk SSSR. Fizicheskii Institut. Trudy, n38 p1-21 1971, by R. Wallace.

Published
1972

50. Determination of the Electron Density Profile in a Laser Plasma by Stark Broadening of Spectral Lines (Opredelenie Profilya Elektronnoi Plotnosti v Lazernoi Plazme po Shtarkovskomu Ushireniyu Spektralnykh linii)

Author

NAVAL RESEARCH LAB WASHINGTON D C, Aglitskii,E. V., Boiko,V. A., Zakharov,S. M., Sklizkov,G. V., NAVAL RESEARCH LAB WASHINGTON D C, Aglitskii,E. V., Boiko,V. A., Zakharov,S. M., and Sklizkov,G. V.

Abstract

Electron density measurements in a carbon plasma created by heating a solid target with about 1 GW emission from a glass laser were performed. The dependence of Ne on the distance from the target was determined by Stark broadening of H-like Carbon VI spectral lines in the vacuum and quartz ultraviolet regions. The Doppler shift of Carbon IV ion absorption lines (like Fraunhofer solar lines) permitted the measurement of the asymptotic gas-dynamic velocity of ion expansion., Trans. of Akademiya Nauk SSSR. Fizicheskii Institut. Preprint n143 1970, by Richard S. Relac and Edgar A. McLean.

Published
1972

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