Comparative analysis of gas dynamic regimes of high-power UV and IR gas laser interactions with solids in the atmosphere

2000 ◽  
Author(s):  
Vladimir D. Zvorykin
Keyword(s):  
Comparative Analysis ◽  
High Power ◽  
Gas Laser ◽  
Gas Dynamic ◽  
Laser Interactions

scholarly journals A comparative analysis of cascaded-multilevel hybrid filters applied in power transmission systems

2008 ◽  
Vol 19 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Alexandre G. Merçon ◽  
Lucas F. Encarnação ◽  
Luís F. C. Monteiro ◽  
Emanuel L. van Emmerik ◽  
Maurício Aredes
Keyword(s):  
Comparative Analysis ◽  
High Power ◽  
Power Transmission ◽  
High Harmonic ◽  
Active Filter ◽  
Active Filters ◽  
Transmission Systems ◽  
Passive Filters ◽  
Power Transmission Systems ◽  
Hybrid Filters

Passive filters, commonly used to attenuate non-characteristic harmonics in High Voltage Direct Current (HVDC) systems, stay at risk of disconnection from the system due to overcurrent problems. A possible solution to solve the problems involving high harmonic levels would be the use of pure active filters. However, this alternative is unpractical due to the high power of the transmission systems. This paper proposes two different topologies of hybrid filters to damp harmonic resonance in power transmission systems. The first one combines a small-rated active filter in series with passive filters, limiting overcurrents, when existent, or improving its own quality factor. The second one consists of an active filter in parallel with passive filters, which compensates all eventual overcurrent in the system bus. Both topologies utilizes the state of the art in very high power semiconductors and multilevel power converters. Simulation results present a comparative analysis, highlighting the efficiency of, and the differences between, the two proposed hybrid filters.

Heat treatment of large-scale rolling machine rolls by high-power gas dynamic laser at Cherepovetz Metallurgy Works

1997 ◽  
Author(s):  
Alexei A. Betev ◽  
Vyatcheslav T. Karpukhin ◽  
Yuri B. Konev ◽  
B. M. Kozlov ◽  
Leonid I. Danilov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Power ◽  
Large Scale ◽  
Gas Dynamic

Femtosecond pulse parametric amplification at narrowband high power gas laser pumping

2012 ◽  
Vol 37 (11) ◽  
pp. 2100 ◽  
Author(s):  
Ondřej Novák ◽  
Hana Turčičová ◽  
Martin Divoký ◽  
Martin Smrž ◽  
Jaroslav Huynh ◽  
...  
Keyword(s):  
High Power ◽  
Femtosecond Pulse ◽  
Parametric Amplification ◽  
Gas Laser ◽  
Laser Pumping

High Power 55 Watts CW Raman Fiber-Gas-Laser

2010 ◽  
Author(s):  
F. Couny ◽  
B. J. Mangan ◽  
A. V. Sokolov ◽  
F. Benabid
Keyword(s):  
High Power ◽  
Gas Laser

scholarly journals Surface waves and electron acceleration from high-power, kilojoule-class laser interactions with underdense plasma

2013 ◽  
Vol 15 (2) ◽  
pp. 025023 ◽  
Author(s):  
L Willingale ◽  
A G R Thomas ◽  
P M Nilson ◽  
H Chen ◽  
J Cobble ◽  
...  
Keyword(s):  
Surface Waves ◽  
High Power ◽  
Electron Acceleration ◽  
Underdense Plasma ◽  
Laser Interactions

scholarly journals Structures of high-power electric propulsion systems

2021 ◽  
Vol 1 (395) ◽  
pp. 119-131
Author(s):  
I. Gagarinov ◽  
Keyword(s):  
Comparative Analysis ◽  
High Power ◽  
Electric Propulsion ◽  
Propulsion Systems ◽  
Technical Data ◽  
Electric Propulsion System ◽  
Design Solutions ◽  
Oil Tankers ◽  
Made In

Object and purpose of research. This paper discusses structures of high-power electric propulsion systems for ships. The purpose was to give a summary of design solutions made in development of these systems. Materials and methods. This paper relies on academic and technical data, as well on the long-term author’s experience in marine electric propulsion R&Ds. The solution suggested by the author is based on the comparative analysis of design solutions adopted in the development of structures for high-power marine electric power and propulsion systems. Main results. Summary on design solutions for high-power electric propulsion systems of such ships as icebreakers, oil tankers, LNGCs and cruise liners. Conclusion. Results obtained by author were used in the design of the electric propulsion system of the «Lider» nuclear icebreaker and further could be used in design of Arctic vessels.

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