Results 261 to 270 of about 134,640 (311)

Laser heating of particles in dusty plasmas

Physical Review E, 2005
Experiments on the heating and melting of two-dimensional finite dust crystals are performed using random laser excitation of the dust particles by a rapidly moving laser beam. The achievable dust temperatures scale with the square of the laser power.
Matthias, Wolter, André, Melzer
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Heating by Laser Light

1995
Heat treatments serve a wide range of purposes in today’s material technology. Examples include softening or hardening of metals, “annealing” of crystals, dopant diffusion in semiconductors, compound formation in mixtures or thin-film couples, oxide layer growth, polymerization of plastics and many others.
Martin von Allmen, Andreas Blatter
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Laser heating of droplets with absorbing core

Applied Optics, 1990
The irradiation and heating of a spherical droplet containing an absorbing core are studied numerically using a corrected surface energy balance.
B S, Park, R L, Armstrong
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Heat transfer in water under laser heating through fibres for endovenous laser coagulation

Quantum Electronics, 2020
Abstract We report the results of studying heat transfer in water heated by a cw laser with wavelengths of 1.55 and 1.94 μm through optical fibres with end-face and radial outputs. It is shown that, depending on the power and wavelength of the radiation, heat transfer is implemented via convection, bubble boiling, or explosive boiling ...
V.P. Minaev, N.V. Minaev, V.Yu. Bogachev, K.A. Kaperiz, D.A. Fedorov, V.I. Yusupov   +5 more
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Laser-induced local heating of multilayers

Applied Optics, 1982
For a multilayer structure illuminated by a laser beam, absorption of optical energy in the absorptive layers and the diffusion of the resultant heat throughout the structure are studied. Analytical and numerical procedures for this study are described, and, as a specific example, the profiles of temperature distribution during recording on a ...
M, Mansuripur, G A, Connell, J W, Goodman   +2 more
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LASER SPECKLE PHOTOGRAPHY FOR HEAT TRANSFER

Experimental Thermal and Fluid Science, 1993
ABSTRACT Laser speckle photography, as a technique making use of the displacement of optical speckle by refraction as information carrier, is recently used to measure fluid density, temperature and heat transfer. The concept of laser speckle photography and the measuring principle of temperature gradient field are briefly described.
Zeng-Yuan Guo, Yao-Zu Song
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Laser-heated emissive plasma probe

Review of Scientific Instruments, 2008
Emissive probes are standard tools in laboratory plasmas for the direct determination of the plasma potential. Usually they consist of a loop of refractory wire heated by an electric current until sufficient electron emission. Recently emissive probes were used also for measuring the radial fluctuation-induced particle flux and other essential ...
Roman, Schrittwieser, Codrina, Ionita, Petru, Balan, Ramona, Gstrein, Olaf, Grulke, Thomas, Windisch, Christian, Brandt, Thomas, Klinger, Ramin, Madani, George, Amarandei, Arun K, Sarma   +10 more
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Plasma heating by two laser fields

Physical Review A, 1988
The heating of a plasma by electrons in the simultaneous presence of weak and strong laser fields by the inverse bremsstrahlung process is considered from a quantum-mechanical viewpoint. A kinetic equation is derived and the change in kinetic energy of the plasma electrons is calculated. Results show that the joint action of the two laser beams gives a
, Fonseca, , Nunes, , Aragão
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Laser Heating of Solids

1983
We are concerned with heating metals and semiconductors to produce a change in their properties in the heated region only. The change may be a solid to solid conversion as in heat treating steels, a solid to liquid to solid conversion as in semiconductor annealing or a solid-to-liquid-to vapor conversion as in cutting or drilling.
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Convective Heat Flux in a Laser-Heated Thruster

Journal of Spacecraft and Rockets, 1979
An analysis is performed to estimate the convective heating to the wall in a laser-heated thruster on the basis of a solution of the laminar boundary-layer equations with variable transport properties. A local similiarity approximation is used, and it is assumed that the gas phase is in equilibrium.
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