Experimental investigation of the interaction of rhodamine 6G laser radiation with aluminum

Bakeev, A. A.; Barikhin, B. A.; Borovkov, V. V.; Васильев, Л А; Nikolashina, L. I.; Pavlovskiĭ, A. I.; Prokopenko, N. V.; Sukhanov, L V; Fedosimov, A I; Yakovlev, V. I.

doi:10.1070/qe1980v010n02abeh009934

Sov. J. Quantum Electron.

1980

DOI: 10.1070/qe1980v010n02abeh009934

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Experimental investigation of the interaction of rhodamine 6G laser radiation with aluminum

A. A. Bakeev¹,

B. A. Barikhin²,

V. V. Borovkov³

et al.

Abstract: The voltage margin of a resistor-logic demultiplexer can be improved significantly by basing its connection pattern on a constant-weight code. Each distinct code determines a unique demultiplexer, and therefore a large family of circuits is defined. We consider using these demultiplexers for building nanoscale crossbar memories, and determine the voltage margin of the memory system based on a particular code. We determine a purely code-theoretic criterion for selecting codes that will yield memories with large… Show more

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“…1. The radiation from a laser based on an ethanol solution of rhodamine 6G with a coaxial pump lamp 1 [4] passing through the focusing system 2 hit the specimen 3 located in a vacuum chamber. The time form of the generation pulse of the laser 1 is given in Fig.…”

mentioning

confidence: 99%

Plasma Torch Development and Crater Growth Dynamics in the Course of Laser Processing of Materials and its Diangostics

Васильев

Ivanov

Копыцкий

et al. 2016

J Eng Phys Thermophy

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UDC 535.391:621.376 and V. I. Nedolugov aThe evolution of the plasma torch arising under the action of laser radiation on a metal specimen has been investigated by several methods. The dependence of the time form and the spectrum of acoustic vibrations on the parameters of the irradiated material and the law of increase in the crater depth has been determined. It has been found that under the action of a lser pulse of length ~20 μs on the surface of a copper specimen the growth time of the destruction zone is about 40-50 μs, which is in good agreement with the lifetime of plasma formation near the surface of the target subjected to laser-plasma processing (~50 μs). It has been shown that the use of the model of a loaded zone with moving boundaries emitting acoustic waves into an elastic medium permits solving an important practical problem -determining the law of time growth of the zone of irreversible deformations on the surface of the specimen subjected to pulsed laser plasma processing.Introduction. The action of laser radiation (LR) on a substance is accompanied by a whole number of phenomena. One of such phenomena is acoustic emission of the zone of laser destruction of the material. The essence of this phenomenon is that under the action of LR on the surface of a solid, the laser destruction zone under the action of high pressure in the vapor-plasma formation formed from the evaporated material and air (laser torch) begins to vibrate and emit sound waves into the irradiated medium [1]. Experiments and calculations show that between the parameters of emitted acoustic waves and the parameters of the destruction zone there is a unique relation. Thus, the destruction zone parameters can be determined by the acoustic emission parameters, which can have a practical application [2].In the above works, in considering the emission, a model of a loaded region emitting acoustic waves into an elastic medium is used [1, 2]. The time dependences and the spectra of pressure pulses in the elastic wave calculated with the use of the given method agree well with experimental data but only beginning from the second quarter of the period of pressure oscillations in the experimentally registered acoustic wave. The discrepancy is explained by the generation of acoustic waves in the process of growth of the formed zone of inelastic deformations [3].The aim of the present work is to investigate simultaneously the development of the laser torch and the acoustic emission of the destruction zone formed under the action of pulsed laser radiation on the surface of a metal and study the relationship between the parameters of time dependences of the pressure in the generated elastic wave and the change in the sizes (in particular, the depth) of the irreversibly deformed zone on the surface of the irradiated specimen.Experimental Facility and Results of the Experiment. The experimental facility is schematically represented in Fig. 1. The radiation from a laser based on an ethanol solution of rhodamine 6G with a coaxial pump lamp 1 [4] pas...

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mentioning

confidence: 99%

Plasma Torch Development and Crater Growth Dynamics in the Course of Laser Processing of Materials and its Diangostics

Васильев

Ivanov

Копыцкий

et al. 2016

J Eng Phys Thermophy

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Influence of the laser wavelength on the threshold of plasma formation as a result of irradiation of opaque materials

Berchenko¹,

Koshkin²,

Sobolev³

et al. 1981

Sov. J. Quantum Electron.

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PACS. 78.30G -Infrared and Raman spectra in inorganic crystals. PACS. 63.20P -Localized modes. PACS. 66.30H -Self-diffusion and ionic conduction in nonmetals.Abstract. -Far-IR static-electric-field experiments on KI : Ag+ reveal that the field-induced frequency shifts for the <(pocket,, vibrational gap modes are nearly two orders of magnitude smaller than the corresponding shifts measured for the low-frequency resonant modes. When combined with previously measured stress shifts and a quasi-harmonic perturbed shell-model calculation, these results firmly establish that the silver ion has a significant quadrupolar deformability, which has been proposed to play an important role in the dynamics of the silver ion in other systems.

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Relaxation of gaseous perturbations after evaporation of metals by nanosecond laser pulses

Дорофеев¹

1990

Sov. J. Quantum Electron.

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The resistance of a lead sample was measured with very high accuracy from 295 K to the melting temperature 600.7 K. Up to about 540 K the resistance is determined by electron-phonon and electron-vacancy scattering with a vacancy formation enthalpy of 0.38 eV. Above 540 K there is an additional term in the resistance, well described by a thermally created defect with a formation enthalpy of 1.42 eV. While the vacancy formation entropy is approximately 1 . 6 k~ the formation entropy of the new defect is approximately 1 6 k~. This leads us to believe that the new defect has a liquid-like structure and consists approximately of a central atom or vacancy plus its nearest neighbours.

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Experimental investigation of the interaction of rhodamine 6G laser radiation with aluminum

Cited by 3 publications

References 1 publication

Plasma Torch Development and Crater Growth Dynamics in the Course of Laser Processing of Materials and its Diangostics

Plasma Torch Development and Crater Growth Dynamics in the Course of Laser Processing of Materials and its Diangostics

Influence of the laser wavelength on the threshold of plasma formation as a result of irradiation of opaque materials

Relaxation of gaseous perturbations after evaporation of metals by nanosecond laser pulses

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