High-Temperature Plasmas Produced by Laser Beam Irradiation of Single Solid Particles

Haught, A.F.

doi:10.1063/1.1761564

Cited by 120 publications

(12 citation statements)

References 9 publications

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“…35 Integrating over the total plasma volume we obtain the following expression: f: foY foX ~= ~~ dx dy dz =~:tLZ J: LX mn(x,y,z,t)(~:rdXdYdZ' (13) where m is the atomic mass of the species in the plasma.…”

Section: Plasma Formation and Initial Isothermal Expansionmentioning

confidence: 99%

Theoretical model for deposition of superconducting thin films using pulsed laser evaporation technique

Singh

Holland

Narayan

1990

Journal of Applied Physics

228

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Normal metal-superconductor decoupling as a source of thermal fluctuation noise in transition-edge sensors J. Appl. Phys. 112, 034515 (2012) Transport critical-current density of superconducting films with hysteretic ferromagnetic dots AIP Advances 2, 022166 (2012) Pressure effects on strained FeSe0.5Te0.5 thin films J. Appl. Phys. 111, 112610 (2012) Magnetoresistance and transistor-like behavior of a double quantum-dot via crossed Andreev reflections J. Appl. Phys. 111, 113905 (2012) What are the internal field and the vortex density along the edges of a coated conductor or a superconducting bridge carrying current?We have theoretically and experimentally analyzed the laser-induced evaporation process for deposition of superconducting thin films from bulk targets. The spatial thickness variations have been found to be significantly different from a conventional thermal deposition process. Unlike a cos () thickness variation expected from a thermal evaporation process, the laser evaporation process is characterized by a forward-directed deposit with a sharp variation in its thickness as a function of distance from the center of the deposit. We have studied in detail the interactions of nanosecond excimer laser pulses with bulk YBa2Cu30, targets leading to evaporation, plasma formation, and subsequent deposition of thin films. A theoretical model for simulating the pulsed laser evaporation (PLE) process has been developed. This model considers an anisotropic three-dimensional expansion of the laser-generated plasma, initially at high temperature and pressure. The forward-directed nature of laser deposition has been found to result from anisotropic expansion velocities of the plasma edges arising due to the density gradients in the gaseous plasma. The physical process of the laser ablation technique for deposition of thin films can be classified into three separate interaction regimes: (i) interaction of the laser beam with the bulk target, (ii) plasma formation and initial isothermal expansion, and (iii) adiabatic expansion leading to deposition of thin films. The first two regimes occur during the time interval of the laser pulse, while the last regime initiates after the laser pulse terminates. Under PLE conditions, the evaporation of the target is assumed to be thermal in nature, while the plasma expansion dynamics is non thermal as a result of interaction of the laser beam with the evaporated material. The expansion velocities of the plasma edges are related to the initial dimensions and temperature of the plasma, and the atomic weight of the respective species present in it. Preliminary calculations have been carried out on spatial thickness variations as a function of various parameters in PLE deposited thin fi1ms. The effects of the various beam and substrate parameters induding energy density and substrate-target distance affecting the nature of deposition of superconducting thin films have been theoretically examined. Experimental results have been obtained from thin films deposited on silicon su...

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Section: Plasma Formation and Initial Isothermal Expansionmentioning

confidence: 99%

Theoretical model for deposition of superconducting thin films using pulsed laser evaporation technique

Singh

Holland

Narayan

1990

Journal of Applied Physics

228

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“…This power loss must be offset by the thermonuclear power P T Vpo For the present case, P T V, == 10 8 W. Thus the criterion for net energy release is Dean: Confinement of Laser-Produced Plasma 385 Q 2.3 X 10 9 ' (7) hich implies that Q > 2.3 X 10 9 for net energy release.…”

Section: (6)mentioning

confidence: 82%

Confinement of Laser‐produced Plasma in Resonant Cavities by Rf Electromagnetic Fields

Dean¹

1975

Annals of the New York Academy of Sciences

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“…The breakdown process has been studied in the rare gases [Meyerand and Haught, 1963;Gill and Dougal, 1965], and the exact mechanism is still an open question. Production of plasmas from small solid particles suspended in a vacuum by electromagnetic means has been accomplished [Haught, 1965].…”

Section: Electromagnetic Wave Propagation and Scattering In Plasmasmentioning

confidence: 99%

U.S.A. National Committee Report, Fifteenth URSI Assembly, Munich, September 1966: Radio Electronics; Progress in Radio Electronics

Heffner¹,

Gould²,

Siegman³

et al. 1966

Radio Science

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The generation of new laser devices, techniques, ideas, and applications continued at an unslowing pace during 1963–1966. While no large‐scale or commercially important laser applications have yet emerged, lasers have found innumerable and often irreplaceable applications both in science and in technology. Increasing numbers of useful commercial applications are slowly beginning to emerge at the end of the period.

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High-Temperature Plasmas Produced by Laser Beam Irradiation of Single Solid Particles

Cited by 120 publications

References 9 publications

Theoretical model for deposition of superconducting thin films using pulsed laser evaporation technique

Theoretical model for deposition of superconducting thin films using pulsed laser evaporation technique

Confinement of Laser‐produced Plasma in Resonant Cavities by Rf Electromagnetic Fields

U.S.A. National Committee Report, Fifteenth URSI Assembly, Munich, September 1966: Radio Electronics; Progress in Radio Electronics

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