Готові списки джерел за темами / Laser plasma radiation

Добірка наукової літератури з теми "Laser plasma radiation"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Laser plasma radiation"

1

Duston, Dwight. "Ionization–radiation physics of laser fusion: the modeler's view." Canadian Journal of Physics 64, no. 8 (August 1, 1986): 998–1005. http://dx.doi.org/10.1139/p86-170.

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Of the many physics issues involved in laser fusion, one of the least understood is the role of ionization and radiation in laser-heated plasmas. Ionization and excitation processes are important since they serve as an energy sink, as well as affecting the various transport coefficients. In addition, the radiative processes occurring in the plasma can not only act as a depletion mechanism for the energy but can also redistribute internal plasma energy from the deposition region to other plasma regions inaccessible via other phenomena. This presentation will be from the point of view of the modeler, whose job it is to make sense of the passive-radiative data obtained by the experimentalist as well as to explain the unobservable phenomena taking place via sophisticated computer models of atomic and radiation physics. Three areas will be discussed: (i) an introduction to the numerical modeling of ionization–radiation in laser plasmas, (ii) radiation diagnostics for laser fusion, and (iii) radiation energetics in laser plasmas.
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2

Masnavi, Majid, and Martin Richardson. "Spectroscopic Studies of Laser-Based Far-Ultraviolet Plasma Light Source." Applied Sciences 11, no. 15 (July 27, 2021): 6919. http://dx.doi.org/10.3390/app11156919.

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A series of experiments is described which were conducted to measure the absolute spectral irradiances of laser plasmas created from metal targets over the wavelength region of 123–164 nm by two separate 1.0 μm lasers, i.e., using 100 Hz, 10 ns, 2–20 kHz, 60–100 ns full-width-at-half-maximum pulses. A maximum radiation conversion efficiency of ≈3%/2πsr is measured over a wavelength region from ≈125 to 160 nm. A developed collisional-radiative solver and radiation-hydrodynamics simulations in comparison to the spectra detected by the Seya–Namioka-type monochromator reveal the strong broadband experimental radiations which mainly originate from bound–bound transitions of low-ionized charges superimposed on a strong continuum from a dense plasma with an electron temperature of less than 10 eV.
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3

Hematizadeh, A., F. Bakhtiari, S. M. Jazayeri, and B. Ghafary. "Strong terahertz radiation generation by beating of two laser beams in magnetized overdense plasma." Laser and Particle Beams 34, no. 3 (July 22, 2016): 527–32. http://dx.doi.org/10.1017/s0263034616000410.

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AbstractTerahertz (THz) radiation generation by nonlinear mixing of two laser beams, obliquely incident on an overdense plasma is investigated. In an overdense plasma, the laser beams penetrate to only thin layer of a plasma surface and reflected. At this thin layer, the laser beams exert a ponderomotive force on the electrons of plasma and impart them oscillatory velocity at the different frequency of lasers. THz waves appear in the reflected component from the plasma surface. The amplitude of THz waves can be augmented by applying the magnetic field perpendicular to the direction of propagation of lasers. It is found that the field strength of the emitted THz radiations is sensitive to the angle of incident of the laser beams, beat frequency, and magnetic field strength. In this scheme, the magnetic field strength plays an important role for strong THz wave generation.
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4

Min, Q., X. B. Liu, M. G. Su, Y. H. Wu, D. X. Sun, S. Q. Cao, and C. Z. Dong. "Numerical simulation of the effect of laser wavelength on nanosecond laser ablation and plasma characteristic." Physics of Plasmas 29, no. 5 (May 2022): 052103. http://dx.doi.org/10.1063/5.0084874.

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Based on the heat conduction equation, hydrodynamics equations, and radiation transport equation, a two-dimensional axisymmetric radiation hydrodynamics model is developed. The charge state distribution and energy level population in the plasma are solved by the collisional-radiative model using screened hydrogenic levels. The model is used to study the effect of excitation laser wavelength at 1064 and 266 nm on aluminum target evolution, plasma generation, laser absorption in the plasma, and the plasma characteristic during laser ablation in the presence of atmospheric pressure. For 1064 nm radiation, the evaporation of the target surface stops earlier and the plasma formation time is later. The plasma has higher temperature as well as density and the hottest region is at the forefront of the plasma. The plasma shielding effect resulted in a sharp decrease in the laser transmissivity of 1064 nm radiation to about 0.1%, while the transmissivity of 266 nm radiation only decreased to about 30%. The inverse bremsstrahlung is the most important laser absorption mechanism for 1064 nm, whereas photoionization dominates the entire absorption process in the case of 266 nm radiation. The effect of the plasma model on optical breakdown has been present. The results show that neither breakdown nor plasma formation is encountered if the local thermodynamic equilibrium model is used in 266 nm radiation.
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5

Magesh Kumar, K. K., M. Kumar, T. Yuan, Z. M. Sheng, and M. Chen. "Terahertz radiation from plasma filament generated by two-color laser gas–plasma interaction." Laser and Particle Beams 33, no. 3 (June 10, 2015): 473–79. http://dx.doi.org/10.1017/s0263034615000518.

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AbstractWe develop a theoretical model for terahertz (THz) radiation generation, when an intense short laser pulse (ω1, k1) is mixed with its frequency shifted second harmonic (ω2, k2), where ω2 = 2ω1 + ωT and ωT is in the THz range in the plasma. The lasers exert a ponderomotive force on the electrons and drive density perturbations at (2ω1, 2k1) and (ω2 − ω1, k2 − k1). These density perturbations couple with the oscillatory velocities of the electron due to the lasers and produce a nonlinear current at (ω2 − 2ω1, k2 − 2k1). This current acts as an antenna to produce the THz radiation. The THz power depends upon the square of plasma density and $I_1^2 {I_2}$, where I1 and I2 are the intensities of fundamental and second harmonic laser. The radiation is mainly along the forward direction. Two-dimensional particle-in-cell simulations are used to study the near-field radiation properties.
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6

Bazylev, B. N., F. N. Borovik, G. A. Vergunova, S. I. Kaskova, G. S. Romanov, V. B. Rozanov, L. K. Stanchits, K. L. Stepanov, and A. V. Teterev. "Nonequilibrium emission from laser-generated target plasma." Laser and Particle Beams 6, no. 4 (November 1988): 709–21. http://dx.doi.org/10.1017/s0263034600005656.

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Radiation characteristics of laser targets are studied in the soft X-ray region where photorecombination, bremsstrahlung and transitions in the discrete spectrum are the basic mechanisms of spectrum formation. The impact-radiational model is employed to describe the states of the laser target plasma. Characteristics obtained from the solution of the kinetic problem are used to compute absorption and emission coefficients. To set the time scale for a given field of gas-dynamic parameters, the transfer equation is solved and detailed information is obtained on the spectral composition of the outgoing radiation and its temporal evolution. Effective emission temperatures and radiation losses are determined. Integral radiation parameters are compared which have been derived from the solution of the transfer equation employing a volume luminescence approximation.
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7

Oks, Eugene. "Method for Measuring the Laser Field and the Opacity of Spectral Lines in Plasmas." Plasma 4, no. 1 (January 20, 2021): 65–74. http://dx.doi.org/10.3390/plasma4010003.

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Анотація:
In experimental studies of laser-plasma interactions, the laser radiation can exist inside plasma regions where the electron density is below the critical density (“underdense” plasma), as well as at the surface of the critical density. The surface of the critical density could exhibit a rich physics. Namely, the incident laser radiation can get converted in transverse electromagnetic waves of significantly higher amplitudes than the incident radiation, due to various nonlinear processes. We proposed a diagnostic method based on the laser-produced satellites of hydrogenic spectral lines in plasmas. The method allows measuring both the laser field (or more generally, the field of the resulting transverse electromagnetic wave) and the opacity from experimental spectrum of a hydrogenic line exhibiting satellites. This spectroscopic diagnostic should be useful for a better understanding of laser-plasma interactions, including relativistic laser-plasma interactions.
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8

Brunner, W., R. W. John, H. Paul, and H. Steudel. "Radiation reabsorption in a laser-produced plasma." Laser and Particle Beams 6, no. 4 (November 1988): 723–29. http://dx.doi.org/10.1017/s0263034600005668.

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Taking into account the emission and absorption of resonance radiation in a recombining laser-produced plasma of intermediate density, the system of rate equations for the population densities coupled with the radiative transfer equation is approximately treated. In the case of spatially varying absorption we derive an approximate form of the rate equation determining the population density of the upper resonance level. By applying this relation to an axially symmetric plasma a simple formula that describes the effect of radiation reabsorption on the spatial behaviour of the population density is obtained.
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9

Takabe, H., T. Nishikawa, and S. Nakamura. "Non-LTE atomic modeling for laser-produced plasmas." Laser and Particle Beams 11, no. 1 (March 1993): 119–26. http://dx.doi.org/10.1017/s0263034600006972.

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Atomic modeling of high-Z partially ionized plasma is essential for simulating radiation hydrodynamics of laser-produced plasma. A collisional-radiative model based upon an average atom model is used to calculate plasma opacity and emissivity. Because line radiations are most dominant in such plasma, the detail configuration accounting (DCA) for electronic state is required. We propose a statistical method to carry out the DCA with the use of the average population of bound electrons. Further modeling of line group made of the same transition from ions in different change states is discussed by considering the detail structure (hierarchy) of the line group.
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10

Bakos, J. S., I. B. Földes, P. N. Ignácz, M. Á. Kedves, and J. Szigeti. "Radiation imprisonment in laser blow-off plasma." Laser and Particle Beams 10, no. 4 (December 1992): 715–21. http://dx.doi.org/10.1017/s0263034600004651.

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Sodium laser blow-off plasma of low temperature (in the 1-eV range) is generated by laser intensities of 108–5.109 W cm−2. Imprisonment of resonant laser light has been observed. These experiments show that basic processes of interaction of radiation with level populations can be studied in the visible range, where the atomic levels have longer lifetimes than the ionic ones in hot plasmas, corresponding to X-ray generation. The imprisonment and resonant effects with various experimental parameters were investigated together with the nonresonant scattering on fragments.
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Дисертації з теми "Laser plasma radiation"

1

Gallacher, Jordan G. "Relativistic electrons and radiation from intense laser-plasma sources." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=15481.

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2

Hansson, Björn. "Laser-Plasma Sources for Extreme-Ultraviolet Lithography." Doctoral thesis, KTH, Physics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3677.

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This thesis describes the development and characterizationof a liquidxenon- jet laser-plasma source forextreme-ultraviolet (EUV) radiation. It is shown how thissource may be suitable for production-scale EUV lithography(EUVL).

EUVL is one of the main candidates to succeeddeep-ultraviolet (DUV) lithography for large-scalemanufacturing of integrated circuits (IC). However, a majorobstacle towards the realization of EUVL is the currentunavailability of a source meeting the tough requirements onespecially power and cleanliness for operation in an EUVLstepper. The liquid-xenon-jet laser-plasma concept has keyadvantages that may make it suitable for EUVL since, e.g., itsplasma consists only of the inert noble gas xenon and since theliquidjet target technology enables plasma operation at largedistances from the source-hardware thereby reducing sputteringand to allowing for high-power operation.

At the beginning of the work described in this thesis, aspatial instability of the liquid-xenon-jet made stableoperation of a plasma at practical distances from the nozzleorifice dicult. However, an invention of a stabilization methodbased on applying localized heating to the tip of thejet-forming nozzle, resulted in stable jet operation. Thelongitudinal droplet stability of a liquid-droplet laser-plasmasource has also been investigated and improved.

Continuous improvements of especially the laser-power toEUV-radiation conversion eciency (CE) and the stability oflaser-plasma operation at large distances (several centimeter)from the nozzle are reported for the liquidxenon- jet laserplasma source. Furthermore, this source is characterizedregarding many parameters relevant for EUVL operationincluding, ion emission from the plasma and related sputteringof nearby components, source size and shape, therepetition-rate limit of the source and non-EUV emission fromthe plasma.

Although the main focus of the thesis has been thedevelopment and characterization of a liquid-xenon-jetlaser-plasma source for production-scale EUVL, the source mayalso be suitable for small field applications that benefit fromthe high potential brightness of the source. A method to scanthe plasma and thus minimize the photon losses whilemaintaining the object plane uniformity was developed.Furthermore, the first operation of a liquidtin- jet laserplasma is reported. Quantitative EUV flux measurements yieldrecord CE, but quantitative contamination measurements alsoindicate that a liquid-tin-jet laser plasma is not likely to beapplicable as a source for EUVL.

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3

Debus, Alexander. "Brilliant radiation sources by laser-plasma accelerators and optical undulators." Forschungszentrum Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-91303.

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This thesis investigates the use of high-power lasers for synchrotron radiation sources with high brilliance, from the EUV to the hard X-ray spectral range. Hereby lasers accelerate electrons by laser-wakefield acceleration (LWFA), act as optical undulators, or both. Experimental evidence shows for the first time that LWFA electron bunches are shorter than the driving laser and have a length scale comparable to the plasma wavelength. Furthermore, a first proof of principle experiment demonstrates that LWFA electrons can be exploited to generate undulator radiation. Building upon these experimental findings, as well as extensive numerical simulations of Thomson scattering, the theoretical foundations of a novel interaction geometry for laser-matter interaction are developed. This new method is very general and when tailored towards relativistically moving targets not being limited by the focusability (Rayleigh length) of the laser, while it does not require a waveguide. In a theoretical investigation of Thomson scattering, the optical analogue of undulator radiation, the limits of Thomson sources in scaling towards higher peak brilliances are highlighted. This leads to a novel method for generating brilliant, highly tunable X-ray sources, which is highly energy efficient by circumventing the laser Rayleigh limit through a novel traveling-wave Thomson scattering (TWTS) geometry. This new method suggests increases in X-ray photon yields of 2-3 orders of magnitudes using existing lasers and a way towards efficient, optical undulators to drive a free-electron laser. The results presented here extend far beyond the scope of this work. The possibility to use lasers as particle accelerators, as well as optical undulators, leads to very compact and energy efficient synchrotron sources. The resulting monoenergetic radiation of high brilliance in a range from extreme ultraviolet (EUV) to hard X-ray radiation is of fundamental importance for basic research, medical applications, material and life sciences and is going to significantly contribute to a new generation of radiation sources and free-electron lasers (FELs).
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4

Bellei, Claudio. "Measurements of optical radiation from high-intensity laser-plasma interactions." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5372.

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This thesis presents experimental and theoretical results on the interaction of high-intensity lasers with solid and gaseous targets. All the measurements that are described belong to the optical region of the spectrum. The interaction with solid targets has been investigated for two different intensity regimes. Intensities of up to 10[21] Wcm-2 have been accessed on the VULCAN laser system at the Rutherford Appleton Laboratory whereas the JETI laser system at the Institut für Optik und Quantenelektronik in Jena allowed to reach intensities of up to 4x10[19] Wcm-2 . For both regimes, the transport of relativistic electrons generated in the interactions has been investigated through measurements of the optical radiation emitted from the rear surface of the solid targets. Polarimetry and angular distribution measurements indicate that the radiation presents a high degree of polarisation and is non-isotropically emitted. It is, therefore, mainly attributed to transition radiation. A theoretical model has been developed in order to interpret and validate the experimental observations. As a result, for the high intensity regime variation of the signal strength of the transition radiation with respect to the direction of observation is attributed to the presence of mm-scale filaments. The interaction with gaseous targets has been investigated at the Astra Gemini facility at the Rutherford Appleton Laboratory, for peak intensities of up to 3x10[19] Wcm-2 in a spot size of 20 [Mu]m FWHM. In this experiment the properties of the laser pulse were studied after interaction with the targets. For this purpose, a second harmonic generation FROG device was used. This allowed to determine both the pulse duration and the temporal phase of the pulse, giving an insight on the dependence of the pulse properties with respect to interaction length and electron number density. The experimental results show that the nonlinear evolution of the pulse can lead to compression from 45 fs before the interaction to a single pulse of below 20 fs duration, after propagating in the gaseous medium.
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5

Capdessus, Rémi. "Dynamique d'un plasma non collisionnel interagissant avec une impulsion laser ultra-intense." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR15268/document.

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L'interaction d'un plasma avec une impulsion laser-intense suscite de plus en plus d'intérêt du fait des progrès en matière de technologie laser d'outils numériques. La réaction du rayonnement affecte la dynamique des électrons, celle du rayonnement synchrotron, ainsi que celle des ions via le champ de séparation de charge, pour des intensités laser supérieures à 10puissance22 W/CM2. les équations cinétiques régissant le transport de particules à ultra-haute intensité ont été obtenues. La réaction du rayonnement implique la contraction du volum de l'epace des phases des électrons A l'aide de simulations numériques nous avons démontré la forte rétro-action que les effets collectifs induisent sur le rayonnement synchrotron généré par les électons accélérés. L'importance des effets collectifs dépend fortement de la masse des ions et de l'épaisseur du plasma considéré. Ces effets pourraient être vérifiés expérimentalement avec des cibles cryogéniques d'hydrogène
Résumé en anglais
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6

Mishra, Rohini. "Isochoric heating of thin target by intense laser radiation." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446449.

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7

Kamtaprasad, Reuvani. "LASER PLASMA RADIATION STUDIES FOR DROPLET SOURCES IN THE EXTREME ULTRAVIOLET." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2147.

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The advancement of laboratory based Extreme Ultraviolet (EUV) radiation has escalated with the desire to use EUV as a source for semiconductor device printing. Laser plasmas based on a mass-limited target concept, developed within the Laser Plasma Laboratory demonstrate a much needed versatility for satisfying rigorous source requirements. This concept produces minimal debris concerns and allows for the attainment of high repetition rates as well as the accommodation of various laser and target configurations. This work demonstrates the generation of EUV radiation by creating laser plasmas from mass-limited targets with indium, tin, and antimony doped droplets. Spectral emission from the laser plasmas is quantified using a flat-field spectrometer. COWAN code oscillator strength predications for each of the dopants were convolved with narrow Gaussian functions creating synthetic spectra for the EUV region between 10 nm - 20 nm. A preliminary comparison was made between the theoretical spectra and experimental results. From this comparison, ion stage transitions for each of the hot dense plasmas generated were assessed.
M.S.E.E.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering MSEE
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8

Nomura, Yutaka. "Temporal characterization of harmonic radiation generated by intense laser-plasma interaction." Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/8598/.

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9

Cantono, Giada. "Relativistic Plasmonics for Ultra-Short Radiation Sources." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS353/document.

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La plasmonique étudie le couplage entre le rayonnement électromagnétique et les oscillations collectives des électrons dans un matériel. Les plasmons de surface (SPs), notamment, ont la capacité de concentrer le champ électromagnétique sur des distances micrométriques, ce qui les rend intéressants pour le développement des dispositifs photoniques les plus novateurs. 'Etendre l'excitation de SPs au régime de champs élevés, où les électrons oscillent à des vitesses relativistes, ouvre des perspectives stimulantes pour la manipulation de la lumière laser ultra-intense et le développement de sources de rayonnement énergétiques et à courte durée. En fait, l'excitation de modes résonnants du plasma est l'une des stratégies possibles pour transférer efficacement l'énergie d'une impulsion laser ultra-puissante à une cible solide, cela étant parmi les défis actuels dans la physique de l’interaction laser-matière à haute intensité. Dans le cadre de ces deux sujets, ce travail de thèse démontre la possibilité d'exciter de façon résonnante des plasmons de surface avec des impulsions laser ultra-intenses. Elle étudie comment ces ondes peuvent à la fois accélérer de paquets d'électrons relativistes le long de la surface de la cible mais aussi augmenter la génération d'harmoniques d'ordre élevé de la fréquence laser. Ces deux processus ont été caractérisés avec de nombreuses expériences et simulations numériques. En utilisant un schéma d’interaction standard de la plasmonique classique, les SPs sont excités sur des cibles dont la surface présente une modulation périodique régulière à l'échelle micrométrique (cibles réseau). Dans ce cas, les propriétés de l'émission d'électrons tout comme celles des harmoniques permettent d’envisager leur utilisation dans des application pratiques. En réussissant à dépasser les principaux problèmes conceptuels et techniques qui jusqu'au présent avaient empêché l'application d'effets plasmoniques dans le régime de champs élevés, ces résultats apportent un intérêt nouveau à l'exploration de la Plasmonique Relativiste
Plasmonics studies how the electromagnetic radiation couples with the collective oscillations of the electrons within a medium. Surface plasmons (SPs), in particular, have a well-established role in the development of forefront photonic devices, as they allow for strong enhancement of the local EM field over sub-micrometric dimensions. Promoting the SP excitation to the high-field regime, where the electrons quiver at relativistic velocities, would open stimulating perspectives for the both the manipulation of ultra-intense laser light and the development of energetic, short radiation sources. Indeed, the excitation of resonant plasma modes is a possible strategy to efficiently deliver the energy of a high-power laser to a solid target, this being among the current challenges in the physics of highly-intense laser-matter interaction. Gathering these topics, this thesis demonstrates the opportunity of resonant surface plasmon excitation at ultra-high laser intensities by studying how such waves accelerate bunches of relativistic electrons along the target surface and how they enhance the generation of high-order harmonics of the laser frequency. Both these processes have been investigated with numerous experiments and extensive numerical simulations. Adopting a standard configuration from classical plasmonics, SPs are excited on solid, wavelength-scale grating targets. In their presence, both electron and harmonic emissions exhibit remarkable features that support the conception of practical applications. Putting aside some major technical and conceptual issues discouraging the applicability of plasmonic effects in the high-field regime, these results are expected to mark new promises to the exploration of Relativistic Plasmonics
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10

D'Amico, Ciro. "Filamentation femtoseconde dans les milieux transparents passifs et amplificateurs, et étude de la filamentation comme source de radiation secondaire." Phd thesis, Ecole Polytechnique X, 2007. http://pastel.archives-ouvertes.fr/pastel-00003498.

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Ce travail de thèse peut être divisé en deux parties. Dans la première partie on présente une étude de la filamentation d'impulsions laser femtoseconde dans les milieux Kerr transparents passifs et amplificateurs; les résultats principaux de cette partie sont les suivants: mise en place d'une nouvelle technique (P-scan) pour l'étude des différents régimes de propagation non linéaire d'une impulsion femtoseconde dans les gaz (chapitre III), et mise en évidence de la possibilité d'augmenter l'énergie et la puissance transportées par un seul filament, bien au dessus du seuil d'apparition de multi-filaments (chapitres IV et V). Dans la deuxième partie, on étudie le plasma généré par filamentation en tant que source de radiation électromagnétique secondaire, dans les bandes Ter! ahertz et Radiofréquences. L'étude du filament comme source de radiation Terahertz est décrit dans les chapitres VI, VII et VIII ; elle a amené à la découverte d'un nouveau mécanisme d'émission radiale en présence d'un champ électrique statique longitudinal le long de l'axe du filament. Nous avons aussi découvert un nouveau mécanisme d'émission Terahertz en l'absence de champ appliqué; cette fois la radiation est émise vers l'avant dans un cône fermé autour de l'axe de propagation du filament. Le mécanisme d'émission, modélisé en collaboration avec le Prof. Tikhonchuk de l'Université de Bordeaux 1, s'est révélé être en très bon accord avec les observations expérimentales. Enfin, nous avons mis en évidence la possibilité de transformer un canal de plasma produit par la! ser en une antenne dipolaire, qui peut émettre des radiof! réq uences. Ce sujet est décrit dans le chapitre IX.
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Книги з теми "Laser plasma radiation"

1

Zheng-Ming, Sheng, and Zhang Jie, eds. Asian Summer School on Laser Plasma Acceleration and Radiation: Beijing, China, 7-11 August 2006. Melville, N.Y: American Institute of Physics, 2007.

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2

Ant͡siferov, V. V. Coherent radiation processes in plasma. Cambridge: Cambridge International Science Publ., 1998.

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3

C, Richardson Martin, and Society of Photo-optical Instrumentation Engineers., eds. Applications of laser plasma radiation: 14-16 July 1993, San Diego, California. Bellingham, Wash: SPIE, 1994.

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4

C, Richardson Martin, Kyrala George A, and Society of Photo-optical Instrumentation Engineers., eds. Applications of laser plasma radiation II: 12-14 July 1995, San Diego, California. Bellingham, Wash: SPIE, 1995.

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5

1916-, Prokhorov A. M., ed. Laser heating of metals. Bristol: A. Hilger, 1990.

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6

J, Rose S., and European Conference on Laser Interaction with Matter (23rd : 1994 : St. John's College, University of Oxford), eds. Laser interaction with matter: Proceedings of the 23rd European conference, St. John's College, Oxford, 19-23 September 1994. Bristol: Institute of Physics Pub., 1995.

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7

M, More Richard, North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Study Institute on Laser Interactions with Atoms, Solids, and Plasmas (1992 : Cargèse, France), eds. Laser interactions with atoms, solids, and plasmas. New York: Plenum Press, 1994.

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8

N, Krokhin O., Gusʹkov Sergey Yu, Merkulʹev Yury A, Basov N. G. 1922-, Fizicheskiĭ institut imeni P.N. Lebedeva., Institut obshcheĭ fiziki (Rossiĭskai͡a︡ akademii͡a︡ nauk), and Society of Photo-optical Instrumentation Engineers., eds. ECLIM 2002: 27th European Conference on Laser Interaction with Matter : 7-11 October 2002, Moscow, Russia. Bellingham, Wash., USA: SPIE, 2003.

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9

Milan, Kálal, Rohlena Karel, Šiňor Milan, České vysoké učení technické v Praze., Akademie věd České republiky. Fyzikální ústav., Society of Photo-optical Instrumentation Engineers. Czech & Slovak Chapter., and Society of Photo-optical Instrumentation Engineers., eds. Laser interaction with matter: ECLIM 2000 : 26th European Conference on Laser Interaction with Matter : 12-16 June 2000, Prague, Czech Republic. Bellingham, Washington: SPIE, 2001.

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10

A, Kyrala George, and Society of Photo-optical Instrumentation Engineers., eds. Laser-generated and other laboratory X-ray and EUV sources, optics, and applications: 4-6 August 2003, San Diego, California, USA. Bellingham, Wash., USA: SPIE, 2004.

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Більше джерел

Частини книг з теми "Laser plasma radiation"

1

Mulser, Peter. "Wave Pressure and Transient Radiation Forces." In Laser Interaction and Related Plasma Phenomena, 315–27. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7335-7_25.

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2

Gauduel, Yann A. "Laser-Plasma Accelerators Based Ultrafast Radiation Biophysics." In Biological and Medical Physics, Biomedical Engineering, 19–50. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31563-8_2.

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3

Avetissian, Hamlet K. "Interaction of Superstrong Laser Radiation with Plasma." In Relativistic Nonlinear Electrodynamics, 389–422. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-26384-7_12.

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4

Lee, Yim T., and M. Gee. "Modelling of Intense Line Radiation from Laser-Produced Plasmas." In Laser Interaction and Related Plasma Phenomena, 171–84. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3804-2_11.

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5

He, X. T., T. Q. Chang, and M. Yu. "X-Ray Conversion in High Gain Radiation Drive ICF." In Laser Interaction and Related Plasma Phenomena, 553–64. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3804-2_39.

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6

Chang, T. Q., X. T. He, and M. Yu. "Implosion Characteristics of Radiation-Driven High Gain Laser Fusion." In Laser Interaction and Related Plasma Phenomena, 565–82. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3804-2_40.

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7

Barnouin, O., A. Procoli, H. Chung, and G. H. Miley. "Radiation Damage in Single Crystal CsI(T1) and Polycrystal CsI." In Laser Interaction and Related Plasma Phenomena, 401–9. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3804-2_27.

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8

Rose, Steven J. "The Effect of a Radiation Field on Excitation and Ionisation in Non-LTE High Energy Density Plasmas." In Laser-Plasma Interactions and Applications, 79–89. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00038-1_4.

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9

Brunner, W., and R. W. John. "Decrease of Radiation Trapping in a Laser-Produced Plasma with Volume-Reducing Deviations from Cylindrical Geometry." In Laser Interaction and Related Plasma Phenomena, 105–9. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3324-5_11.

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10

Borovsky, Andrew V., Andrew L. Galkin, Oleg B. Shiryaev, and Thierry Auguste. "Propagation of Laser Radiation in Multiple-Stage Ionized Matter." In Springer Series on Atomic, Optical, and Plasma Physics, 149–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05242-6_10.

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Тези доповідей конференцій з теми "Laser plasma radiation"

1

Rae, Stuart C., and Keith Burnett. "Plasma Reflectivity and Propagation Effects in a Femtosecond Laser Pulse." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/swcr.1991.tua3.

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The development of table-top terawatt lasers, producing intensities of 1015−1018 W/cm2 in pulses of duration on the order of a picosecond or less, has opened up a whole new regime for plasma physics. The interactions occurring in a femtosecond-pulse laser-produced plasma differ in a number of important respects from the traditional mechanisms observed in, for example, an ICF plasma. Much of the interest in the field of femtosecond plasma physics centres on the production of ultrashort pulses of x-rays [1], and there has also been a considerable amount of work devoted to studies of energy absorption, in an attempt to characterise the hot, near-solid-density plasmas produced [2-4].
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2

Forsyth, James M. "Laser-plasma sources for lithography." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/swcr.1991.wb3.

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3

Weyl, Guy M. "Penetration of plasma radiation in tissue." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.mr42.

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Several applications of lasers in medicine, such as laser lithotripsy and plaque removal, involve formation of plasmas. These plasmas will radiate in the IR, visible, and UV. Possible deleterious effects of plasma radiation are tissue damage by heating and chemical changes induced by deposition of UV photons. Of particular concern is the possible mutagenic effects of UV photons that can penetrate the nucleus of cells and be absorbed there.
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4

Song, Y., E. Garate, R. Prohaska, and N. Rosotkar. "Channel radiation X-ray laser." In International Conference on Plasma Sciences (ICOPS). IEEE, 1993. http://dx.doi.org/10.1109/plasma.1993.593260.

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5

Albert, F., B. B. Pollock, J. Shaw, K. A. Marsh, J. E. Ralph, A. Pak, C. E. Clayton, S. H. Glenzer, and C. Joshi. "Betatron radiation from laser plasma accelerators." In SPIE Optics + Optoelectronics, edited by Kenneth W. D. Ledingham, Klaus Spohr, Paul McKenna, Paul R. Bolton, Eric Esarey, Carl B. Schroeder, and Florian J. Grüner. SPIE, 2015. http://dx.doi.org/10.1117/12.2178685.

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6

Remo, John L. "Laser radiation plasma dynamics and momentum coupling." In High-Power Laser Ablation 2008, edited by Claude R. Phipps. SPIE, 2008. http://dx.doi.org/10.1117/12.781905.

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7

Rocca, J. J., M. C. Marconi, M. Villagran Muniz, and D. C. Beethe. "Capillary Discharge Plasmas as Extreme Ultraviolet Laser Sources." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/swcr.1988.swlos99.

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We propose the generation of XUV and soft X-ray laser radiation by electronion recombination in capillary plasmas excited by fast discharges. Highly ionized plasmas are created in a capillary geometry by a high current pulse; subsequently rapid cooling of the plasma occurs by electron heat conduction and radiation. Electron-ion recombination is expected to result in population inversion and gain in 3-2 transitions of hydrogenic ions with wavelengths ranging from the VUV to soft X-rays. We have generated nearly completely ionized helium and lithium capillary plasmas to study the possibility of amplification in the 3-2 hydrogenic lines during plasma recombination. Time resolved XUV spectra of a 500 μm diameter lithium capillary discharge were obtained. The intensity of the LiIII 72.9 nm 3-2 line is observed to increase during the decay of the current pulse. The capillary discharge recombination scheme is expected to advantageously scale to soft X-rays wavelengths. A time dependent collisional-radiative model of the capillary plasmas predicts a gain of 5 cm−1 in the 18.2 nm CVI transition.
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8

Umstadter, D., X. Liu, J. S. Coe, C. Y. Chien, E. Esarey, and P. Sprangle. "Harmonic Generation by an Intense Picosecond Laser in an Underdense Plasma." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/swcr.1991.mc4.

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Modest power lasers interacting with a neutral gas have been observed to produce coherent harmonic radiation (up to the 61 st harmonic) at odd multiples of the fundamental laser frequency[1]. This is a result of the laser field causing the bound electrons to oscillate in the anharmonic atomic potential. The process is limited to relatively low powers since increasing the fundamental laser power leads to ionization of the gas and to the production of unbound electrons. A very high-power laser interacting with a fully ionized plasma, however, may lead to the generation of large levels of coherent radiation at high harmonics (including even harmonics) of the incident laser frequency based on an entirely new mechanism. If the laser pulse is sufficiently intense, the plasma electron mass becomes modulated because of nonlinear relativistic effects [2]. We describe in this paper the theory and some experiments in which we observe signatures of this mechanism.
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9

Sher, M. H., and S. J. Benerofe. "Prepulsing to Increase the Efficiency of Laser-Produced-Plasma Pumped Lasers." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/swcr.1988.swlos60.

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We have demonstrated the use of a low energy prepulse to enhance the soft-x-ray emission of laser produced plasmas in a parameter range which has been used to pump photoionization lasers. We present data on conversion efficiency and output pulse duration as a function of input intensity, pulselength, and prepulse conditions. Our goal in these studies is to allow the design of more efficient short-wavelength photoionization lasers, and to achieve high repetition rate operation of these lasers in the near future.
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10

Liu, X., D. Umstadter, J. S. Coe, and C. Y. Chien. "Density Profile Steepening by the Ponderomotive Force of an Intense Picosecond Laser." In Short Wavelength Coherent Radiation: Generation and Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/swcr.1991.tua4.

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The high-density plasmas produced by the interaction of short-pulse lasers with solid targets have been proposed as candidate coherent x-ray sources [1]. Large absorption of laser light and rapid cooling of the plasma—both of which are required for this scheme to work—depend strongly on the evolution of the electron-density profile during the laser pulse. We report experimental and theoretical results indicating that when the quiver energy of the electrons exceeds their thermal energy, the ponderomotive pressure of the laser significantly modifies the density profile.
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Звіти організацій з теми "Laser plasma radiation"

1

Davis, J. Development of Technologies to Utilize Laser Plasma Radiations Sources for Radiation Effects Sciences. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/900876.

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2

Yin, Lin, Scott Vernon Luedtke, David James Stark, Robert Francis Bird, William David Nystrom, Brian James Albright, and Bjorn Manuel Hegelich. Simulating High Intensity Laser-Plasma Interactions Including Models of Quantum Radiation. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1498014.

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3

Lumplin, Alex. Coherent Optical Transition Radiation Imaging for Laser-Driven Plasma Accelerator Electron-Beam Diagnostics. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1599615.

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4

Kapteyn, Henry C. Annual Scientific Report for DE-FG03-02NA00063 Coherent imaging of laser-plasma interactions using XUV high harmonic radiation. Office of Scientific and Technical Information (OSTI), May 2005. http://dx.doi.org/10.2172/839546.

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5

Kapteyn, Henry. Final Scientific/Technical Report for DE-FG03-02NA00063 Coherent imaging of laser-plasma interactions using XUV high harmonic radiation. Office of Scientific and Technical Information (OSTI), June 2006. http://dx.doi.org/10.2172/884813.

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6

Sizyuk, V., A. Hassanein, V. Morozov, and T. Sizyuk. Heights integrated model as instrument for simulation of hydrodynamic, radiation transport, and heat conduction phenomena of laser-produced plasma in EUV applications. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/932939.

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7

Joshi, Chan. Studies of degenerate and nearly degenerate four wave mixing of laser radiation in plasmas. Office of Scientific and Technical Information (OSTI), December 1990. http://dx.doi.org/10.2172/6311216.

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8

Measures, R. M. The Application of Laser Saturation to the Efficient Generation of Short WaveLength Radiation from Plasmas. Fort Belvoir, VA: Defense Technical Information Center, May 1986. http://dx.doi.org/10.21236/ada172945.

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9

Skinner, C. H., and C. Keane. Model for electron cooling by radiation losses in plasmas: application to soft x-ray laser development. Office of Scientific and Technical Information (OSTI), February 1986. http://dx.doi.org/10.2172/5876019.

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