Дисертації з теми "Laser plaama"
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McKenna, RossAllan D. "A study of laser plasma interactions in a cylindrical cavity." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29588.
Повний текст джерелаScience, Faculty of
Physics and Astronomy, Department of
Graduate
Maitrallain, Antoine. "Accélération laser-plasma : mise en forme de faisceaux d’électrons pour les applications." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS314/document.
Повний текст джерелаLaser plasma acceleration (LPA) comes from the nonlinear interaction between an intense laser beam (≈10¹⁸ W/cm²) and a gas target. The plasma wave which is generated can, trap and accelerate electrons to very high energies due to large accelerating fields (≈ 50 GV/m). Numerous studies have been done on this promising process among our scientific community aiming at understanding the basic mechanisms involved. As a second step, we now try tries to improve the properties of the source (energy, divergence, reproducibility…).Such ultra-compact electronic sources can be used for various applications. Among them, high energy physics for which a specific scheme was designed, based on the multi-stage acceleration. The scheme relies on the addition of successive accelerating modules to increase the effective accelerating length and therefore the final electron energy. In its basic version, a first stage (injector) delivers an electron beam at moderate energy including a high charge. This beam is then further accelerated to high energy through a second stage (accelerator). This thesis is part of preliminary studies performed to prepare the future 2-stages laser plasma accelerator that will be developed on platform CILEX with APOLLON 10 PW laser.In this context, a new target has been designed and characterized with the UHI100 laser. Then the electron beam properties have been adjusted by optical shaping of the laser generating the plasma wave, and also by magnetic shaping.The electron beam, magnetically shaped, has been used for a specific application devoted to the set-up of a new dosimetric diagnostic, dedicated to the measurement of high dose rate delivered by these electrons from LPA
Dyson, Anthony Edmund. "Measurements on under-dense plasmas with intense lasers and experiments on the laser-plasma beat wave." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47418.
Повний текст джерелаLui, Siu Lung. "Spectrochemical analysis of solid samples using resonance-enhanced laser-induced plasma spectroscopy." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/620.
Повний текст джерелаEl-Rabii, Hazem. "Etude à l'allumage par laser de mélanges en phases liquides dispersées et gazeuses." Châtenay-Malabry, Ecole centrale de Paris, 2004. http://www.theses.fr/2004ECAP0959.
Повний текст джерелаMollica, Florian. "Interaction laser-plasma ultra-intense à densité proche-critique pour l'accélération d'ions." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX058/document.
Повний текст джерелаInteraction of ultra-intense, ultra-short laser with matter gives rise to a wealth of phenomena, due to the coupling between the electromagnetic field and the plasma. The non-linear coupling excites collective plasma processes able to sustain intense electric fields up to 1TV/m. This property spurred early interest in laser accelerator as compact, next-generation source of accelerated electrons and ions. Laser-driven ion source of several MeV was demonstrated in early 2000 an various mechanisms had been suggest to improve the their properties. These first ion sources have been obtained on solid targets, called “overdense”. Target innovation has driven the improvement of these sources. In the continuity of this dynamic, new gaseous targets had been proposed in order to relax the constraints that solid targets impose on laser contrast and repetition rate. Recent experimental demonstrations of monoenergetic ion acceleration in gas renew the interest in such targets, called under-dense or near-critical because of their intermediate densities. At near-critical density the laser can propagate, but undergoes significant absorbtion, giving rise to the accelerating structures of plasma shocks and magnetic vortex.The work presented in this thesis is an experimental exploration of the plasma conditions required to drive ion acceleration in gaseous near-critical target. For the first time, these regimes are explored with an ultra-intense, femtosecond laser of 150TW. A part of this work has been dedicated to the design of an innovative gas target, suited for plasma density and gradient constraints set by these regimes. Then the experimental works describe laser propagation and electron acceleration in near-critical targets. Finally the last part report the efficient production of an atomic beam from a laser-driven ion source
Holden, Philip Bernard. "Numerical modelling of laser produced plasmas as XUV lasers." Thesis, University of York, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292556.
Повний текст джерелаCarrer, Eric. "Etude expérimentale de l'influence d'une couverture gazeuse sur les plasmas créés lors du soudage par laser." Aix-Marseille 2, 1986. http://www.theses.fr/1986AIX22011.
Повний текст джерелаGrimes, Mikal Keola. "Vacuum heating absorption and expansion of solid surfaces induced by intense femtosecond laser irradiation /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаNg, Lun Chiu. "Spatial and temporal probing of particle density in UV laser generated plasma and high pressure TE discharge plasma." HKBU Institutional Repository, 1994. http://repository.hkbu.edu.hk/etd_ra/11.
Повний текст джерелаWinters, Caroline. "Laser Diagnostics of Reacting Molecular Plasmas for Plasma Assisted Combustion Applications." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503306596261748.
Повний текст джерелаChan, Sui Yan. "Resonance-enhanced laser-induced plasma spectroscopy for elemental analysis." HKBU Institutional Repository, 1999. http://repository.hkbu.edu.hk/etd_ra/184.
Повний текст джерелаSoubacq, Stéphane. "Etude de la détente dynamique d'un plasma laser. : Influence du champ effectif laser." Pau, 2003. http://www.theses.fr/2003PAUU3022.
Повний текст джерелаThe first objective of this thesis was to analyze the breakdown of an air gap subjected to an high voltage and irradiated by a Nd:YAG laser. Experimental measurements of the breakdown thresholds show a dependence on the gas pressure. The introduction of the effective laser field on the time lag to breakdown allows to render an account of the experimental measurements. The second objective concerned a modeling of the optical gas breakdown. For the preionization phase, we simulated the evolution of the electronic density and temperature (ne1019cm-3, Te4×104K). The dynamic phase was modelized using a 2D aerodynamic code. The numerical results relating to only the neutrals at the LTE, describe the physical phenomena correctly (ellipsoidal shape, u104m/s, ne1018cm-3, T105K). Measurements of plasma expansion velocity, as well as electronic density measured by laser interferometry were carried out and compared with the numerical results
Depresseux, Adrien. "Development of an ultrashort and intense collisional OFI plasma-based soft X-ray laser." Palaiseau, Ecole polytechnique, 2015. https://tel.archives-ouvertes.fr/tel-01233246/document.
Повний текст джерелаCampos, Delton de Oliveira. "Plasma produzido por laser em um sólido de nióbio e estudo de suas propriedades." [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277962.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-09-26T18:12:42Z (GMT). No. of bitstreams: 1 Campos_DeltondeOliveira_M.pdf: 1207997 bytes, checksum: 40c7711566b401302a15aee06044ac0a (MD5) Previous issue date: 1986
Resumo: Montamos um sistema para produção de plasma a partir da incidência da luz de um laser na superfície de um material sólido em alto vácuo. Utilizando um cristal de Nióbio, estudamos o plasma formado quando incidimos um pulso de um laser de rubi (13OMW, 5Ons) em sua superfície plana com incidência de 35 graus com relação à normal. As técnicas experimentais que utilizamos se basearam em: I - Espectroscopia no Visível a) Registro e análise do espectro do plasma utilizando filme fotográfico e um analisador óptlco de multicanais (OMA) acoplados a um espectrômetro, o que permitiu a identificação de algumas linhas do espectro e determinação da temperatura do plasma em expansão. b) Estudo da evolução temporal de uma linha do espectro, permitindo a determinação da velocidade de expansão do plasma. II - Observações com uma câmera conversora de imagens (IMACON), que é uma câmera que registra eventos luminosos em intervalos de tempo ultracurtos. III - Observação da forma e medida da área das "crateras" formadas na superfície do cristal, devido à incidência do laser, por microscopia eletrônica
Abstract: Not informed
Mestrado
Física
Mestre em Física
Déchard, Jérémy. "Sources térahertz produites par des impulsions laser ultra-intenses." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS358/document.
Повний текст джерелаFemtosecond laser pulses trigger extreme nonlinear events inmatter, leading to intense secondary radiations spanning the frequency rangesfrom terahertz (THz) to X and gamma-rays.This work is dedicated to the theoretical and numerical study of THz radiationgenerated by laser-driven plasmas. Despite the inherent difficulty in accessingthe THz spectral window (0.1-100 THz), many coming applications use theability of THz frequencies to probe matter (spectroscopy, medicine, materialscience). Laser-driven THz sources appear well-suited to provide simultaneouslyan energetic and broadband signal compared to other conventional devices. Ourgoal is to investigate previously little explored interaction regimes in orderto optimize the laser-to-THz conversion efficiency.Starting from classical interactions in gases, we validate a unidirectionalpropagation model accounting for THz pulse generation, which we compare to theexact solution of Maxwell's equations. We next increase the laser intensityabove the relativistic threshold in order to trigger a nonlinear plasma wave inthe laser wake, accelerating electrons to a few hundreds of MeV. We show thatthe standard photocurrent mechanisms is overtaken by coherent transitionradiation induced by wakefield-accelerated electron bunch. Next, successivestudies reveal the robustness of this latter process over a wide range of plasmaparameters. We also demonstrate the relevance of long laser wavelengths inaugmenting THz pulse generation through the ionization-induced pressure thatincreases the laser ponderomotive force. Finally, THz emission from laser-solidinteraction is examined in the context of ultra-thin targets, shedding light onthe different processes involved
Audet, Thomas. "Développement d'un injecteur pour l'accélération laser plasma multi-étages." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS424/document.
Повний текст джерелаLaser wakefield acceleration (LWFA) is a particle acceleration process relying on the interaction between high intensity laser pulses, of the order of 10^{18} W/cm² and a plasma. The plasma wave generated in the laser wake sustain high amplitude electric fields (1-100 GV/m). Those electric fields are three orders of magnitude higher than maximum electric fields in radio frequency cavities and represent the main benefit of LWFA, allowing more compact acceleration. However improvements of the LWFA-produced electron bunches properties, stability and repetition rate are mandatory for LWFA to be usable for applications.A scheme to improve electron bunches properties and to potentially increase the repetition rate is multi-stage LWFA. The laser plasma electron source, called the injector, has to produce relatively low energy (50-100 MeV), but high charge, small size and low divergence electron bunches. Produced electron bunches then have to be transported and injected into a second stage to increase electron kinetic energy.The subject of this thesis is to study and design a laser wakefield electron injector for multi-stage LWFA. In the frame of CILEX and the two-stages LWFA program, a prototype of the injector was built : ELISA consisting in a variable length gas cell. The plasma electronic density, which is a critical parameter for the control of the electron bunches properties, was characterized both experimentally and numerically. ELISA was used at two different laser facilities and physical mechanisms linked to electron bunches properties were studied in function of experimental parameters. A range of experimental parameters suitable for an laser wakefield injector was determined.A magnetic transport and diagnostic line was also built, implemented and tested at the UHI100 laser facility of the CEA Saclay. It allowed a more precise characterization of electron bunches generated with ELISA as well as an estimation of the quality of transported electron bunches for their injection in a second laser wakefield stage
Zemzemi, Imene. "High-performance computing and numerical simulation for laser wakefield acceleration with realistic laser profiles." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX111.
Повний текст джерелаThe advent of ultra-short high-intensity lasers has paved the way to new and promising, yet challenging, areas of research in laser-plasma interaction physics. The success of building petawatt femtosecond lasers offers a promising path for designing future particle accelerators and light sources.Achieving this goal intrinsically relies on the combination of experiments and numerical modeling. So far, Particle-In-Cell (PIC) codes have been the ultimate tool to accurately describe the laser-plasma interaction especially in the field of Laser WakeField Acceleration (LWFA). Nevertheless, the numerical modeling of laser-plasma accelerators in 3D can be a very challenging task due to their high computational cost.A useful approach to speed up such simulations consists of employing reduced numerical modes which simplify the problem while retaining a high fidelity.Among these models, Fourier field decomposition in azimuthal modes for the cylindrical geometry is particularly well suited for physical problems with close to cylindrical symmetry, which is the case in LWFA.During my Ph.D., I first implemented this method in the open-source code SMILEI in the Finite Difference Time Domain (FDTD) discretization scheme for the Maxwell solver. However, this kind of solvers may suffer from numerical Cherenkov radiation (NCR). To mitigate this artifact, I also implemented Maxwell’s solver in the Pseudo Spectral Analytical Domain (PSATD) scheme which offers better accuracy of the results.This method is then employed to study the impact of realistic laser profiles from the Apollon facility on the quality of the accelerated electron beam. Its ability to correctly model the involved physical processes is investigated by determining the optimal number of modes and benchmarking its results with full 3D Cartesian simulations. It is shown that the imperfections in the laser pulse lead to differences in the results compared to theoretical profiles. They degrade the performance of laser-plasma accelerators especially in terms of the quantity of injected charge. These simulations, insightful for the future experiments of LWFA that will be held soon with the Apollon laser, put forward the importance of including realistic lasers in the simulation to obtain reliable results
Bajlekov, Svetoslav. "Towards a free-electron laser driven by electrons from a laser-wakefield accelerator : simulations and bunch diagnostics." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:99f9f13a-d0c2-4dd8-a9a4-13926621c352.
Повний текст джерелаFlacco, Alessandro. "Experimental study of proton acceleration with ultra-high intensity, high contrast laser beam." École polytechnique, 2010. http://www.theses.fr/2008EPXX0071.
Повний текст джерелаThe production of energetic proton/ion beams with laser pulses at relativistic intensities (I>10^{18}W/cm^2) has received, in the past few years, increasing interest from the scientific community in plasma, optics and accelerator physics. A fraction of electrons is heated to high temperature during the ultrafast interaction between a femtosecond laser pulse and an overdense plasma. Ions and protons are extracted and accelerated by the charge separation set up during the expansion of the plasma. The results presented in this manuscript report on the realization of ion acceleration experiments using a high contrast (XPW) multi-terawatt laser system. Two preparatory experiments are set up, aiming to study the pedestal of a laser pulse interacting with the target. The expansion of a plasma created by a laser at moderate intensity is measured by interferometry; the evolution of the density gradient length is deduced from the electron density maps at different moments. The variation of the absolute reflectivity of a thin aluminium foil is correlated to the electron temperature and is used to monitor the arrival time of the laser produced shock. The crossing between the two experiments is finally used to define the optimum condition for proton acceleration. Proton acceleration experiments with high contrast laser are reported, including the construction and the validation of a real-time, single shot ion spectrometer (Micro-channel Plate and Thomson Parabola), and other details of the realised setup. The obtained results show that the increased contrast enables the use of thinner targets and the production of more stable and controllable interaction conditions. Proton beams with kinetic energy higher than 4 MeV are produced, with a shot-to-shot stability better than 4% rms. Proton acceleration experiment with two laser beams confirms that the laser energy absorption is enhanced when the target is pre-heated by a laser pulse with proper parameters
Blackburn, Thomas George. "QED effects in laser-plasma interactions." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:d026b091-f278-4fbe-b27e-bd6af4a91b7a.
Повний текст джерелаMonchocé, Sylvain. "Contrôle et métrologie de la génération d'harmoniques sur miroir plasma." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112344.
Повний текст джерелаWhen an ultra intense femtosecond laser with high contrast is focused on a solid target, the laser field at focus is sufficient enough to completely ionize the target surface during the rising edge of the laser pulse and form a plasma. This dense plasma entirely reflects the incident beam in the specular direction: this is a so-called plasma mirror. As the interaction between the laser and the plasma mirror is highly non-linear, it thus leads to the high harmonic generation (HHG) in the reflected beam. In the temporal domain, this harmonic spectrum is associated to a train of attosecond pulses.The aim of my PhD were to experimentally control this HHG and to measure the properties of the harmonics. We first studied the optimization of the harmonic signal, and then the spatial characterization of the harmonic beam in the far-field (harmonic divergence). These characterizations are not only important to develop an intense XUV/attosecond light source, but also to get a better understanding of the laser-matter interaction at very high intensity. We have thus been able to get crucial information of the electrons and ions dynamics of the plasma, showing that the harmonics can also be used as a diagnostic of the laser-plasma interaction.We then developed a new general approach for optically-controlled spatial structuring of overdense plasmas generated at the surface of initially plain solid targets. We demonstrate it experimentally by creating sinusoidal plasma gratings of adjustable spatial periodicity and depth, and study the interaction of these transient structures with an ultraintense laser pulse to establish their usability atrelativistically high intensities. We then show how these gratings can be used as a `spatial ruler' to determine the source size of the high-order harmonic beams roduced at the surface of an overdense plasma. These results open new directions both for the metrology of laser-plasma interactions and the emerging field of ultrahigh intensity plasmonics
Gangolf, Thomas. "Intense laser-plasma interactions with gaseous targets for energy transfer and particle acceleration." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX110.
Повний текст джерелаLaser-matter interaction is studied mostly with near-infrared (NIR) lasers as they can generate the most intense pulses. For these lasers, targets between 0.05 to 2.5 times the critical density are challenging to create but offer interesting prospects. In this thesis, novel high-density Hydrogen gas jet targets with densities in this range are used in view of two applications:First, ions are accelerated by collisionless shock acceleration (CSA). Upon interaction of a NIR laser with a slightly overcritical gas jet target, a collimated, quasi-monoenergetic proton beam is generated in forward direction. Simulations indicate the formation of a collisionless shock and acceleration of protons both by the shock and target normal sheath acceleration (TNSA) on the target rear surface under these conditions. These directed, monoenergetic particle bunches are more suitable for many applications than the broadband particle beams already generated routinely.Second, at densities between 0.05 and 0.2 times the critical density, energy is transferred from one laser pulse (pump) to a counterpropagating pulse (seed), via Stimulated Brillouin Backscattering in the strongly-coupled regime (sc-SBS). For the case of broad- band (60 nanometers) pulses, the role of the preionization for pulse propagation and both spontaneous and stimulated Brillouin backscattering are studied, including the influence of the chirp. It is shown that for narrower bandwidths, the seed pulse is ampli- fied by tens of millijoules, and signatures of efficient amplification and pump depletion are found. This concept aims at amplifying laser pulses to powers above the damage thresholds of solid state amplifiers
Chiaramello, Marco. "Laser amplification via stimulated Brillouin scattering in the strongly coupled regime : towards control and optimization." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066304/document.
Повний текст джерелаThe use of plasma as an amplification medium is currently discussed because it can overcome current solid-state technology limitations in terms of maximum achievable intensity. Via parametric scattering off a plasma oscillation the energy from a long pump pulse can be transferred into a short seed pulse. Brillouin scattering has the potential to become a robust amplification process. In this thesis we present theoretical and numerical (PIC) studies aimed at better understanding the role of each plasma parameter on the amplification mechanism: the interaction length, the shape of the density profile, the duration of the long pump signal, the relative delay between the seed and pump signals, the chirp of the long pump laser pulse. For the first time we show complete description of the time and space evolution of the phases of the pump, seed and plasma density perturbation that dictate the energy flow transfer between the pump and seed laser beams and the efficiency of amplification. In order to propose and improve nowadays experimental set-ups, a comparison with recent experiments is performed
Baudelet, Matthieu. "Propriétés physico-chimiques du plasma induit par laser en régimes nanoseconde et femtoseconde : applications analytiques aux bactéries et aux produits agroalimentaires." Lyon 1, 2008. http://www.theses.fr/2008LYO10100.
Повний текст джерелаHeissler, Patrick. "Relativistic laser plasma interaction." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-146019.
Повний текст джерелаVorontsov, Valeriy. "Charge transfer pumping for XUV lasers using femtosecond laser induced plasmas interacting with neutrals from a pulsed gas jet." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975151150.
Повний текст джерелаAmponsah-Manager, Kwabena. "Microchip lasers as sources of laser-induced breakdown spectroscopy plasma characteristics and analytical performance /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011595.
Повний текст джерелаOsman, Frederick. "Nonlinear paraxial equation at laser plasma interaction /." [Campbelltown, N.S.W. : The author], 1998. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030707.114012/index.html.
Повний текст джерелаComet, Maxime. "Excitation du 201 Hg dans les plasmas produits par laser." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0458/document.
Повний текст джерелаThe use of high power lasers allows the study of the properties of matter in extremeconditions of temperature and density. Indeed, the interaction of a power laser and atarget creates a plasma in which the temperature is high enough to reach important degrees of ionization. These conditions can allow the excitation of the nucleus. Anucleus of interest to study the processes of nuclear excitation is the 201 Hg. Thiswork aims to design an experiment where the 201 Hg excitation will be observed in aplasma produced by a high power laser. The first part of this manuscript presents the calculation of the expected nuclear excitation rates in the plasma. For about ten years, nuclear excitation rates have been calculated using the average atom model. To validate this model a code named ADAM (french acronym for Beyond The Average Atom Model) was developed to calculate the nuclear excitation rates under the DCA (Detailed Configuration Accounting) hypothesis. ADAM allows us to deduce the thermo dynamical domain where the nuclear excitation rates determined with the average atom model are relevant. The second part of this manuscript presents the coupling of the excitation rate calculation with a hydrodynamic code to calculate the number of excited nuclei produced in one laser shot for different laser intensity. Finally, in the last part, first experimental approaches which will be used to design an experiment on a laser installation are presented. These approaches are based on the detection and determination of the amount of multicharged ions obtained far from the target (~80 cm). For this purpose, an electrostatic analyzer was used
Gambino, Nadia. "Investigation of laser generated plasmas for astrophysical applications." Thesis, Universita' degli Studi di Catania, 2011. http://hdl.handle.net/10761/343.
Повний текст джерелаMARQUES, JEAN-RAPHAEL. "Creation de plasmas homogenes pour l'excitation d'ondes plasma relativistes par battement d'ondes laser." Paris 11, 1992. http://www.theses.fr/1992PA112260.
Повний текст джерелаRomagnani, L. "Laser-plasma investigations employing laser-driven proton probes." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426587.
Повний текст джерелаQiu, Wenqian. "Modelling of laser-plasma in laser microspectral analysis." Thesis, University of Aberdeen, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386302.
Повний текст джерелаKiehn, G. P. "XUV laser amplication in recombining laser produced plasmas." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379973.
Повний текст джерелаDurand, Magali. "Filamentation laser femtoseconde IR : Interaction de deux filaments et Source de rayonnement secondaire longue distance." Phd thesis, Ecole Polytechnique X, 2011. http://tel.archives-ouvertes.fr/tel-00677376.
Повний текст джерелаBocoum, Maïmouna. "Harmonic and electron generation from laser-driven plasma mirrors." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX023/document.
Повний текст джерелаThe experimental work presented in this manuscript focuses on the non-linear response of plasma mirrors when driven by a sub-relativistic (~10^18 W/cm^2) ultra-short (~30fs) laser pulse. In particular, we studied the generation of attosecond pulses (1as=10^(-18) s) and electron beams from plasma mirror generated in controlled pump-probe experiment. One first important result exposed in this manuscript is the experimental observation of the anticorrelated emission behavior between high-order harmonics and electron beams with respect to plasma scale length. The second important result is the presentation of the « spatial domain interferometry » (SDI) diagnostic, developed during this PhD to measure the plasma expansion in vacuum. Finally, we will discuss the implementation of phase retrieval algorithms for both spatial and temporal phase reconstructions.From a more general point of view, we replace this PhD in its historical context. We hope to convince the reader that through laser-plasma mirror interaction schemes, we could tomorrow conceive cost-efficient X-UV and energetic electron sources with unprecedented temporal resolutions
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.
Повний текст джерелаSingh, Divya. "Collisional effects on THZ radiation generated by laser plasma interaction." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7051.
Повний текст джерелаBiloiu, Ioana A. "Laser induced fluorescence studies of ion acceleration in single and multiple species expanding plasmas." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10036.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xiv, 173 p. : ill. (some col). Vita. Includes abstract. Includes bibliographical references.
Fabretti, Valérie. "Modélisation de l'émission X des raies K. Alpha dans les plasmas créés par impulsion laser ultracourte (sub-picoseconde) et ultra-intense (10 puissance 18W cm-2)." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11075.
Повний текст джерелаCapdessus, Rémi. "Dynamique d'un plasma non collisionnel interagissant avec une impulsion laser ultra-intense." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR15268/document.
Повний текст джерелаRésumé en anglais
Gustas, Dominykas. "High-repetition-rate relativistic electron acceleration in plasma wakefields driven by few-cycle laser pulses." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX118/document.
Повний текст джерелаContinuing progress in laser technology has enabled dramatic advances in laser wakefield acceleration (LWFA), a technique that permits driving particles by electric fields three orders of magnitude higher than in conventional radio-frequency accelerators. Due to significantly reduced space charge and velocity dispersion effects, the resultant relativistic electron bunches have also been identified as a candidate tool to achieve unprecedented sub-10 fs temporal resolution in ultrafast electron diffraction (UED) experiments. High repetition rate operation is desirable to improve data collection statistics and thus washout shot-to-shot charge fluctuations inherent to plasma accelerators. It is well known that high-quality electron beams can be achieved in the blowout, or "bubble" regime, which is at present regularly accessed with ≈ 30 fs Joule-class lasers that can perform up to few shots per second. Our group on the contraryutilized a cutting edge laser system producing few-mJ pulses compressed nearly to a single optical cycle (3.4 fs) to demonstrate for the first time an MeV-grade particle accelerator with properties characteristic to the blowout regime operating at 1 kHz repetition rate. We further investigate the plasma density profile and exact laser pulse waveform effects on the source output, and show that using special gas microjets a charge of tens of pC/shot can be achieved. We expect this technique to lead to a generation of highly accessible and robust instruments for the scientific community to conduct UED experiments or to be used for other applications. This work also serves to expand our knowledge on the scalability of laser-plasma acceleration
Gulko, Ilya Dmitrievich. "Ns Pulse / RF Hybrid Plasmas for Plasma Chemistry and Plasma Assisted Catalysis Applications." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1598271986860656.
Повний текст джерелаGhneim, Said Nimr 1953. "Laser pulse amplification through a laser-cooled active plasma." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276868.
Повний текст джерелаRae, Stuart Campbell. "Short-pulse laser-plasma interactions." Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:c429d2ee-64d4-415a-b799-f5436d19ccc9.
Повний текст джерелаRajendiran, Sudha. "Plasma enhanced pulsed laser deposition." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/20437/.
Повний текст джерелаMine, Takashi. "Laser and plasma air decontamination." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2276/.
Повний текст джерелаKneip, Stefan. "Laser plasma accelerator and wiggler." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5671.
Повний текст джерелаBuffechoux, Sébastien. "Augmentation de l'énergie des faisceaux de proton accélérés par laser ultra-intense et étude des caractéristiques des faisceaux accélérés par laser ultra-court." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00600647.
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