C. Strangio, A. Caruso, S. Gus'kov, V. Rozanov, A. Rupasov
The results of a preliminary experiment on laser foam interaction performed at the ABC installation of the Associazione EURATOM-ENEA sulla Fusione are presented. Plastic foams with density of 5 - 20 mg/cm3 were irradiated with light produced from the neodymium laser of ABC (λ = 1.054 μm) and processed through a proper optical system to produce near field ISI smoothed radiation at ≈1013W/cm2 on the target. The use of a smoothed beam was essential to detect in the plasma and in the accelerated dense phase evolving features related to the target foam structure without mixing with those of the irradiating beam. Structures in the plasma corona and in the dense phase were detected by optical shadography of foam slabs. In the same experiment time-dependent transmission of laser light through slabs of foams was measured by target imaging and masking on a photodiode (bandwidth of the system 5 GHz).
{"title":"Interaction of ISI smoothed laser beams with low-density supercritical foam targets at AEEF ABC facility","authors":"C. Strangio, A. Caruso, S. Gus'kov, V. Rozanov, A. Rupasov","doi":"10.1117/12.533840","DOIUrl":"https://doi.org/10.1117/12.533840","url":null,"abstract":"The results of a preliminary experiment on laser foam interaction performed at the ABC installation of the Associazione EURATOM-ENEA sulla Fusione are presented. Plastic foams with density of 5 - 20 mg/cm3 were irradiated with light produced from the neodymium laser of ABC (λ = 1.054 μm) and processed through a proper optical system to produce near field ISI smoothed radiation at ≈1013W/cm2 on the target. The use of a smoothed beam was essential to detect in the plasma and in the accelerated dense phase evolving features related to the target foam structure without mixing with those of the irradiating beam. Structures in the plasma corona and in the dense phase were detected by optical shadography of foam slabs. In the same experiment time-dependent transmission of laser light through slabs of foams was measured by target imaging and masking on a photodiode (bandwidth of the system 5 GHz).","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115211549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Wołowski, J. Badziak, F. Boody, S. Gammino, H. Hora, K. Jungwirth, B. Králiková, J. Krása, L. Laska, P. Parys, M. Pfeifer, K. Rohlena, J. Skála, L. Torrisi, J. Ullschmied, E. Woryna
The investigations of nonthermal processes in laser-produced plasmas are not yet complete, especially with regard to the ion acceleration in the plasma generated by high-energy short-wavelengths lasers. This contribution presents the results of studies of fast ion emission from plasma generated using a short wavelength (438 nm), high-energy (up to 250 J in 400 p5 pulse) iodine laser PALS at the Joint Research Laboratory PALS ASCR in Prague, Czech Republic. The properties of highly charged ion streams were investigated by ion diagnostic methods: ion collectors and solid state track detectors as well as a cylindrical electrostatic energy analyzer. Attention was paid to the determination of ion energy and comparison of the energies and abundance of different ion groups. The presented results shown the existence of highly charged ions with z <40 (measured z, =57 forTa) and with energies higher then 20 MeV in a far expansion zone. Ion current densities up to tens of mA/cm2 at a distance of 1 m from the target were obtained. On the basis of the ion diagnostic investigations the existence of nonthermal and nonlinear accelerating processes was demonstrated for the plasma produced by a high-energy short-wavelength laser pulse.
{"title":"Production of fast ions by the 3wo PALS laser beam","authors":"J. Wołowski, J. Badziak, F. Boody, S. Gammino, H. Hora, K. Jungwirth, B. Králiková, J. Krása, L. Laska, P. Parys, M. Pfeifer, K. Rohlena, J. Skála, L. Torrisi, J. Ullschmied, E. Woryna","doi":"10.1117/12.536925","DOIUrl":"https://doi.org/10.1117/12.536925","url":null,"abstract":"The investigations of nonthermal processes in laser-produced plasmas are not yet complete, especially with regard to the ion acceleration in the plasma generated by high-energy short-wavelengths lasers. This contribution presents the results of studies of fast ion emission from plasma generated using a short wavelength (438 nm), high-energy (up to 250 J in 400 p5 pulse) iodine laser PALS at the Joint Research Laboratory PALS ASCR in Prague, Czech Republic. The properties of highly charged ion streams were investigated by ion diagnostic methods: ion collectors and solid state track detectors as well as a cylindrical electrostatic energy analyzer. Attention was paid to the determination of ion energy and comparison of the energies and abundance of different ion groups. The presented results shown the existence of highly charged ions with z <40 (measured z, =57 forTa) and with energies higher then 20 MeV in a far expansion zone. Ion current densities up to tens of mA/cm2 at a distance of 1 m from the target were obtained. On the basis of the ion diagnostic investigations the existence of nonthermal and nonlinear accelerating processes was demonstrated for the plasma produced by a high-energy short-wavelength laser pulse.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124739380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Analysis and particle-in-cell (PIC) simulations of fast particles produced by a short laser pulse with duration of 40 fs and intensity ≥ 1018 W/cm2 interacting with a foil target are performed. Initially, the plasma density distribution of the foil target has a smooth gradient with the scale-length of plasma density varying across it. The absorbed laser energy is transferred to fast electrons, which interact with the foil and are partially ejected from the foil surface. These electrons produce an electric field that causes an ion beam to be emitted from the foil. We analyze the different mechanisms of ion acceleration in the foil plasma and the influence of density gradient and other laser and plasma parameters on ion acceleration. The angular distributions of the ejected electrons and ions are calculated. The optimum laser-plasma parameters needed to achieve the most highly focused ion beam are analyzed.
{"title":"Energetic particle generation and transportation in interaction of ultra-intense laser with foil target","authors":"T. Okada, A. Andreev, S. Toraya, T. Kitada","doi":"10.1117/12.536782","DOIUrl":"https://doi.org/10.1117/12.536782","url":null,"abstract":"Analysis and particle-in-cell (PIC) simulations of fast particles produced by a short laser pulse with duration of 40 fs and intensity ≥ 1018 W/cm2 interacting with a foil target are performed. Initially, the plasma density distribution of the foil target has a smooth gradient with the scale-length of plasma density varying across it. The absorbed laser energy is transferred to fast electrons, which interact with the foil and are partially ejected from the foil surface. These electrons produce an electric field that causes an ion beam to be emitted from the foil. We analyze the different mechanisms of ion acceleration in the foil plasma and the influence of density gradient and other laser and plasma parameters on ion acceleration. The angular distributions of the ejected electrons and ions are calculated. The optimum laser-plasma parameters needed to achieve the most highly focused ion beam are analyzed.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129356229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Bandulet, C. Labaune, J. Fuchs, P. Michel, S. Depierreux
We present some results of a recent experiment performed on LULI's nanosecond laser chain which puts light on the underlying mechanisms involved in plasma-induced incoherence. Following theoretical interpretation for this new-found phenomenon, we set-up a Thomson scattering diagnostic off ion acoustic waves having small k-vectors transverse to the interaction beam. Such waves would be the product of the interplay between non-linear processes undergone by an RPP-smoothed laser beam propagating through an under-dense plasma. We have observed ion acoustic waves with k-vectors ranging from 0.4k0 to 0.6k0 located near the plasma's summit and occurring at the top of the interaction laser pulse. Good correlation between Thomson scattering spectra and other PII signatures, namely the redshift of the transmitted light, when varying interaction conditions strongly supports our first assumptions pertaining to the ion waves' participation in PII.
{"title":"Experimental investigation on the origins of plasma-induced incoherence","authors":"H. Bandulet, C. Labaune, J. Fuchs, P. Michel, S. Depierreux","doi":"10.1117/12.537109","DOIUrl":"https://doi.org/10.1117/12.537109","url":null,"abstract":"We present some results of a recent experiment performed on LULI's nanosecond laser chain which puts light on the underlying mechanisms involved in plasma-induced incoherence. Following theoretical interpretation for this new-found phenomenon, we set-up a Thomson scattering diagnostic off ion acoustic waves having small k-vectors transverse to the interaction beam. Such waves would be the product of the interplay between non-linear processes undergone by an RPP-smoothed laser beam propagating through an under-dense plasma. We have observed ion acoustic waves with k-vectors ranging from 0.4k0 to 0.6k0 located near the plasma's summit and occurring at the top of the interaction laser pulse. Good correlation between Thomson scattering spectra and other PII signatures, namely the redshift of the transmitted light, when varying interaction conditions strongly supports our first assumptions pertaining to the ion waves' participation in PII.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130900664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A consideration of turbulent mixing is especially important in the laser fusion problems where the intensities of shock waves and acceleration fields achieve great values and the arising instabilities lead to a considerable reduction of thermonuclear yield. A standard set of thermodynamic values is insufficient to describe a process of turbulent mixing because a classical set averaging takes no account of the coherent structures, which are essential for the process. However, there is supposed to be a certain "reasonable" number of parameters characterizing a further development of turbulent process, as evidenced by numerical calculations and experimental data. An attempt has been made to determine numerically the turbulent mixing steady-state formation at an example of two-dimensional Rayleigh-Taylor problems. In order to define such hidden characteristics one applied a mathematical apparatus of artificial intellect used effectively in fuzzy logic problems. The process states were coded by wavelet transform allowing one to consider spatially localized structures. The processes under study were determined by numerical calculations. As a result one obtained a steady-state representation of an RT-mixing process. The stable parameters are expressed through linear combinations of wavelet coefficients and Fourier transforms of the physical fields.
{"title":"Analysis of Rayleigh-Taylor instability by nonlinear statistics methods for the tasks of laser thermonuclear fusion","authors":"A. Nuzhny, V. Rozanov, R. Stepanov, A. S. Shumsky","doi":"10.1117/12.536577","DOIUrl":"https://doi.org/10.1117/12.536577","url":null,"abstract":"A consideration of turbulent mixing is especially important in the laser fusion problems where the intensities of shock waves and acceleration fields achieve great values and the arising instabilities lead to a considerable reduction of thermonuclear yield. A standard set of thermodynamic values is insufficient to describe a process of turbulent mixing because a classical set averaging takes no account of the coherent structures, which are essential for the process. However, there is supposed to be a certain \"reasonable\" number of parameters characterizing a further development of turbulent process, as evidenced by numerical calculations and experimental data. An attempt has been made to determine numerically the turbulent mixing steady-state formation at an example of two-dimensional Rayleigh-Taylor problems. In order to define such hidden characteristics one applied a mathematical apparatus of artificial intellect used effectively in fuzzy logic problems. The process states were coded by wavelet transform allowing one to consider spatially localized structures. The processes under study were determined by numerical calculations. As a result one obtained a steady-state representation of an RT-mixing process. The stable parameters are expressed through linear combinations of wavelet coefficients and Fourier transforms of the physical fields.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129857634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present paper summarized recent activity of the target fabrication group at Institute of Laser Engineering (ILE), Osaka University. We focused on (1) organic photovoltaic materials to suppress the damage from laser-shine-through and (2) new emulsion technique to fabricate polyimide capsule. The following topics describes briefly, (3) organic feromagnetic materials for magnetic levitation of the target, (4) ultralow density foams of hydrocarbon whose density is ~2.0 mg/cc with micrometer-sized structures, and (5) new ultrathin (~nm) adhesion technique to provide laser-shock experiment targets.
{"title":"Organic photovoltaic materials and capsule fabrication of relative materials toward IFE targets","authors":"K. Nagai, T. Norimatsu, Y. Izawa, T. Yamanaka","doi":"10.1117/12.537401","DOIUrl":"https://doi.org/10.1117/12.537401","url":null,"abstract":"The present paper summarized recent activity of the target fabrication group at Institute of Laser Engineering (ILE), Osaka University. We focused on (1) organic photovoltaic materials to suppress the damage from laser-shine-through and (2) new emulsion technique to fabricate polyimide capsule. The following topics describes briefly, (3) organic feromagnetic materials for magnetic levitation of the target, (4) ultralow density foams of hydrocarbon whose density is ~2.0 mg/cc with micrometer-sized structures, and (5) new ultrathin (~nm) adhesion technique to provide laser-shock experiment targets.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130039830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Parker, S. Rothman, C. Horsfield, M. Dunne, D. Youngs, S. Batha, N. Lanier, M. Balkey, C. Barnes, Glenn Magelsenn, N. Delameter
A suite of experiments to measure the growth of turbulent mix in a compressible, convergent geometry has been performed on the Omega laser facility at LLE, Rochester NY. These employ a radiographically opaque marker layer to set the initial conditions at the unstable interface and to provide a diagnostic of the induced density gradients. The marker is sandwiched between a plastic ablator and a low-density polystyrene foam cylinder. The implosion is driven by uniform irradiation by 50 laser beams in an impulsive acceleration mode. The ablative drive launches a strong shock, causing the marker to become mixed into both the foam and the ablator. Compressible Richtmeyer Meshkov effects, modified by Bell-Plesset instability dominate the instability growth. The dependence on initial surface roughness is studied along with the time history of the evolution.
{"title":"Investigations into compressible turbulent mix in a convergent geometry plasma environment","authors":"K. Parker, S. Rothman, C. Horsfield, M. Dunne, D. Youngs, S. Batha, N. Lanier, M. Balkey, C. Barnes, Glenn Magelsenn, N. Delameter","doi":"10.1117/12.534289","DOIUrl":"https://doi.org/10.1117/12.534289","url":null,"abstract":"A suite of experiments to measure the growth of turbulent mix in a compressible, convergent geometry has been performed on the Omega laser facility at LLE, Rochester NY. These employ a radiographically opaque marker layer to set the initial conditions at the unstable interface and to provide a diagnostic of the induced density gradients. The marker is sandwiched between a plastic ablator and a low-density polystyrene foam cylinder. The implosion is driven by uniform irradiation by 50 laser beams in an impulsive acceleration mode. The ablative drive launches a strong shock, causing the marker to become mixed into both the foam and the ablator. Compressible Richtmeyer Meshkov effects, modified by Bell-Plesset instability dominate the instability growth. The dependence on initial surface roughness is studied along with the time history of the evolution.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"5228 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129259446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The pressure enhancement due to impedance-matching at the interface between the two-step layered targets has been well studied and established technique for EOS measurement of materials in laser driven shock wave experiments. A detailed numerical simulation study of shock wave propagation through Al standard material in laser driven shock wave experiments was performed using a 1-D radiation hydrodynamic code MULTI. The definitive role of mesh thickness was noticed. The experimental results of shock pressure enhancement in Al-Cu and Al-Au, layered targets corroborated with the numerical simulation results. Simulations were subsequently extended to plane-layered targets such as CH-Al, CH-Cu an CH-Au targets. It is shown that with proper tailoring of laser and target parameters, shock pressures in the range of up to 30 to 50 Mbar could be achieved with relatively moderate intensity lasers (IL = 6 - 8x1013 W/cm2; Pulse FWHM 600 - 800 ps). The numerical simulations also enumerate appropriate conditions to maintain the steadiness of shock waves with minimal preheat effect.
{"title":"Shock pressure enhancement in plane-layered targets through laser-induced shock waves","authors":"V. Senecha, H. C. Pant, B. K. Godwal","doi":"10.1117/12.535938","DOIUrl":"https://doi.org/10.1117/12.535938","url":null,"abstract":"The pressure enhancement due to impedance-matching at the interface between the two-step layered targets has been well studied and established technique for EOS measurement of materials in laser driven shock wave experiments. A detailed numerical simulation study of shock wave propagation through Al standard material in laser driven shock wave experiments was performed using a 1-D radiation hydrodynamic code MULTI. The definitive role of mesh thickness was noticed. The experimental results of shock pressure enhancement in Al-Cu and Al-Au, layered targets corroborated with the numerical simulation results. Simulations were subsequently extended to plane-layered targets such as CH-Al, CH-Cu an CH-Au targets. It is shown that with proper tailoring of laser and target parameters, shock pressures in the range of up to 30 to 50 Mbar could be achieved with relatively moderate intensity lasers (IL = 6 - 8x1013 W/cm2; Pulse FWHM 600 - 800 ps). The numerical simulations also enumerate appropriate conditions to maintain the steadiness of shock waves with minimal preheat effect.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"5228 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129672482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Labaune, H. Baldis, H. Bandulet, S. Depierreux, J. Fuchs, Pierre Michel, D. Pesme
The control of coherence is a critical issue for the high-power lasers used in inertial confinement fusion (ICF). The level of coherence is an important parameter for the control of the light intensity distribution as well as the growth rate of parametric instabilities. Over the past few years, experimental and theoretical studies have evidenced the ability of an underdense plasma to reduce the spatial and temporal coherence of an intense laser beam prooagating through it. As any process affecting laser propagation, plasma-induced incoherence appears fundamental because it can impact on parametric instabilities. We present results obtained with the six-beam LULI laser facility, in the nanosecond regime, showing direct evidences of the reduction of spatial and temporal coherence of an initially RPP-smoothed laser beam after propagation through a preformed plasma. Plasma induced incoherence (PII) proceeds from several mechanisms which include self-focusing, filamentation and non-linear coupling between these mechanisms and forward stimulated Brillouin scattering (FSBS). Part of these experiments was dedicated to the understanding of the physical mechanisms involved in PII, as the break up of a single hot spot and the existence of ion acoustic waves having small wave vectors transverse to the interaction beam which are produced in the PII processes. The spatial and temporal characteristics of these waves give a unique access to the influence of PII on stimulated Brillouin and Raman scattering.
{"title":"Modification of the coherence properties of a laser beam propagating through a plasma and its consequences for stimulated scattering instabilities","authors":"C. Labaune, H. Baldis, H. Bandulet, S. Depierreux, J. Fuchs, Pierre Michel, D. Pesme","doi":"10.1117/12.536887","DOIUrl":"https://doi.org/10.1117/12.536887","url":null,"abstract":"The control of coherence is a critical issue for the high-power lasers used in inertial confinement fusion (ICF). The level of coherence is an important parameter for the control of the light intensity distribution as well as the growth rate of parametric instabilities. Over the past few years, experimental and theoretical studies have evidenced the ability of an underdense plasma to reduce the spatial and temporal coherence of an intense laser beam prooagating through it. As any process affecting laser propagation, plasma-induced incoherence appears fundamental because it can impact on parametric instabilities. We present results obtained with the six-beam LULI laser facility, in the nanosecond regime, showing direct evidences of the reduction of spatial and temporal coherence of an initially RPP-smoothed laser beam after propagation through a preformed plasma. Plasma induced incoherence (PII) proceeds from several mechanisms which include self-focusing, filamentation and non-linear coupling between these mechanisms and forward stimulated Brillouin scattering (FSBS). Part of these experiments was dedicated to the understanding of the physical mechanisms involved in PII, as the break up of a single hot spot and the existence of ion acoustic waves having small wave vectors transverse to the interaction beam which are produced in the PII processes. The spatial and temporal characteristics of these waves give a unique access to the influence of PII on stimulated Brillouin and Raman scattering.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131639841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The non-linear stage of stimulated Raman back-scattering is examined numerically in a collisionless non-relativistic laser plasma. The Euler-Vlasov method is applied in the simplest case of linearly polarized incident electromagnetic wave in 1-D geometry. The method of solution is a Fourier-Hermite expansion of the electron distribution function. The resulting ordinary differential equations are solved for the case corresponding to the interaction of the PALS laser beam with the plasma corona. The time evolution of the electron distribution function is visualized.
{"title":"Euler-Vlasov approach applied to the wave transformation in laser plasma","authors":"M. Mašek, K. Rohlena","doi":"10.1117/12.537088","DOIUrl":"https://doi.org/10.1117/12.537088","url":null,"abstract":"The non-linear stage of stimulated Raman back-scattering is examined numerically in a collisionless non-relativistic laser plasma. The Euler-Vlasov method is applied in the simplest case of linearly polarized incident electromagnetic wave in 1-D geometry. The method of solution is a Fourier-Hermite expansion of the electron distribution function. The resulting ordinary differential equations are solved for the case corresponding to the interaction of the PALS laser beam with the plasma corona. The time evolution of the electron distribution function is visualized.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131893539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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