LPSE: A 3-D wave-based model of cross-beam energy transfer in laser-irradiated plasmas

Myatt, J. F.; Shaw, J. G.; Follett, R. K.; Edgell, D. H.; Froula, D. H.; Palastro, J. P.; Goncharov, V. N.

doi:10.1016/j.jcp.2019.108916

Cited by 22 publications

(6 citation statements)

References 60 publications

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“…The representative code is HARMONY1D/2D developed by Hüller et al [40], which agrees well with the experiments in the study of the SBS [41]. Recently, the fluid codes LPSE [42,43] and FLAME [44] are developed for the simulations of cross beam energy transfer (CBET) and the interplay of SRS and SBS in large scales. Since these two fluid codes have not adopted the paraxial approximation, they are able to capture more nonlinear phenomena of LPI than the fluid codes based on the paraxial approximation.…”

Section: Introductionsupporting

confidence: 59%

Simulations of laser plasma instabilities using a particle-mesh method

H.¹,

Wu²,

Weng³

et al. 2021

Plasma Phys. Control. Fusion

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A physical model is presented for the study of parametric instabilities in inertial confinement fusion (ICF), which considers the coupling of the incident and scattered electromagnetic waves with plasma electrons and ions. Specially, this model is solved numerically with the particle-mesh method, where the plasma is represented by macro-particles both for electrons and ions, and the velocity and position of each macro-particle are numerically updated by using the particle-mesh method. The developed particle-mesh code in one-dimensional geometry (PM1D) is utilized to study the development of parametric instabilities at the nonlinear stages, where electron plasma wave breaking, particle trapping, hot electron generation and density cavity formation can occur. Particle-in-cell (PIC) simulations are carried out to verify this PM1D code. By comparison, it is found that this PM1D code is able to capture the kinetic effects and precisely describe the developments of parametric instabilities at nonlinear stages as the PIC simulations while saving the computation time obviously. Furthermore, a test simulation of the stimulated Raman scattering evolution up to 200 ps verifies the robustness of this PM1D code.

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Section: Introductionsupporting

confidence: 59%

Simulations of laser plasma instabilities using a particle-mesh method

H.¹,

Wu²,

Weng³

et al. 2021

Plasma Phys. Control. Fusion

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“…48 All of this then motivated experiments to accurately validate such models using smaller lasers 49 that can operate in these regimes. CBET in fusion experiments continues to be the subject of theoretical and computational research, [50][51][52][53][54][55][56][57] and a comprehensive model of power flow in the range of conditions in the fusion experiments is presently being developed and validated. 57 In addition, the NIF laser has also been a platform for experiments pursuing other applications, which have both provided the motivation for the further development of these plasma optical components, 58 as well as a platform for experiments to validate that the models could design an optic that increased the energy available in signal NIF beam by 3Â.…”

Section: Overviewmentioning

confidence: 99%

Production of high fluence laser beams using ion wave plasma optics

Kirkwood

Poole

Kalantar

et al. 2022

Applied Physics Letters

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Optical components for laser beams with high peak and averaged powers are being developed worldwide using stimulated plasma scattering that occurs when plasmas interact with intense, coherent light. After decades of pursuit of pulse compressors, mirrors, and other plasma based components that can be created by stimulated scattering from electron density perturbations forming on ultra-short time scales (e.g., via Stimulated Raman Scattering), more recent work has produced optical components on longer time scales allowing ion motion as well [via Stimulated Brillouin Scattering (SBS)]. In the most recent work, ion wave plasma optics have had success in producing pulses of focusable coherent light with high energy and fluence by operating on ns time scales and now promise to enable numerous applications. Experiments have further shown that in some parameter regimes, even simple plasma response models can describe the output of such optics with sufficient accuracy that they can be used as engineering tools to design plasma optics for future applications, as is already being done to control power deposition in fusion targets. In addition, the development of more sophisticated models promises to enable still higher performance from SBS driven plasma optical components under a wider range of conditions. The present status and most promising directions for future development of ion wave plasma optic techniques are discussed here.

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“…Losses due to Stimulated-Brillouin Scattering (SBS) are not modelled by such simple approaches. Since in our experiment the SBS reflected power was not directly measured, the experimental shape of the pulse was corrected by the amount of SBS evaluated by performing simulations with the time-enveloped wave solver LPSE [24]. This code couples the equations that describe the pump wave with the equations for the Raman and Brillouin scattered light and plasma waves.…”

Section: Hydrodynamic Simulationsmentioning

confidence: 99%

Experimental characterization of hot-electron emission and shock dynamics in the context of the shock ignition approach to inertial confinement fusion

et al. 2021

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We report on planar target experiments conducted on the OMEGA-EP laser facility performed in the context of the Shock Ignition (SI) approach to inertial confinement fusion. The experiment aimed at characterizing the propagation of strong shock in matter and the generation of hot-electrons (HE), with laser parameters relevant to SI (1-ns UV laser beams with I ∼10 16 W/cm 2 ). Time-resolved radiographies of targets were performed in order to study the hydrodynamic evolution. The hot-electron source was characterized in terms of maxwellian temperature T h and laser to hot-electron energy conversion efficiency η using data from different x-rays spectrometers. The post-processing of these data gives a range of possible values for T h and η (i.e. T h [keV] ∈ [20,50] and η ∈ [2%,13%]). These values are used as input in hydrodynamic simulations to reproduce the results obtained in radiographies, thus constraining the range for the HE measurements. According to this procedure, we found that the laser converts ∼10% ±4% of energy into hot-electrons with T h = 27 keV ±7 keV. Such electrons have enough low temperature that they should not be a prehaeat concern in SI.

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LPSE: A 3-D wave-based model of cross-beam energy transfer in laser-irradiated plasmas

Cited by 22 publications

References 60 publications

Simulations of laser plasma instabilities using a particle-mesh method

Simulations of laser plasma instabilities using a particle-mesh method

Production of high fluence laser beams using ion wave plasma optics

Experimental characterization of hot-electron emission and shock dynamics in the context of the shock ignition approach to inertial confinement fusion

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