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Showing 1 to 7 of 7 for “"Weibel instability"”.
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Continuum Kinetic Simulations of Plasma Sheaths and Instabilities
… growth and nonlinear saturation of the kinetic Weibel instability, including its role in plasma sheaths. The continuum kinetic algorithm has been shown to compare well with theoretical predictions of Landau damping of Langmuir waves and the two-stream instability. Benchmarks are also performed …
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Experimental Studies of Magnetic Field Generation and Saturation Mechanisms in Laser-Driven Plasmas
… phenomena, the Biermann battery and the electron Weibel instability, are studied in the context of laser-driven planar geometries. First, an experiment on the dynamics and scaling of the saturation of spontaneously generated magnetic fields in laser-produced, high-thermal-𝛽 HED plasmas is …
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Transport Properties and Radiation Production in Plasmas with Sub-Larmor-Scale Magnetic Turbulence
Kinetic streaming instabilities, such as the Weibel instability, occur in various HED plasma setups. Such instabilities generate strong (sub-equipartition) magnetic fields which reside at small, sub-Larmor scales. Efficient electron acceleration to relativistic energies is not uncommon in such …
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Self-generated magnetic fields in intense laser-solid interactions relevant to relativistic plasma astrophysics
… density, produced by the Biermann battery and Weibel instability mechanisms. The first part of the thesis explores the transport of relativistic electrons in relatively thick solids, specifically, different allotropes of lithium, silicon and carbon. This is initially explored numerically. …
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Emitting Wall Boundary Conditions in Continuum Kinetic Simulations: Unlocking the Effects of Energy-Dependent Material Emission on the Plasma Sheath
… is discussed, alongside a brief study of the Weibel instability in the sheath demonstrating the necessity of proper collision implementation to avoid missing relevant physics. A novel implementation of semi-empirical models for electron-impact secondary electron emission into the boundary …
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Genesis, dynamics, and dissipation of turbulent magnetic fields
… generation of seed magnetic fields through the Weibel instability under a generic large-scale shear flow. The resulting spontaneous plasma magnetization confirms kinetic plasma processes as a plausible cause of magnetogenesis and that cosmic plasmas are thereby ubiquitously magnetized. This work …
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Interaction of charged particle beams with plasmas
… during the nonlinear stage of the resistive Weibel instability (WI) is presented and is used to calculate the stopping time of the beam. The model and supporting simulation results lead to the conclusion that the WI initially enhances beam deceleration but then reduces it when compared to a …