Scaling Laws for Collisionless Laser–Plasma Interactions of Relevance to Laboratory Astrophysics

Ryutov, D. D.; Remington, B. A.

doi:10.1007/s10509-006-9247-0

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Laboratory experiments are a powerful tool to explore these questions in a scaled-down setting under controlled conditions. 15,16 Since many collisionless shocks are a) Paper KI3 3, Bull. Am.…”

Section: Introductionmentioning

confidence: 99%

Visualizing electromagnetic fields in laser-produced counter-streaming plasma experiments for collisionless shock laboratory astrophysics

et al. 2013

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Collisionless shocks are often observed in fast-moving astrophysical plasmas, formed by non-classical viscosity that is believed to originate from collective electromagnetic fields driven by kinetic plasma instabilities. However, the development of small-scale plasma processes into large-scale structures, such as a collisionless shock, is not well understood. It is also unknown to what extent collisionless shocks contain macroscopic fields with a long coherence length. For these reasons, it is valuable to explore collisionless shock formation, including the growth and self-organization of fields, in laboratory plasmas. The experimental results presented here show at a glance with proton imaging how macroscopic fields can emerge from a system of supersonic counter-streaming plasmas produced at the OMEGA EP laser. Interpretation of these results, plans for additional measurements, and the difficulty of achieving truly collisionless conditions are discussed. Future experiments at the National Ignition Facility are expected to create fully formed collisionless shocks in plasmas with no pre-imposed magnetic field. V C 2013 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

Visualizing electromagnetic fields in laser-produced counter-streaming plasma experiments for collisionless shock laboratory astrophysics

et al. 2013

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“…Our paper describes general scaling laws that allow one to relate experiments with different plasma parameters, different spatial and temporal scales and different ion species. The usefulness of the scaling approach to high-energy-density laboratory physics (HEDLP) has been earlier demonstrated in the area of HEDLP hydrodynamics [11], radiative hydrodynamics [12] and magnetohydrodynamics [13], as well as in the area of ultra-intense laser interactions with a plasma [14,15]. The scaling approach does not generally allow one to predict the absolute values of the characteristic times and spatial scales.…”

Section: Introductionmentioning

confidence: 99%

Basic scalings for collisionless-shock experiments in a plasma without pre-imposed magnetic field

Ryutov

Kugland

Park

et al. 2012

Plasma Phys. Control. Fusion

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In this paper, scaling relations pertinent to collisionless-shock experiments are derived. Two oppositely directed, non-relativistic interpenetrating plasma streams are considered. A full set of collisionless Vlasov-Maxwell equations is used to describe the plasma streams. Two scaling parameters are identified for those streams in which the initial temperature is small compared with the final temperature. If the scaling parameters are held constant between the two systems, the knowledge of the behavior of one of the systems allows for a direct prediction of behavior of the other, irrespective of differences in, for example, the plasma density. This similarity covers both hydrogen and non-hydrogen ion species. Reduced versions suitable for assessing electrostatically mediated and magnetically mediated (Weibel-like) models of the shocks are described. In these limiting cases, the number of scaling parameters reduces to one, making the similarity quite broad. The presence of these scaling relations can serve as a basis for making comparisons between models and selecting the most plausible models. A brief discussion is presented of the constraints associated with the role of intra-jet collisions, whose frequency may be non-negligible even if the collisions between the particles of two jets are very rare.

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“…The application of such similarity criteria is useful for direct comparisons of laboratory data and both observations and multi-dimensional numerical simulations. Investigations of similarity criteria for comparisons of the results of laboratory experiments and astrophysical processes have been carried out in many studies (see, e.g., [17][18][19][20]). In spite of the very different physical parameters of laboratory and astrophysical jets, there exist scaling criteria that can be used to relate one to another .Following [21], we will consider the following system of one-dimensional equations for the non-stationary hydrodynamics of a compressible fluid [22]: where t, v, M, V , ρ, P, γ, and Λ(ρ, T) are the time, velocity, mass, volume, density, pressure, adiabatic index, and cooling function, respectively.…”

Section: Analysis Of Similarity Criteriamentioning

confidence: 99%

Numerical Simulations of Magnetized Astrophysical Jets and Comparison with Laboratory Laser Experiments

et al. 2018

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Scaling Laws for Collisionless Laser–Plasma Interactions of Relevance to Laboratory Astrophysics

Cited by 8 publications

References 21 publications

Visualizing electromagnetic fields in laser-produced counter-streaming plasma experiments for collisionless shock laboratory astrophysics

Visualizing electromagnetic fields in laser-produced counter-streaming plasma experiments for collisionless shock laboratory astrophysics

Basic scalings for collisionless-shock experiments in a plasma without pre-imposed magnetic field

Numerical Simulations of Magnetized Astrophysical Jets and Comparison with Laboratory Laser Experiments

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