What question did this study set out to answer?

To develop a simplified heuristic model of the early nonlinear Rayleigh–Taylor instability in thin-cylindrical-shell Z pinches and estimate pinch thermalization time.

June 1, 1995Physics of Plasmas

A heuristic model for the nonlinear Rayleigh–Taylor instability in fast Z pinches

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To develop a simplified heuristic model of the early nonlinear Rayleigh–Taylor instability in thin-cylindrical-shell Z pinches and estimate pinch thermalization time.
Modeled nonlinear mass transfer from low-areal-mass bubble regions into high-areal-mass spike regions driven by magnetic force components along the perturbed field–plasma boundary.
Calculated the on-axis arrival times of the accelerated bubble mass relative to the unperturbed shell mass to quantify pinch thermalization duration.
Calibrated initial single-mode perturbation wavelengths and amplitudes against experimental data from foil and gas puff implosions.
Mass displacement preferentially thins the bubble region, causing it to accelerate ahead of spikes and reach the axis early to initiate radiation.
Pinch radiation persists through the later arrival of mass entrained within spikes and unperturbed shell segments.
Thermalization time is shown to be a weak function of initial perturbation amplitude and wavelength, permitting extrapolative modeling across qualitatively similar implosions.

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Implication

Theoretical modeling reveals bubble mass redistribution and thermalization timing in fast Z pinches, indicating initial perturbation parameters extrapolate across similar implosions.

Cite This Study

Hussey et al. (1995) studied this question.

synapsesocial.com/papers/6a879c3ac70d2262fca29e4b https://doi.org/10.1063/1.871292

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Implication

Theoretical modeling reveals bubble mass redistribution and thermalization timing in fast Z pinches, indicating initial perturbation parameters extrapolate across similar implosions.

A heuristic model for the nonlinear Rayleigh–Taylor instability in fast Z pinches

Key Points

Discussion

Implication

Cite This Study

A heuristic model for the nonlinear Rayleigh–Taylor instability in fast Z pinches

Key Points

Discussion

Implication

Cite This Study

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