Blast wave radiation source measurement experiments on the Z Z-pinch facility

Peterson, R. R.; Peterson, D. L.; Watt, R. G.; Idzorek, G.; Tierney, T.; Lopez, M.

doi:doi:10.1063/1.2186050

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Three-dimensional continuous modeling of beam-electron cloud interaction: Comparison with analytic models and predictions for the present and future circular machines

Long-term beam-electron cloud interaction is modeled with a three-dimensional parallel continuous model originally developed for plasma wakefield acceleration modeling. The simulation results are compared with the two-macroparticle model for strong head-tail instability. The two-macroparticle model captures some of the instability features of the beam; however, this model is too simple to accurately describe the complex nature of the beam-cloud interaction. The effects of dipole magnets on the ...

New opportunities for plasma science in nonequilibrium, low-temperature plasmas confined to microcavities: There’s plenty of room at the bottom

Nonequilibrium, low-temperature plasmas have, in just the past few years, been confined to microcavities with characteristic dimensions (d) as small as 10 μm. Plasma science has thus entered a new realm of parameter space in which d is on the order of tens of debye lengths and the plasma frequency ωp/2π is approaching 1 THz. In this previously unexplored region, plasmas display intriguing characteristics, including the loss of quasineutrality and the ability to operate continuously at atmospher...

The Dynamic Hohlraum (DH) radiation on the Z facility at Sandia National Laboratories [ R. B. Spielman, W. A. Stygar, J. F. Seamen et al., Proceeding of the 11th International Pulsed Power Conference, Baltimore, 1997, edited by G. Cooperstein and I. Vitkovitsky (IEEE, Piscataway, NJ, 1997), Vol. 1, p. 709 ] is a bright source of radiant energy that has proven useful for high energy density physics experiments. But the radiation output from a DH on Z needs to be well known. In this paper, a new method is presented for measuring the radiation fluence deposited in an experiment, specifically, an experiment driven by a Z DH. This technique uses a blast wave produced in a SiO₂ foam, which starts as supersonic but transitions to subsonic, producing a shock at the transition point that is observable via radiography. The position of this shock is a sensitive measure of the radiation drive energy from the Z DH. Computer simulations have been used to design and analyze a Z foam blast wave experiment.

Article Outline

INTRODUCTION
BLAST WAVES
1. Examples of blast waves
2. Blast wave physics
EXPERIMENTS ON Z
RESULTS
CONCLUSIONS

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KEYWORDS and PACS

Keywords

plasma shock waves, plasma diagnostics, Z pinch

PACS

52.25.Os

Emission, absorption, and scattering of electromagnetic radiation
52.35.Tc

Shock waves and discontinuities
52.70.La

X-ray and γ-ray measurements
52.58.Lq

Z-pinches, plasma focus, and other pinch devices

ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1063/1.2186050

PUBLICATION DATA

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1070-664X (print)

1089-7674 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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