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- W332875667 abstract "A theoretical framework for modeling the characteristics of railgun plasma armatures is developed taking into account nonideal transport properties and equation of state. The electrical resistivity of the plasma is calculated as a sum of contributions from electronion and electron-neutral collisions. Nonideal correction to the ionization potential and pressure in Saha's equation and the equation of state is included. A steady-state magnetogasdynamic model improved over earlier works is developed. In this model, the net Lorentz force exerted on the plasma armature is exactly accounted for. The model studies the radiation emanating from the plasma armature. It is found, on the one hand, that the radiation from the plasma armature under the conditions of most railgun experiments conducted in the past is sufficiently high to cause ablation. On the other hand, the modeling results also indicate that there indeed exist domains of operating parameters in which radiative ablation of the wall materials can be completely eliminated. Whether these favorable domains of operating parameters can be realized in practice remains a development of the future, though preliminary experiments conducted in a companion program sponsored by DoE and experiments in other institutions based upon the theoretical recommendations developed here have produced significant reductionmore » of ablation of the rails. It should be emphasized, however, that ablation mechanisms other than radiation could also be present.« less" @default.
- W332875667 created "2016-06-24" @default.
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- W332875667 date "1986-05-30" @default.
- W332875667 modified "2023-09-27" @default.
- W332875667 title "Models and radiation of railgun plasma armatures with nonideal plasma properties. Final report, 1 October 1983-30 September 1985" @default.
- W332875667 hasPublicationYear "1986" @default.
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