Theory of wire number scaling in wire-array Z pinches

Autor:	M. P. Desjarlais, B. M. Marder
Rok vydání:	1999
Předmět:	Physics Debye sheath Condensed matter physics Radius Amplification factor Condensed Matter Physics Instability Computational physics symbols.namesake Physics::Plasma Physics Z-pinch symbols Pinch Rayleigh–Taylor instability Scaling
Zdroj:	Physics of Plasmas. 6:2057-2064
ISSN:	1089-7674 1070-664X
DOI:	10.1063/1.873460
Popis:	Pulsed-power-driven Z pinches, produced by imploding cylindrical arrays of many wires, have generated very high x-ray radiation powers (>200 TW) and energies (2 MJ). Experiments have revealed a steady improvement in Z-pinch performance with increasing wire number at fixed total mass and array radius. The dominant mechanism acting to limit the performance of these devices is believed to be the Rayleigh-Taylor instability which broadens the radially imploding plasma sheath and consequently reduces the peak radiation power. A model is presented which describes an amplification over the two-dimensional Rayleigh-Taylor growth rate brought about by kink-like forces on the individual wires. This amplification factor goes to zero as the number of wires approaches infinity. This model gives results which are in good agreement with the experimental data and provides a scaling for wire-array Z pinches.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::376fc1fd8743efa814141475a8b4b3b6 https://doi.org/10.1063/1.873460 Zobrazit plný text záznamu