The effect of electrode material on the motion of a plasma piston in rail accelerators

Autor:	S. A. Ponyaev, B. I. Reznikov, B. G. Zhukov, Sergey Bobashev, R. O. Kurakin
Rok vydání:	2015
Předmět:	Materials science Physics and Astronomy (miscellaneous) Flow (psychology) chemistry.chemical_element Plasma Mechanics Copper law.invention Acceleration Piston chemistry law Plasma pencil Graphite Current (fluid)
Zdroj:	Technical Physics Letters. 41:964-967
ISSN:	1090-6533 1063-7850
Popis:	The acceleration of a plasma piston in the channels of rail accelerators with copper and graphite electrodes is studied experimentally. It is found that the plasma velocity is reduced by 15–20% (at equal discharge currents) when graphite electrodes are used instead of copper ones. This may be attributed to an increase in the erosion graphite mass that is drawn into motion by the plasma piston. It is concluded based on the interpretation of the obtained data that the current flow in the channels of rail accelerators is governed at high plasma speeds by the processes of thermoautoelectron emission.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::39a205933258f05a20142ce7e53013aa https://doi.org/10.1134/s1063785015100041 Zobrazit plný text záznamu Plný text ve formátu PDF