NDLI: Reliable, highly reproducible plasma injectors for electrothermal and electrothermal-chemical launchers

Content Provider	IEEE Xplore Digital Library
Author	Shafir, N. Zoler, D. Wald, S. Shapira, M.
Copyright Year	1965
Abstract	The plasma injector is a major component within electrothermal (ET) or electrothermal-chemical (ETC) launcher. Soreq NRC has promoted for years the solid-propellant ETC (SPETC) gun concept, where the generated plasma jet serves to ignite the charge and to control its burning rate (for example, to eliminate the effect of the initial charge temperature on the propellant burning rate). From a system engineering point of view, there is an advantage in using small size plasma injectors. Such injectors have been designed, built, and tested in our laboratory in the past few years. We report about "free jet" (the plasma is injected to the atmosphere and not into propellant charge) experiments performed with certain models of such injectors. These injectors were designed for electrical energies in the range of hundreds of kilojoules and several hundred megawatts. The dependence of the mass losses from the ablative capillary and anode on the total electrical energy and power are presented. Although the limited scope of this presentation one can grasp from these data indications regarding the differences between the thermodynamic properties (temperature, density) of plasma jets produced by capillaries with different geometries, operated at various electrical energies and powers. A comparison between the energy carried by the plasma and metal droplets (resulting from anode melting) may give an indication about the relative contribution of these two factors to the propellant ignition.
Sponsorship	IEEE Magnetics Society
Starting Page	355
Ending Page	359
Page Count	5
File Size	357117
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrothermal launching Plasma temperature Propulsion Plasma properties Anodes Plasma density Temperature control Systems engineering and theory Testing Laboratories plasma injector Ablation capillary
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Temperature Compensation and Improved Ballistic Performance in a Solid-Propellant Electrothermal-Chemical (SPETC) 40-mm Gun

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Reliable, highly reproducible plasma injectors for electrothermal and electrothermal-chemical launchers

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