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Physics of Plasmas : Characterization of converging shock waves generated by underwater electrical wire array explosion

By S. Efimov, A. Fedotov, S. Gleizer, V. Tz. Gurovich, G. Bazalitski et al

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Book Id: WPLBN0002169649
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 20 November 2008

Title: Physics of Plasmas : Characterization of converging shock waves generated by underwater electrical wire array explosion  
Author: S. Efimov, A. Fedotov, S. Gleizer, V. Tz. Gurovich, G. Bazalitski et al
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Plasmas Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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A. Fedotov, S. Gleizer, V. Tz. Gurovich, G. Bazalitski Et A, S. E. (n.d.). Physics of Plasmas : Characterization of converging shock waves generated by underwater electrical wire array explosion. Retrieved from http://hawaiilibrary.net/


Description
Description: Results of ∼ 200 kbar pressure generation at 50 μm distance from the implosion axis of the converging shock wave produced by an underwater electrical explosion of a cylindrical wire array are reported. The array was exploded using a submicrosecond high-current generator (stored energy of ∼ 4.2 kJ, current amplitude of ∼ 325 kA, rise time of ∼ 1 μs). Multiframe shadow imaging of the shock wave was used to determine its time of flight. These data were applied for calculating the pressure at the vicinity of the implosion axis using one dimensional hydrodynamic calculations and the Whitham approach. However, it was found that in the case of wire array radius ≤ 5 mm, multiframe imaging cannot be used at the final stage of the shock wave implosion because of possible changes in the optical properties of the water. Optical and spectroscopic methods based on either the change in the refraction index of the optical fiber or spectroscopy of the plasma formed inside the capillary placed at the implosion axes were used for shock wave characterization. A satisfactory agreement was found between the results obtained by these methods.

 

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