Comparing magnetic pushing to underwater explosions for flyer acceleration

Author:

Maler D.1ORCID,Liziakin G.1ORCID,Belozerov O.1ORCID,Efimov S.1ORCID,Rakhmilevich D.1,Cohen K.1ORCID,Krasik Ya. E.1ORCID

Affiliation:

1. Department of Physics, Technion—Israel Institute of Technology , Haifa 3200003, Israel

Abstract

We present results exploring various methods of aluminum flyer acceleration. One method uses the shock wave generated by underwater electrical explosions of thin foils supplied by a pulse generator with stored energy of ∼4.7 kJ. Utilizing the shock created by an exploding foil, a maximal free flyer velocity of ∼2000 m/s is obtained. This acceleration method is compared to results exploiting only magnetic pushing to accelerate flyers using a common strip-line configuration, resulting in much lower velocities of ∼300 m/s. We also present a modified strip-line configuration, for which a significant increase in the flyer velocity to ∼1200 m/s is measured. Finally, a hybrid strip configuration, incorporating both the effects of magnetic pushing and acceleration by exploding foil and its subsequent shock wave, results in ∼1400 m/s flyer velocity. These experimental results are analyzed by numerical simulations and analytical modeling of the conservation equations of mass and momentum.

Funder

Israel Science Foundation

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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