The BRL 1 metre long, 12.7 mm square bore rail gun, powered by a 20 kJ inductive source, which utilizes arc drive to accelerate a 2.5 gram projectile, was used as a test bed for the study of dynamic properties of driven arcs. The measured signatures of four B-dot loops, time of arc arrival at four light pipe-PIN diode detectors and the instantaneous total current are used in an analysis of the size of the arc armature. A current density distribution in an arc armature was found whose calculated effect on inductive B-dot loops matches that of our actual measurements. A computer performed a Biot-Savart law integration over the arc volume of an arbitrary, parametrically defined, one dimensional current distribution and then calculated the time derivative of the resulting field to predict the induced voltage at each of the field measuring loops.
Measurements of the spatial distributions of current in a rail gun arc armature
Messung der raeumlichen Stromverteilungen in einer Schienenkanonen-Lichtbogenarmatur
IEEE Transactions on Magnetics ; 20 , 2 ; 403-406
1984
4 Seiten, 8 Bilder, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
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