Electrical properties of plasmas formed in explosive magnetic flux compression generator environments

Summary form only given. Explosively driven shock tubes are used to study shock induced gas conductivity in explosive magnetic flux compression generators (FCGs). The shock tubes use 50 grams of composition C-4 explosive to propel aluminum flyer plates towards dense stainless steel plugs to simulate...

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Bibliographic Details
Main Authors: Dorsey, D.J., Freeman, B.L.
Format: Conference Proceeding
Language:English
Subjects:
Argon
Conductivity
Electric shock
Electrical resistance measurement
Explosives
Magnetic flux
Magnetic properties
Plasma density
Plasma measurements
Plasma properties
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Summary:Summary form only given. Explosively driven shock tubes are used to study shock induced gas conductivity in explosive magnetic flux compression generators (FCGs). The shock tubes use 50 grams of composition C-4 explosive to propel aluminum flyer plates towards dense stainless steel plugs to simulate gas compression as the armature approaches the stator in an FCG. The 2.5 cm ID acrylic shock tubes are designed using the Gurney method to drive the flyer plates at velocities similar to FCG armatures (3-4 km/s). Experiments have been performed with argon, helium, synthetic air, and sulfur hexafluoride. Current and voltage measurements have been used to determine plasma bulk resistance as a function of time. Minimum resistances of 2.7 Ohms in argon and 6.5 Ohms in SF/sub 6/ were measured. These measurements were used to calculate minimum plasma resistivities of 0.031 Ohm/spl middot/cm for argon and 0.073 Ohm/spl middot/cm for SF/sub 6/. Calculations are based on experimental geometry and the assumption of a finite plasma disk between current and voltage probes.
ISSN:0730-9244
2576-7208
DOI:10.1109/PLASMA.2000.854721