High velocity electromagnetic mass launcher having an ablation r

Details High velocity electromagnetic mass launcher having an ablation r High velocity electromagnetic mass launcher having an ablation r

1998-04-03

1998-12-01

Tudor, Harold J.

Ordnance

Accelerating

124 3, F41B 600

Patent

active

058441611

ABSTRACT:
A railgun having a composite insulator of laminated materials positioned between the rails. The composite insulator is comprised of a series of conducting layers oriented with the edges toward the bore, or barrel, of the railgun and their wide edges away from the bore. The laminate is layed lengthwise along the rails and is comprised of conducting layers of a high heat conductivity metal interleaved with an insulator material. The insulator material allows the composite insulator to stand off the voltages in a plasma armature even under high radiation flux conditions. Below the conducting material's ablation threshold the amount of ablation produced by the composite insulator is reduced by the reduction of insulator surface area exposed to the radiation. This allows better control of armature growth, mass acceleration by the plasma armature, secondary formation, and other factors normally found to retard projectile acceleration.

REFERENCES:
patent: 5375504 (1994-12-01), Bauer
Thio et al., On Some Techniques to Aceive Ablation Free Operation of Elecmagnetic Rail Launchers, Conf. Proc. 6th Symp. on Electromag. Launch Tech., Austion, TX, Apr. 28-30, 1992.
Meger et al., NRL Experimental and Theoretical Research on the Acceleration Of Plasma Armatures in Railguns, AIAA 93-3158, AIAA 24th Plasmadynamics & Lasers Conf., Jul. 6-9, 1993.

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