Prevention of breakdown behind railgun projectiles

Details Prevention of breakdown behind railgun projectiles Prevention of breakdown behind railgun projectiles

1991-10-28

1992-10-13

Bentley, Stephen C.

Ordnance

Accelerating

124 3, F42B 600

Patent

active

051552906

ABSTRACT:
An electromagnetic railgun accelerator system, for accelerating projectiles (14, 15, 114, 214, 314, 414) by a plasma arc (3), introduces a breakdown inhibiting gas into the railgun chamber (26) behind the accelerating projectile (14). The breakdown inhibiting gas, which absorbs electrons, is a halide or a halide compound such as fluorine or SF.sub.6. The gas is introduced between the railgun rails (12) after the projectile (14) has passed through inlets (16) in the rails (12) or the projectile (114); by coating the rails (12) or the projectile (15) with a material (28) which releases the gas after the projectile (14) passes over it; by fabricating the rails (12) or the projectile (15) or insulators out of a material which releases the gas into the portions of the chamber (26) through which the projectile has travelled. The projectile (214, 314, 414) may have a cavity (232, 332, 432) at its rear to control the release of ablation products (4).

REFERENCES:
patent: 4433607 (1984-02-01), Kemeny
patent: 4621561 (1986-11-01), Weldon
Hawke R. S., "Railgun Development for EOS Applications; A Status Report", UCRL-96479, Jun. 30, 1987.
Webster's New World Dictionary, College Edition, "Transpiration", p. 1548, 1957.
Thio, Y. C., Feasibility Study of a Railgun as a Driver for Impact Fusion, DOE/ER/13048-3, Jun. 1986, pp. 6-1-6-5.

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