Ordnance – Accelerating
Patent
1990-01-16
1991-04-09
Bentley, Stephen C.
Ordnance
Accelerating
124 3, F41B 600
Patent
active
050054627
ABSTRACT:
An electromagnetic launcher or railgun includes a projectile or armature which is comprised of an optically activated semiconductor switch device including a body of bulk semiconductor material, such as gallium arsenide (GaAs) or gallium arsenide doped with chromium (Cr: GaAs), located between a pair of rails across which is connected a relatively high current source. A source of optical energy, such as a pulsed laser, directs optical energy to at least one surface of the semiconductor switch device where the conductivity of the semiconductor body is thereby increased and current from the source is transferred between the rails through the semiconductor body, causing an electromagnetic Lorentz type drive force to be built up behind the armature, which is set into motion and rapidly accelerated along the rails.
REFERENCES:
patent: 4343223 (1982-08-01), Hawke et al.
patent: 4431914 (1984-02-01), Mourou et al.
patent: 4546249 (1985-10-01), Whitehouse et al.
Optically Activated Switch Technology, by Maurice Weiner, Dr., Lawrence J. ovino, Mr., Terence Burke, Mr., Robert J. Youmans, and Mr., Melvin J. Wade--Presented at Army Science Conference Jun. 17-19, 1986, West Point, New York.
Bovino Lawrence J.
Jasper, Jr. Louis J.
Weiner Maurice
Bentley Stephen C.
The United States of America as represented by the Secretary of
Zelenka Michael
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