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Proceedings Paper

New defence system using a chemical oxygen-iodine laser in a high-altitude airship
Author(s): K. Takehisa
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Paper Abstract

New designs of a defense system using a chemical oxygen iodine laser (COIL) are presented to realize a boost-phase interception of a ballistic missile. Although a space-based laser (SBL), in which the Hydrogen-Fluoride chemical laser is the primary candidate, can realize such a defense system, many SBLs are necessary to cover even a single missile site because they need to continuously go around the earth. This is an expensive system if the potential enemy is a small country. Meanwhile a high energy laser (HEL) carried by a high-altitude airship (HAA) can realize a geostationary defense system if the HEL is quite lightweight. A chemical oxygen-iodine laser (COIL) is suitable since it does not require a heavy electric power supply. But since the COIL should be as light as possible, it would be more advantageous if it can operate without a vacuum pump that requires a large electric-power supply and cooling water. Rate-equation based simulations have been performed to see if it can operate without a vacuum pump by filling a buffer gas at the pressure higher than the outside. The simulation results indicate that it can operate continuously at an altitude of 20 km where the atmospheric pressure becomes ~5,400 Pa (~40 Torr). Moreover, since atmospheric turbulence is greatly reduced at that altitude, adaptive optics is also not necessary for focusing the beam after a long propagation. A simple focusing mirror can focus the beam tightly enough to destroy the target of >100 km away.

Paper Details

Date Published: 9 October 2018
PDF: 13 pages
Proc. SPIE 10798, High-Power Lasers: Technology and Systems, Platforms, and Effects II, 1079803 (9 October 2018); doi: 10.1117/12.2318141
Show Author Affiliations
K. Takehisa, O2 Laser Lab. (Japan)

Published in SPIE Proceedings Vol. 10798:
High-Power Lasers: Technology and Systems, Platforms, and Effects II
Harro Ackermann; Willy L. Bohn; David H. Titterton, Editor(s)

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