Design and Analysis of Megawatt Class Free Electron Laser Weapons‬

Joseph Weisheng Ng, Singapore

Abstract:‬ Free Electron Lasers (FELs) are desirable for defense against a spectrum of threats especially in the maritime domain due to their all-electric nature, their wavelength tunability to atmospheric propagation ‘sweet-spots’ and their scalability to megawatt class lasers. In this thesis, we exploit these characteristics to design, simulate and analyze both amplifier and oscillator FELs using the FEL 4-D code developed by the Physics Directed Energy (DE) group at the Naval Postgraduate School (NPS). Propagation analysis is performed on the designs using ANCHOR, also developed by the NPS Physics DE group, to arrive at various lethality estimates that allow us to quantify the weapon’s effectiveness in its operating domain. We conclude that megawatt class FELs, while lacking in technological maturity, would provide an effective defense especially against hardened, time critical threats such as sub-sonic and super-sonic anti-ship missiles. ‬‬‬