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Executive Summary
Pages 1-2

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From page 1...
... The present study did not address whether a megawatt-class free-electron laser will be an effective weapon in a naval context, nor did it address operational lethality factors, such as duration of the beam pulse on target or the repetition rate. More specifically, the study did not address the effectiveness of the device to perform Navy missions of interest or the physics associated with atmospheric propagation of the laser beam (thermal blooming, aerosols, weather effects, etc.)
From page 2...
... 4. Despite the significant technical progress made in the development of high-average-power free-electron lasers, difficult technical challenges remain to be addressed in order to advance from present capability to megawatt-class power levels.


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