Laser plasma focal spot (LPFS) interaction and plasma generation at high earth altitude regions: concept design and computational analysis

Laser beam clusters installed at ground bases can direct their laser beams upward into focal spots at high altitudes in the earth atmospheric regions tens of kilometers of height. At intense scanning intersecting focal points of these laser beams, selected areas can be ionized to generate physical plasma layers. Electron densities of such synthetic plasma layers can be the order of 10⁶ to 10¹⁰ cm^-3. At such range of electron densities, microwave signals and bursts of energies could be launched from distances below these layers and are to be reflected back to earth for a variety of applications. Pre – operating measures such as space – earth weather conditions monitoring and surrounding eco system maitenance steps in the regions of interest are highlighted. The concept presented in this paper is supported by computational analysis, design of experiment optimization and a discussion of issues such as diffusion & transport in plasma as well as associated effects of ionization along the path of the laser beams and within the produced plasma layers.