In the photoelectric effect, electrons are emitted from matter (metals and non-metallic solids, liquids or gases) as a consequence of their absorption of energy from electromagnetic radiation of very short wavelength, such as visible or ultravioletlight. Electrons emitted in this manner may be referred to as photoelectrons.[1][2] First observed by Heinrich Hertz in 1887,[2] the phenomenon is also known as the Hertz effect,[3][4] although the latter term has fallen out of general use. Hertz observed and then showed that electrodes illuminated with ultraviolet light create electric sparks more easily.
The photoelectric effect requires photons with energies from a few electronvolts to over 1 MeV in high atomic number elements. Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave-particle duality.[1] Other phenomena where light affects the movement of electric charges include the photoconductive effect (also known as photoconductivity or photoresistivity), the photovoltaic effect, and the photoelectrochemical effect.
The photoelectric effect (when electrons are ejected from a material) usually happens with metals using UV light. Lower (visible or IR) frequencies don't have enough energy to do this. I don't see why one would bother amplifying cosmic radiation. The UV from space is heavily absorbed by the atmosphere.