Experimental Evidence of an X-Ray Laser
A three-stage neodymium:glass laser has been used to produce collimated x-radiation from a copper containing target. The 1.06 µm Q-switched pulse from the neodymium laser was focused by a cylindrical lens to a horizontal line traversing the thin target. The emission from the target was detected as a 0.2-mm spot on shielded, standard x-ray photographic film at distances that varied from 30 to 110 cm from the sandwich. Spot size did not increase with distance, suggesting coherence of the x-rays.