Study of Vapor Columns for Discharge Pumped X-Ray Lasers

摘要

Capillary discharge XUV laser at 46.9 nm with Ne-like Ar media was recently demonstrated by Rocca and colleagues. Lasing at 60.8 nm in Ne-like Sulfur, which is solid in room temperature, was also demonstrated by Tomasel and colleagues, using the concept of an ablative secondary capillary injecting Sulfur vapor with suitable properties into the main capillary.The possibilities of producing Titanium vapor column for shorter wavelength discharge pumped X-Ray lasers are studied. Generating vapor column from a secondary capillary can be achieved in various methods including wall ablation, electrode ablation (arc), and wire or foil explosion.In this study we generate plasma jets from a small capillary and study their velocity and propagation by means of visible light framing and streak photography. Other properties of the plasma are studied by visible light spectroscopy. Control of plasma parameters is achieved through changes in discharge and capillary parameters.