Laser based, intense, high rep.-rate x-ray source (1keV-10keV) from nsec to subpsec

摘要

The aim of this work is the development of a laser based, intense, compact, high repetition x-ray source with variable pulse duration. This is to be achieved using a short pulse (150fsec and/or 450fsec) excimer laser (248nm) to illuminate a metal surface with p-polarized light at about the Brewster angle for maximum laser absorption. The experiments will performed using a diode arrangement with an anode charged to 0-30kV to draw off the photoelectrons emitted from a metallic photocathode. In a first experiment the laser flux is kept low enough to prevent plasma formation so that the resulting photo-electron pulse has about the same duration as the incident light.