This volume contains the invited and contributed papers presented at the Seventh International Conference on X-Ray Lasers. It provides not only an overview and an up-to-date progress report on this fast moving field, but also important reference material on which future work can be built.

Topics covered include : transient collisional excitation X-ray lasers, capillary discharge-pumped X-ray lasers, OFI X-ray lasers, other collisional X-ray lasers, other routes to X-ray and Gamma-ray lasers, theory for X-ray lasers and modeling of amplified beams, high-order harmonics X-UV radiation and other high brightness X-ray sources, applications of X-ray lasers and other bright X-ray sources, X-UV optics and instrumentation, investiations on X-ray laser media, and development of X-ray laser drivers.