These proceedings comprise invited and contributed papers presented at the 14th International Conference on X-Ray Lasers (ICXRL 2014). This conference is part of a continuing series dedicated to recent developments and applications of x-ray lasers and other coherent x-ray sources with attention to supporting technologies and instrumentation.

New results in the generation of intense, coherent x-rays and progress toward practical devices and their applications in numerous fields are reported. Areas of research in plasma-based x-ray lasers, 4th generation accelerator-based sources and higher harmonic generation, and other x-ray generation schemes are covered.

The scope of ICXRL 2014 included, but was not limited to:

• Laser-pumped X-ray lasers
• Discharge excitation and other X-ray laser pumping methods
• Injection/seeding of X-ray amplifiers
• New lasing transitions and novel X-ray laser schemes
• High Harmonic sources-Free-electron laser generation in the XUV and X-ray range
• Novel schemes for coherent XUV and X-ray generation
• XUV and X-ray optics and metrology-Driving laser technology
• Theory and modeling of X-ray gain medium and beam characteristics
• Applicationsof high brightness and ultrashort X-ray sources