Intense Two-Color Double X-Ray Laser Pulses: Powerful Tool to Study Ultrafast Processes

SACLA is one of only two facilities in the world to offer XFEL as light source to investigate matter, with various applications in biology, chemistry, physics and materials science. XFELs have the capacity to deliver radiation ten billion times brighter and with pulses one thousand times shorter than existing synchrotron X-ray radiation sources. Until now, XFELs have normally emitted one radiation pulse at a single wavelength like conventional visible lasers. 

The in-vacuum variable-gap undulators (about 130 m long) at SACLA

Credit: http://www.riken.jp/