Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser

X-rays are used extensively for medical imaging and airport security, as well as for examining the atomic-scale crystallographic structure of materials. Until recently, the high-energy x-rays needed to probe materials at the atomic level could only be produced by very large ring accelerators known as synchrotrons. The development of a new type of x-ray source, called x-ray free-electron lasers (XFELs), has since made it possible to produce intense, ultrashort pulses of x-ray light that have dramatically expanded the utility of x-ray-based material characterization techniques.

from Phys.org: Physics News http://ift.tt/1f26qUx

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