Nano-Imaging Under Controlled Environment Using SACLA

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  • SACLAを用いた環境制御ナノイメージング
  • SACLA オ モチイタ カンキョウ セイギョ ナノイメージング

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Abstract

X-rays are a powerful tool for imaging deep inside thick objects under various environments due to their high penetrating power. The ultrashort pulse duration of X-ray free-electron lasers (XFELs) adds a new possibility to achieve higher spatial resolution for radiation sensitive samples by performing X-ray snapshot imaging free from radiation damage. Coherent diffractive imaging (CDI), which allows X-ray nano-imaging without objective lenses, is a suitable tool for XFEL imaging. CDI can quantitatively image transparent phase objects, such as tiny biological samples, by numerically retrieving the phase of the diffraction data. In imaging dynamics in biology, it is critically important to perform measurement under controlled hydrated condition at physiological temperatures. The authors are developing a pulsed coherent X-ray solution scattering (PCXSS), which is an XFEL CDI for solution samples. This article describes the basics of PCXSS and its application to various samples, including living cells and the selfassemblies of gold nano-particles in solution, using the Japanese XFEL facility, SACLA.

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