Speed matters. When an X-ray photon excites an atom or ion, making a core electron jump onto a higher energy level, a short-lived window of opportunity opens. For just a few femtoseconds, before an ...

Imaging in the water window has traditionally relied on large synchrotron radiation sources. Now, a tabletop tunable X-ray source which generates water-window X-ray photons from a low energy electron ...

X-ray detection is critical for applications in medical diagnosis, industrial inspection, security checks, scientific inquiry and space exploration. Recent advances in materials science, electronics, ...