Abstract
We proposed the stand-off inspection of unknown or hidden objects by a laser-produced X-ray that has a
great potential for security applications or disaster relief. To demonstrate its principle, ultra-intense
laser-produced sub-ps X-ray pulses detected backscattered signals from objects hidden in a container
with the coincident technique. Coincident measurement with primary X-rays enabled differentiation
inside an aluminum container among the following object materials: acrylic, copper, and lead blocks.
The spectrum of these backscattered signals can distinguish the atomic number of the materials. To
realize a collimated X-ray source to scan these objects, we proposed X-ray generation by inverse
Compton scattering of laser-plasma accelerated electrons. We also presented the present status of this
X-ray generation.
