| Popis: |
Non-invasive real-time detection and identification of high explosives and improvised explosive devices, illicit materials hidden inside suitcases, vehicles, containers or behind metal and non-metal walls become critically important for safety and security worldwide. In this paper we will discuss non-scanning, portable real-time detection X-ray backscattering system based on novel Lobster-Eye X-ray focusing optics, which focuses backscatter photons from fully obscured objects several meters away that are being irradiated by short high-power X-ray pulses. Due to the ability of Lobster-Eye lenses to focus X-rays, such imaging systems collect more photons into a smaller spot, compared to traditional pinhole systems. This results in a higher signal-to-noise ratio and better spatial resolution. The signal-to-noise ratio can be further improved by using pulsed X-ray irradiation and a gated X-ray camera. The images can be further improved by software processing, which allows to reconstruct the object with high accuracy adequate for detection with high probability and low false alarm rate. |
