WidePIX 5×5

The large area of WidePIX 5×5 with resolution of 1280 x 1280 pixels i.e. 1.63Mpixels and continuously sensitive surface is composed of a row of detector tiles. Each tile consists of a single Timepix hybrid detector (256 x 256 pixels) with an edgeless silicon or CdTe sensor. The minimum detectable energy is typically 5 keV in case of X-ray photons. The intrinsic spatial resolution of the camera is defined by pixel size which is 55 µm for Advacam’s WidePIX 5X5. The pixels situated on the border of tiles are 2.5 times bigger in one direction, while the corner pixels of tiles are 2.5 times larger in both directions.

Each pixel has integrated digital counter that counts number of particles e.g. X-ray photons. The particle counting principle assures a noiseless detection with no additional noise due to image integration or readout. The noiseless detection allows getting X- ray images with very high contrast and broad dynamic range. Therefore, even structure of low attenuating objects, such as plastic or soft tissue, is imaged with a high contrast. The Timepix technology allows setting of energy discrimination threshold. This feature allows obtaining multi-energy-channel “color” radiographs where different materials are identified and imaged in colors (similar to color photography). The minimum energy threshold is typically better than 5 keV.

The camera is connected to the computer via USB 2.0 interface with readout time of 0.65 seconds/ frame. The thermal stabilization of the camera is taken care by an active water cooling system with chiller. The power consumption is 25 W.