WidePIX L 2(1)x10

The large area imaging detector WIDEPIX L2(1)x10 – MPX3 with a resolution of 512 (256) x 2560 pixels is composed of Medipix3 hybrid detector electronics tiles. Each tile (256 x 256 pixels) is attached to a silicon or CdTe sensor. Therefore, the whole area of the WIDEPIX L2(1)x10 – MPX3 device is fully sensitive, and there are no gaps between sensor tiles. Each pixel has two integrated 12-bit digital counters and two energy discrimination thresholds. The counters store a number of registered particles, e.g., X-ray photons, with energy above the appropriate threshold. Both counters can be joined to a single 24-bit counter, providing an enhanced dynamic range. The particle counting principle eliminates any additional noise generated by the sensor or electronic readout. It allows for acquiring X-ray images with high contrast and wide dynamic range. Therefore, even low-contrast structures such as plastic or soft tissue are easily detectable in X-ray images.

The camera is suitable for CT scanners, which can take advantage of large sensitive areas without gaps. The WIDEPIX L1x10 – MPX3 variant moreover supports a hardware-based Time-Delayed-Integration mode for online (continuous) scanning applications.

The energy discrimination thresholds of Medipix3 technology allow spectral X-ray imaging. Different materials in an inspected sample could then be identified based on their spectral X-ray attenuation properties. Energy spectra could be measured typically from 5 keV upwards. The intrinsic spatial resolution of the camera is defined by pixel size, which is 55 µm. The pixels on the tiles’ border are 2 times larger in one direction. The corner pixels of tiles are 2 times larger in both directions.

The Charge Summing Mode implemented in the pixel electronics provides hardware-based correction of signal cross-talk between pixels. This further considerably improves the detector spectral response and, therefore, also the quality of spectra measured in individual pixels.

The camera is connected to a computer via two ethernet cables.