Advacam’s WidePIX 2(1)X5 camera consists of either 2×5 or 1×5 Timepix devices. The camera can be constructed with Si or CdTe edgeless sensor tiles. The edge-less sensor technology allows placing all tiles together from all sides, leaving no rifts. Thus the whole imaging area of the camera is fully sensitive to the radiation and does not have any gaps between the tiles in the image. The camera is made robust to address industrial users.
The Advacam’s WidePIX 1×5 camera has a built-in Digital Time-Delayed-Integration (DTDI) which proves to be very useful for scanning in industrial applications. It is very advantageous for scanning of larger objects or for some rotating objects where some object parts can leave field of view during CT scanning. WidePIX 2(1)X5 is available with Si and CdTe sensors for analysis of the soft and hard X-ray spectrums, respectively.
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 WidePIX 1×5 camera. The pixels situated on the border of tiles are 2 times bigger in one direction, while the corner pixels of tiles are 2 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 arrangement of tiles in the row is very advantageous for larger object imaging. The hardware based Time- Delayed-Integration mode enables online (continuous) scanning applications. Both devices are suitable for CT scanners, which can take advantage of large sensitive area without any gaps. The Timepix technology allows setting of energy threshold. This feature allows obtaining multichannel “color” radiographs where different materials are identified and imaged in different colors (similar to color photography). This feature requires getting of several (at least two) subsequent snapshots with different settings of the energy threshold. The minimum energy threshold is typically better than 5 keV. The camera is connected to the controlling computer via USB 2.0 cable. The readout time is 50 (25) ms per frame resulting in maximal speed of 20 (40) frames per second.
Sensor Material: Si or CdTe
Sensor Thickness: 100 μm, 300 μm and 500 μm for Si; 1 mm for CdTe
Sensitive Area: 70.4 mm x 14 mm (1×5 tiles)
Number of Pixels: 256 x 1280 (1×5 tiles)
Sensitive Area: 70.4 mm x 28 mm (2×5 tiles)
Number of Pixels: 512 x 1280 (2×5 tiles)
Pixel Pitch: 55 μm
Resolution: 9 lp/mm
Readout Speed: 40 (1×5 tiles) and 20 (2×5 tiles) frames/s
Photon Counting Speed: up to 3 x 106 photons/s/pixel
Continuous readout (DTDI): Yes (1×5 tiles)
Threshold Step Resolution: 0.1 keV
Energy Resolution: 0.8 keV (THL) and 2 keV (ToT)
Min Detectable Energy: 5 keV for X-rays
Readout Chip: Timepix
Pixel Mode of Operation: Counting, Time-over-Threshold, Time-of -Arrival
Main power supply (via standard M8 connector with 3 female contacts). Connect after plugging USB connector.
USB type micro B, Standard USB 2.0 Hi-Speed, In IP68 protection.
Connector Two 4-pin M8 connectors (female for outputs and male for input) serve as synchronization interface, allowing to synchronize WIDEPIX2(1)x5 detector with external processes. Four signals are available:
Ready in – measurement is not possible, when signal at logical zero
Trigger in – logical zero starts shutter (measurement)
Ready out – logical one if device is ready to for new shutter
Trigger out – mirrors shutter (logical zero when shutter is active)
All signals are TTL compatible and 5V tolerant. For detailed description see Synchronization Guide.
Sync. Outputs (M8-4 Female)
Sync. Inputs (M8-4 Male)
Water cooling interface
It is mandatory to cool down detector when in operation. WIDEPIX2(1)x5 uses water connectors that allow for quick disconnection/reconnection. Mating connector is included as standard accessories and has to be attached to 4x6mm plastic hose.