WidePIX 2×5

Widepix

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.

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Description

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
  • Connectivity: USB 2.0
  • Weight: 1700 g
  • Dimensions: 213 mm x 60 mm x 40 mm (L x W x H)
  • Software: Pixet Pro

Documents

Device parameters

Operating Conditions

Symbol Parameter Min Typ Max Units Comment
TA Ambient Temperature Range 0 30 40 °C Max with heat sink
Φ Humidity     60 % Not condensing
  IP Code   IP50      

Family Parameters

TA = 25°C, VCC = 24V

Symbol Parameter WidePIX 1×5 WidePIX 2×5 Units Comment
VCC Supply Voltage 20/24/26 V  
ICC Supply Current (VCC = 24V) 400 700 mA  
P Power Dissipation 9 16 W  
  Sensitive Area 71.5 x 14.1 71.5 x 28.2 mm  
  Detector Resolution 256 x 1280 512 x 1280 Pixels  
  Frame Rate 40 20 fps  
  Readout Time 25 50 ms  
  Weight 1700 1800 g  

Sensor parameters

TA = 25°C

Symbol Parameter Si CdTe Units Comment
  Thickness 100 300 1000 1000 µm  
  Bias Voltage 50 200 500 -500 V Max
  Calibrated in X-ray Energy Range           See chart below
  Energy resolution            
  Detectable energy range 5 to 60 5 to 600 keV  

Device Description

+24V DC connector

Main power supply (via standard M8 connector with 3 female contacts). Connect after plugging USB connector.

USB connector

USB type micro B, Standard USB 2.0 Hi-Speed, In IP68 protection.

Synchronization interface

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)
Pin Signal Pin Signal
1 Gnd 1 Gnd
2 Ready out 2 Ready out
3 Trigger out 3 Trigger out
4 Reserved 4 Reserved

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.

Mechanical Dimensions

All dimensions are in mm.

Sensitive Area

 

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