Widepix
Advacam’s WidePIX 2(1)x5 – MPX3 camera consists of either 2×5 or 1×5 Medipix3 devices. Each pixel has two 12-bit digital counters integrated together and two energy discrimination thresholds. To enhance dynamic range, both counters can be joined to a single 24-bit counter. The camera can be constructed with Si or CdTe edge-less 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.
Device parameters
Symbol | Parameter | Min | Typ | Max | Units | Comment |
TA | Temperature Range | 0 | 30 | 40 | °C | |
Φ | Humidity | 55 | 60 | % | Not condensing | |
IP Code | IP50 |
TA = 25°C, VCC = 24V
Symbol | Parameter | WidePIX 1×5 – MPX3 | WidePIX 2×5 – MPX3 | Units | Comment |
VCC | Supply Voltage | 20/24/26 | V | Min/Typ/Max | |
ICC | Supply Current (VCC = 24V) | 340/680 | 800/1600 | mA | Typ/Max |
P | Power dissipation | 9/18 | 16/36 | W | Typ/Max |
A | Sensor Area | 71.5 x 14.1 | 71.1 x 28.2 | mm | |
Detector Resolution | 256 x 1280 | 512 x 1280 | Pixels | ||
f | Frame Rate1 | 50 | 20 | fps | |
TREAD | Readout Time2 | 20 | 50 | ms | |
m | Weight | 1700 | 1800 | g |
Type | Mode | Bit depth | Description |
Frame (reading all pixels) | SPM-1Ch | 12/24 bit/frame | Single Pixel Mode using one counter: Every pixel works independently of its neighbours. One energy threshold (energy channel) is available. 1 output image: Number of events per pixel |
SPM-2Ch | 12 bit/frame | Single Pixel Mode using both counters: Every pixel works independently of its neighbours. Two energy thresholds (energy channels) are available. 2 output images: Number of events per pixel | |
CSM | 12/24 bit/frame | Charge Summing Mode: The charge from 4 adjacent pixels is summed and is assigned to the pixel with the largest charge deposition. The event is counted only if the sum of singals exceeds the energy threshold. 1 output image: Number of events per pixel |
All modes can be operated at two ranges: Broad / Narrow / Super Narrow3
Typical values for 300 µm Silicon sensor, TA = 20°C.
Range | Mode | Min Energy [keV] | Max Energy [keV] | Resolution*@Cu- Kα (cca 8 keV) | Resolution* @Zr- Kα (cca 15 keV) | Resolution* @Pb- Kα (cca 75 keV) |
Super Narrow | SPM | 2.5 – 4.0 | 100 – 110 | 0.7 – 1.5 | 3.5 – 7.0 | |
Narrow | SPM | 2.5 – 4.0 | 160 – 180 | 0.8 – 1.3 | – | 3.0 – 3.8 |
CSM | 6.0 | – | 1.5 | 1.5 | 12.0 | |
Broad | SPM | 5.0 – 6.5 | 260 – 290 | 1.6 – 2.0 | – | 3.3 – 4.0 |
CSM | 8.0 | – | – | 2.3 | 5.8 |
Typical values for 1000 µm CdTe sensor, TA = 20°C
Range | Mode | Min Energy [keV] | Max Energy [keV] | Resolution*@Cu- Kα (cca 8 keV) | Resolution* @Zr- Kα (cca 15 keV) | Resolution* @Pb- Kα (cca 75 keV) |
Super Narrow | SPM | 5.0 – 10 | ||||
CSM | 10 – 20 | |||||
Narrow | SPM | 5.0 – 10 | ||||
CSM | 10 – 20 | |||||
Broad | SPM | 5.0 – 10 | ||||
CSM | 10 – 20 |
*resolution in Sigma of gaussian
Sensor material
Symbol | Parameter | Si | CdTe | Units | Comment | |
Thickness | 300 | 1000 | 1000 | µm | ||
Vbias | Bias Voltage | 200 | 500 | -450 | V | Max |
Typical detectable energy range for X-rays* | up to 60 | up to 600 | keV | See chart below | ||
Pixel size | 55 x 55** | µm2 |
*to get true detector response, detectable energy and quantum efficiency of sensor chip has to be combined with energy range of readout chip (see chapter “Energy range and resolution”)
** Pixels on tile borders are 2.5 times larger in one direction. The corner tile pixels are 2.5 times larger in both directions.
USB type A, Standard USB 2.0 Full-Speed, in IP68 protection.
Main power supply (via standard M8 connector with 3 female contacts) Connect after plugging USB connector.
Two 4-pin M8 connectors (female for outputs and male for input) serve as synchronization interface, allowing to synchronize WIDEPIX2(1)x5 – MPX3 detector with external processes. Four signals are available:
All signals are TTL compatible and 5V tolerant. For detailed description see Synchronization Guide.
Sync. Outputs (M8-4Female) |
Sync. Inputs (M8-4Male) |
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Pin | Signal | Pin | Signal |
1 | Gnd | 1 | Gnd |
2 | Ready Out | 2 | Trigger In |
3 | Trigger Out | 3 | Ready In |
4 | Reserved | 4 | Reserved |
It is mandatory to cool down detector when in operation. WIDEPIX2(1)x5 – MPX3 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.
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All dimensions are in mm. |
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1 Operating parameters: Shutter time=1ms, Mode = CSM or SPM-1Ch 12bit resolution.
2 During Readout time (or Dead time), no charge is collected from the sensor.
3 Except CSM mode Silicon sensor.
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