AdvaPIX QUAD

Advapix

Advacam’s AdvaPIX QUAD camera contains four single Timepix devices with quick parallel readout with a 4 mm2 central opening that allows the beam to pass through the device without any interruption. The AdvaPIX QUAD features a sustainable frame rate of up to 1300 frames/ second.

Description

Each Timepix device has an independent USB 3.0 communication channel that assures fast read-out of the complete system. All modules in the system are operated synchronously and triggered independently. The fast modules with Si or CdTe pixel detectors Timepix can be also used in different configurations such as stack of many layers or tiling to cover larger area or combination of both.The thickness and type of sensor can be customized as per requirements.

Advacam’s AdvaPIX QUAD is specially designed to perform both Wide Angle X-ray Scattering (WAXS) and Small Angle X-ray Scattering (SAXS). The open space in the center of the camera completely eliminates the need of a beam stop in front of the camera.
 
  • Sensor Material: Si or CdTe
  • Sensor Thickness: 100 μm, 300 μm and 500 μm for Si; 1 mm for CdTe
  • Sensitive Area: 28 mm x 28 mm
  • Number of Pixels: 512 x 512
  • Pixel Pitch: 55 μm
  • Resolution: 9 lp/mm
  • Readout Speed: 1300 frames/s
  • Photon Counting Speed: Up to 3 x106 photons/s/pixel
  • 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 3.0
  • Weight: 1500 g
  • Dimensions: 260 x 250 x 35
  • Software: Pixet PRO

Documents


Device parameters

Operating Conditions

Symbol Parameter Min Typ Max Units Comment
TA Temperature Range 0 50 70 °C  
Φ Humidity     60 % Not condensing

Electrical Specification

TA = 25°C, USB voltage VCC = 4.8V
Symbol Parameter Min Typ Max Units Comment
VCC Supply Voltage 28 24 20 V  
ICC Supply Current          
ICC1 Chip active     1000 mA  
P1 Power Dissipation     24 W  
BNC Inputs          
VINL Voltage Low 0   0.7 V  
VINH Voltage High 1.7   5.0 V  
BNC Outputs          
VOUTL Output Voltage Low 0   0 V  
VOUTH Output Voltage High   4.5 5.0 V  
Bias Voltage Source for Sensor Diode          
VBIAS Bias Voltage 0   ±450 V Polarity is sensor dependent

 

Symbol Parameter Min Typ Max Units Comment
f Frame Rate     1300 fps with USB 3.0 cable
TREAD Frame Readout Time   588   μs with USB 3.0 cable
dT Time resolution 20 100   ns  

Sensor parameters

TA = 25°C
Symbol Parameter Si CdTe Units Comment
  Thickness 100 300 500 675 1000 µm  
σ Energy resolution of energy discrimination threshold (σ @ 23 keV) 0.5 1.1 keV  
σ Energy resolution of energy discrimination threshold (σ @ 60 keV) 0.6 1.5 keV  
σ Energy resolution in full spectral mode (σ @ 23 keV) 0.7 1.3 keV  
σ Energy resolution in full spectral mode (σ @ 60 keV) 1.0 1.5 keV  
  Typical detectable energy range for X-rays3 5 to 60 5 to 600 keV See chart below
  Pixel size 55 55 µm  
 
 

+24VDC connector

Main power supply (via standard 2.1 mm barrel connector).

USB connector

USB 3.0 type micro B, Standard USB 3.0 Super-Speed. All USBs must be connected to the computer.

BNC synchronization connectors

All the BNC input signals (if not used) are tight to its neutral state, where the offered feature is disabled.
  • Ready In – input signal (gate-in signal that disables the measurement when at logical zero).
  • Ready Out – equals one if the ready in signal is in logical one and at the same time the Device has finished current cycle (is ready for a new cycle). This signal may be used as Busy out signal commonly used in other
  • Trigger In – initiates shutter according to TriggerStg Use only when Master not connected.
  • Trigger Out – mirroring shutter of the Device.

Synchronization waveform example

Note1: the decisive leading edges are indicated in orange color.
Note2: WidePIX 2×2 is Master, cooperating device is Slave
Depending on the TriggerStg value, the behavior of shutter signal is following (see figure below for graphical visualization of described behavior).
 

TriggerStg value

Detector performs measurement (activated shutter), when:

0 (log 0)

Trigger-In signal is logical zero => the camera starts measurement and keeps measuring frames as long as the trigger-in signal is in logical zero.

1 (log 1)

Trigger-In signal is logical one => the camera starts measurement and keeps measuring frames as long as the trigger-in signal is in logical one.

2 (rising edge)

Trigger-In signal is changing from zero to one => the camera measures only one frame.

3 (falling edge)

Trigger-In signal is changing from one to zero => the camera measures only one frame.

Without protection cover

All dimensions are in mm.

 

With protection cover

All dimensions are in mm.

Configuration Examples

WAXS/SAXS (Wide/Small angle X-ray scattering)

Combination of MiniPIX and AdvaPIX Quad – compact WAXS and SAXS system:
 
1 A final picture can be created as sum of individual images. The dynamic range is limited only by the measurement time.
2 During Readout time (or Dead time), no charge is collected from the sensor.
3 The maximum detectable energy is limited only by sensitivity of the selected sensor for the given radiation type. The maximum measured energy can reach several MeV in case of heavy charged particles

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