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SAXS beamline

2D Pilatus3 1M Detector System

 

The Pilatus3 1M detector system (https://www.dectris.com/pilatus3_specifications.html#main_head_navigation) operates in "single photon counting" mode and is based on the CMOS hybrid pixel technology: the X-rays are directly transformed into electric charge, and processed in the CMOS readout chips. This new design has no dark current or readout noise, a high dynamic range of 20 bits (~1 million counts), a read-out time of less than 1 ms, a frame rate of up to 500 images/s and an excellent point spread function of 1 pixel. The data are stored in TIF format and can be directly processed with FIT2D [1]

  
Technical specifications:

Pixel size: 172 x 172 µm2
Format 1 module 487 x 195 = 94,965 pixels
Module size 83.8 x 33.5 mm2
Number of modules 2 x 5 = 10
Total area 168.7 x 179.4 mm2
Total number of pixels 981 x 1043 = 1023183
Intermodule gap x: 7 pixels, y: 17 pixels, 7.2 % of total area
Sensor reverse-biased silicon diode array
Energy range 5 - 36 keV
Dynamic range 20 bits (1:1,048,573)
Counting rate per pixel 107 photons/s
Energy resolution 500 eV
Adjustable threshold range 2.7 – 18 keV
Threshold dispersion 50 eV
Readout time 0.95 ms
Framing rate 500 Hz
Point-spread function 1 pixel
Data formats Raw data, TIF, EDF, CBF
External trigger/gate 5V TTL

[1] A.P. Hammersley, "Fit2D: an introduction and overview", ESRF Internal Report, ESRF97HA02T, 1997
 


          

2D Pilatus 100K Detector System

 

The Pilatus 100K detector system (http://www.dectris.com/sites/pilatus100k.html) operates in "single photon counting" mode and is based on the CMOS hybrid pixel technology: the X-rays are directly transformed into electric charge, and processed in the CMOS readout chips. This new design has no dark current or readout noise, a high dynamic range of 1000000 (20 bits), a read-out time of less than 3 ms, a framing rate of over 200 images/s and an excellent point spread function of < 1 pixel.
The data are stored in TIF format and can be directly processed with FIT2D [1]

Technical specifications:

Pixel size: 172 x 172 µm2
Format 487 x 195 = 94,965 pixels
Area 83.8 x 33.5 mm2
Dynamic range 20 bits (1:1,048,576)
Counting rate per pixel > 2 x 106 X-ray/s
Energy range 3 – 30 keV
Quantum efficiency
(calculated)
3 keV: 80%
8 keV: 99%
15 keV: 55%
Energy resolution 500 eV
Adjustable threshold range 2 – 20 keV
Threshold dispersion 50 eV
Readout time 2.7 ms
Framing rate 300 Hz
Point-spread function 1 pixel
Data formats Raw data, TIF, EDF, CBF
External trigger/gate 5V TTL, 3 different mode

[1] A.P. Hammersley, "Fit2D: an introduction and overview", ESRF Internal Report, ESRF97HA02T, 1997
 


1D Gabriel Type Gas detectors

 

altTwo 1D Gabriel-type detectors are available, which have an active area of 100 x 8 mm2 and 150 x 8 mm2, respectively. Both have 1024 pixels, and thus the corresponding spatial resolution is about 135 microns and 175 microns, respectlively.  They can be used simultaneously, and are run with the data acquisition system  HCI  (Hecus  X-ray  Systems,  Graz,  Austria).  This  detector system  has  the  following performance:

•  Minimal time resolution: 11 microsec
•  Maximum No. of frames: 512
•  Maximum integral count rate: 40 kHz




1D Vantec Detector

 

The high count rate capable Vantec-1 Detector from BrukerAXS Inc. has an active area of 50 x 16 mm and reaches a spatial resolution of about 50 !m. Its new  gas  amplification  principle  based  on  the Microgap  technology  [1]  allows much  higher count  rates  compared  to  the  Gabriel-type gas detectors.  Currently  the  main  limitation  is  the  data  acquisition system with its maximum integral count rate of about 1 MHz. In the present data acquisition system  HCI  (Hecus  X-ray  Systems,  Graz,  Austria)  the  detector  has  the  following performance:

•  Minimal time resolution: 11 microsec
•  Maximum No. of frames: 512 (depending on the no. of channels)
•  Maximum integral count rate: 1 MHz

[1] http://www.bruker-axs.com/x_ray_detectors.html

Last Updated on Tuesday, 11 February 2020 17:20