Detectors for B-SAXS/D
Experiments on BL 4-2
Linear gas proportional
counter |
CCD Detectors (Image-Intensified and Fiber-Coupled)
|
|
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B-SAXS/D Detectors
1.
Linear gas proportional counter from EMBL-Grenoble
2.
Quadrant gas proportional counter from EMBL-Grenoble
3.
Hamamatsu image-intensified X-ray CCD detector
4.
MarCCD 165 (Fiber Optic-Taper coupled CCD) detector
Type of Detector
|
Properties
|
Gas chamber detectors: linear,
quadrant &
2-D photon counting
(EMBL gas detectors)
|
least
noise (photon counting), wide dynamic range limited by high local count
rate due to a space charge effect, fast readout (< 1ms), fast image acquisition
rate high uniformity, relatively large area
|
Image-intensified CCD detectors
(Hamamatsu CCDs)
|
no counting limitation (integrated-type
detector),
high sensitivity, relatively large area covered with one chip rapid data
acquisition ~10Hz (full frame rate) ~100Hz (progressive scan) X-ray I.I.
can be used as an ultra-fast electronic shutter with a time resolution of
micro second
|
Fiber Optic-tape (FOT)-CCD detector
(MarCCD) |
no counting limitation (integrated-type detector), small
pixel size (~80micron), low image distortion and non-uniformity of response,
rapid data acquisition ~0.5Hz (2 x 2 binning mode), requires an external
X-ray shutter during readout |
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