Speaker
Dr
Kan-Cheung Cheung
(Daresbury Laboratory)
Description
Gas filled multi-channel detectors are ideally suited for x-ray
applications that require photon counting and position sensitivity.
This type of proportional counters is superior in time resolving
experiments where low dark noise and microseconds resolution are
essential, eg. SAXS/WAXS for investigating polymer formation and XRD
for studying mineral crystal growth. Gas Micro Strip Detector
(GMSD) has excellent geometric characteristics. It has fine pitch
micro-patterns formed by lithography and uniform flatness provided
by the glass substrate. The performance of the GMSD can be enhanced
by the use of the RAPID2 readout system. This advanced system
consists of novel digital signal processing (DSP) and parallel
readout electronics technology successfully developed at Daresbury
Laboratory. It is capable of a stunning overall rate of over 40
million events per second when operated in 1D and 15 million
events/s in 2D. RAPID2 employs ultra fast sampling and
interpolation processes that can enhance the inherent spatial
resolution defined by the geometric anode pitch on the GMSD. The
readout algorithm collects comprehensive information on each photon
interaction and thus makes an excellent diagnostic tool on detector
response to x-rays. We will demonstrate these by testing and
optimising the current RAPID2 readout electronics on a 1D sector
(finger/keystone) GMSD.
Primary author
Dr
Kan-Cheung Cheung
(Daresbury Laboratory)
