The Rapid2 X-ray detection system

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2003-11, Vol.513 (1), p.260-263
• Main Authors: Berry, Andrew, I. Helsby, William, T. Parker, Brian, J. Hall, Chris, A. Buksh, Paul, Hill, Andy, Clague, Nick, Hillon, Mark, Corbett, Garry, Clifford, Paul, Tidbury, Alan, A. Lewis, Rob, J. Cernik, Bob, Barnes, Paul, Derbyshire, G.E.
• Format: Article
• Language: English
• Subjects: Detector development; Synchrotron radiation; X-ray instrumentation
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2003.08.043

A second generation of the Rapid readout electronics has been designed, built and commissioned at Daresbury Laboratory. The first application is for a 1D small- and wide-angle scattering X-ray detection system on the new multipole wiggler 6.2 beam-line at the SRS. The ADC per channel system interpolates and yields typically 32 pixels per channel. The wide-angle detector uses 128 channels of electronics to produce 4096 pixels with a FWHM of four pixels, i.e. demonstrates an ability to resolve 1024 peaks across the detector. This corresponds to an FWHM of 400 μm over a 384 mm long (60°) curved detector. A second group of 128 channels instrument the 200-mm-radius quadrant detector for simultaneous small-angle scattering measurements. System rate of over 2×10 7 events/ s for each detector is predicted. A description of the new pipelined digital processing of detected events is given, together with initial beam-line test results.