Development of a large array of Silicon Drift Detectors for high-rate synchrotron fluorescence spectroscopy. (1st January 2023)

• Record Type: Journal Article
• Authors: Chen, W.; Giacomini, G.; Kuczewski, A.; Mead, J.; Rumaiz, A.K.; Siddons, D.P.
• Is Part Of: Journal of instrumentation. Volume 18:Number 1(2023)
• Publication Date: 2023-01-01
• Subjects: X-ray detectors -- Spectrometers -- X-ray fluorescence (XRF) systems; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/18/01/P01016
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: An array of small-area Silicon Drift Detectors (SDD), named Hera, has been developed at Brookhaven National Laboratory (BNL) in the past few years. Its primary application is high-rate spectroscopy at synchrotrons. Each SDD pixel is a 1 mm × 1 mm square to match the footprint of the original diode-based pixel detector called Maia, which was developed for the same application. The replacement of the diode with an SDD allows for better energy resolution at short shaping times and an increased stability of the detector. 32, 96, and 384-channel arrays were designed and fabricated and achieved a Full Width Half Maximum (FWHM) as low as 176 eV at 5.9 keV with peaking time of 1 μs at -13°C. The sensor design, simulation, fabrication, its readout system, and its spectroscopic performance are reported.