Qualification Of Ardesia Sdd X-Ray Spectrometer In Synchrotron Measurements
2018 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE PROCEEDINGS (NSS/MIC)(2018)
摘要
This work reports the results of the measurements using ARDESIA X- ray spectrometer in synchrotron measurements. ARDESIA is an SDD-based, multichannel X-ray spectrometer, optimized for synchrotron applications that require a high-count rate (> 1Mcps/channel) and high-resolution (<130eV of FHWM Mn-K alpha line at optimum shaping time, <= 200eV at short shaping times) X-ray fluorescence detection. The main applications of the ARDESIA detector are X-ray fluorescence (XRF) and X-ray absorption fine structure (XAFS) techniques. The detector is based on a monolithic array of 4 SDD with 25mm(2) active area (collimated to 16mm2) each, which optimizes detector solid angle. After the optimization of the 4-channels detection module, the mechanical structure grants cooling, with a double Peltier strategy, vacuum, insulation from the harsh surrounding environment and possibility to place side-by-side several SDD modules to realize a larger number of channels. The detector signals are amplified by a monolithic four-channels CUBE preamplifier chip and processed by digital pulse processors (e.g. XGLab-DANTE, 4-channel XIA DXP-XMAP) to achieve good energy resolution at high count rates. Successful campaign of measurements at the DA Phi NE DXR1 soft X-ray beamline in Frascati, Italy and ESRF LISA BM-08 beamline in Grenoble, France, such as XRF measurements in soft x-ray energy range, and long-duration consecutive XAFS measurements using various samples, confirm the qualification and performance of the instrument, in terms of energy resolution, throughput capability, immunity against external disturbances, and stability.
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关键词
X-ray energy range,XAFS measurements,FHWM Mn-Kalpha line,SDD-based X-ray spectrometer,multichannel X-ray spectrometer,double Peltier strategy,XRF measurements,DAΦNE DXR1 soft X-ray beamline,four-channels CUBE preamplifier chip,detector signals,SDD modules,harsh surrounding environment,mechanical structure grants,4-channels detection module,detector solid angle,ARDESIA detector,optimum shaping time,high-count rate,synchrotron applications,synchrotron measurements,ARDESIA SDD X-ray spectrometer
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