Alpha Particle X-Ray Spectrometer (APXS) on-board Chandrayaan-2 rover |
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Authors: | M Shanmugam SVS Murty YB Acharya SK Goyal Arpit R Patel Bhumi Shah AK Hait Aditya Patinge D Subrahmanyam |
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Institution: | 1. PLANEX, Physical Research Laboratory, Ahmedabad 380009, India;2. Space Application Centre, Ahmedabad 380015, India |
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Abstract: | Alpha Particle X-ray Spectrometer (APXS) payload configuration for Chandrayaan-2 rover has been completed recently and fabrication of mechanical assembly, PCB layout design and fabrication are in progress. Here we present the design and performance evaluation of various subsystems developed for APXS payload. The low energy threshold of <1 keV and the energy resolution of ∼150 eV at 5.9 keV, for the Silicon Drift Detector (SDD), as measured from the developed APXS electronics is comparable to the standard spectrometers available off-the-shelf. We have also carried out experiments for measuring fluorescent X-ray spectrum from various standard samples from the USGS catalog irradiated by the laboratory X-ray source 241Am with 1 mCi activity. It is shown that intensities of various characteristic X-ray lines are well correlated with the respective elemental concentrations. |
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Keywords: | Alpha Particle X-ray Spectrometer Silicon Drift Detector CSPA X-ray spectrometer |
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