Paper 13103-18
Paper 13103-18
X-ray optimised CMOS image sensors for the Auroral X-ray Imaging Spectrometer (AXIS)
16 June 2024 • 16:30 - 16:50 Japan Standard Time | Room G213, North - 2F
Abstract
The Auroral X-ray Imaging Spectrometer (AXIS) instrument proposed by the Indian Space Research Organisation’s (ISRO) Space Astronomy Group plans to gather spectral information of the Earth’s aurorae in the 0.3 – 3 keV band from a polar orbit for the first time. Experimental studies of a backside-illuminated (BI) CIS221-X (a prototype CMOS image sensor (CIS) optimised for soft X-ray detection) were conducted at the BESSY II synchrotron, which provided a source of monochromatic X‑rays down to 310 eV for energy resolution measurements to be made. The FWHM at 500 eV was found to be 54 eV, well within the AXIS instrument requirements. Continued studies on the CIS221-X for AXIS include the impact of warmer operating temperatures and different frame rates used. Optimisation of operating conditions has been performed prior to irradiation to later determine performance at end-of-life (EOL). The latest work on this project is presented.
Presenter
The Open Univ. (United Kingdom)
Dr Chiaki Crews has worked at the Open University's Centre for Electronic Imaging (CEI) for over 5 years and is currently a Research Fellow working on a variety of CMOS image sensors. She has most recently been studying Teledyne e2v's CIS221-X prototype soft X-ray detector for ISRO's Auroral X-ray Imaging Spectrometer instrument, alongside testing CIS120 for precision photometry for CSA's CASTOR mission. Prior to this she extensively characterised the radiation damage effects on electro-optical performance of the CIS115 for the JUICE and Comet Interceptor missions. Before moving to the OU, she studied for her PhD at University College London, developing fast, compact X-ray diffraction techniques for non-destructive detection of counterfeit pharmaceuticals.