Report
X-ray spectral performance of the Sony IMX290 CMOS sensor near Fano limit after a per-pixel gain calibration
| العنوان: | X-ray spectral performance of the Sony IMX290 CMOS sensor near Fano limit after a per-pixel gain calibration |
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| المؤلفون: | Schneider, Benjamin, Prigozhin, Gregory, Foster, Richard F., Bautz, Marshall W., Fu, Hope, Grant, Catherine E., Heine, Sarah, Juneau, Jill, LaMarr, Beverly, Limousin, Olivier, Lourie, Nathan, Malonis, Andrew, Miller, Eric D. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | The advent of back-illuminated complementary metal-oxide-semiconductor (CMOS) sensors and their well-known advantages over charge-coupled devices (CCDs) make them an attractive technology for future X-ray missions. However, numerous challenges remain, including improving their depletion depth and identifying effective methods to calculate per-pixel gain conversion. We have tested a commercial Sony IMX290LLR CMOS sensor under X-ray light using an $^{55}$Fe radioactive source and collected X-ray photons for $\sim$15 consecutive days under stable conditions at regulated temperatures of 21{\deg}C and 26{\deg}C. At each temperature, the data set contained enough X-ray photons to produce one spectrum per pixel consisting only of single-pixel events. We determined the gain dispersion of its 2.1 million pixels using the peak fitting and the Energy Calibration by Correlation (ECC) methods. We measured a gain dispersion of 0.4\% at both temperatures and demonstrated the advantage of the ECC method in the case of spectra with low statistics. The energy resolution at 5.9 keV after the per-pixel gain correction is improved by $\gtrsim$10 eV for single-pixel and all event spectra, with single-pixel event energy resolution reaching $123.6\pm 0.2$ eV, close to the Fano limit of silicon sensors at room temperature. Finally, our long data acquisition demonstrated the excellent stability of the detector over more than 30 days under a flux of $10^4$ photons per second. Comment: 15 pages, 7 figures, accepted for publication in JATIS |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2409.05954 |
| رقم الانضمام: | edsarx.2409.05954 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |