A low noise CMOS camera system for 2D resonant inelastic soft X-ray scattering
In: Frontiers in Physics, Jg. 11 (2023-11-01)
Online
academicJournal
Zugriff:
Resonant Inelastic X-ray Scattering (RIXS) is a powerful spectroscopic technique to study quantum properties of materials in the bulk. A novel variant of RIXS, called 2D RIXS, enables concurrent measurement of the scattered X-ray spectrum for a wide range of input energies, improving on the typically low throughput of 1D RIXS. In the soft X-ray domain, 2D RIXS demands an X-ray camera system with small pixels, large area, high quantum efficiency and low noise to limit the false detection rate in long duration exposures. We designed and implemented a 7.5 Megapixel back-illuminated CMOS detector with 5 μm pixels and high quantum efficiency in the 200–1,000 eV X-ray energy range for the QERLIN 2D RIXS spectrometer at the Advanced Light Source. The QERLIN beamline and detector are currently in commissioning. The camera noise from in-situ 3 s long dark exposures is 7e− or less and the leakage current is 6.5 × 10−3 e−/(pixel ∙ s). For individual 500 eV X-rays, the expected efficiency is greater than 75% and the false detection rate is ∼1 × 10−5 per pixel.
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A low noise CMOS camera system for 2D resonant inelastic soft X-ray scattering
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Autor/in / Beteiligte Person: | Andresen, Nord ; Bakalis, Christos ; Denes, Peter ; Goldschmidt, Azriel ; Johnson, Ian ; Joseph, John M. ; Karcher, Armin ; Krieger, Amanda ; Tindall, Craig |
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Zeitschrift: | Frontiers in Physics, Jg. 11 (2023-11-01) |
Veröffentlichung: | Frontiers Media S.A., 2023 |
Medientyp: | academicJournal |
ISSN: | 2296-424X (print) |
DOI: | 10.3389/fphy.2023.1285379 |
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