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DOE OSTI · 2439730

VeryFastCCD: a high frame rate soft X-ray detector

Goldschmidt, Azriel·Grace, Carl·Joseph, John·Krieger, Amanda·Tindall, Craig·Denes, Peter
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Abstract

Direct X-ray detection in silicon has been transformative for scattering experiments in biology and materials science. While bump-bonded hybrid pixels have been attractive for hard X-ray detection, the challenge for single photon soft X-ray detection is sufficiently low noise. CCD structures on thick, high-resistivity silicon have been successfully used as sensors over the range of soft to hard X-rays at storage rings and FELs. The VeryFastCCD is a high frame rate, column-parallel CCD sensor with 48 μm pixels. Combined with 256-channel custom readout ASICs, frame rates of 5–10 kHz have been achieved with readout noise as low as 20 e and full-well capacity >4 × 10 5 e/pixel. Thin (10 nm and 100 nm) entrance window contact processes have also been developed which provide >85% quantum efficiency for 285 eV X-rays. Systems are currently being developed for several beamlines at the upgraded Advanced Light Source.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGYdirect-detection CCDreadout ASICsensorssoft X-ray detectorthin contacts

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Goldschmidt, Azriel, Grace, Carl, Joseph, John, Krieger, Amanda, Tindall, Craig, Denes, Peter. 2023-10-26. VeryFastCCD: a high frame rate soft X-ray detector. https://doi.org/10.3389/fphy.2023.1285350

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