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The ePix10k 2-megapixel hard X-ray detector at LCLS.
Journal of Synchrotron Radiation ( IF 2.251 ) Pub Date : 2020-04-17 , DOI: 10.1107/s1600577520004257
Tim Brandt van Driel,Silke Nelson,Rebecca Armenta,Gabriel Blaj,Stephen Boo,Sébastien Boutet,Dionisio Doering,Angelo Dragone,Philip Hart,Gunther Haller,Christopher Kenney,Maciej Kwaitowski,Leo Manger,Mark McKelvey,Kaz Nakahara,Marco Oriunno,Takahiro Sato,Matt Weaver

The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-electron laser (XFEL) applications. The hybrid pixel detector was developed at SLAC to provide a hard X-ray area detector with a high dynamic range, running at the 120 Hz repetition rate of the Linac Coherent Light Source (LCLS). The ePix10k consists of 16 modules, each with 352 × 384 pixels of 100 µm × 100 µm distributed on four ASICs, resulting in a 2.16 megapixel detector, with a 16.5 cm × 16.5 cm active area and ∼80% coverage. The high dynamic range is achieved with three distinct gain settings (low, medium, high) as well as two auto-ranging modes (high-to-low and medium-to-low). Here the three fixed gain modes are evaluated. The resulting dynamic range (from single photon counting to 10000 photons pixel-1 pulse-1 at 8 keV) makes it suitable for a large number of different XFEL experiments. The ePix10k replaces the large CSPAD in operation since 2011. The dimensions of the two detectors are similar, making the upgrade from CSPAD to ePix10k straightforward for most setups, with the ePix10k improving on experimental performance. The SLAC-developed ePix cameras all utilize a similar platform, are tailored to target different experimental conditions and are designed to provide an upgrade path for future high-repetition-rate XFELs. Here the first measurements on this new ePix10k detector are presented and the performance under typical XFEL conditions evaluated during an LCLS X-ray diffuse scattering experiment measuring the 9.5 keV X-ray photons scattered from a thin liquid jet.
更新日期:2020-04-17

 

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