In this paper, we are presenting the Percival detector, a monolithic CMOS Imager for detection of soft x-rays in Synchrotron Rings and Free Electron Lasers. The imager consists in a 2D array of many (2M) small (27um pitch) pixels, without dead or blind zones in the imaging area. The imager achieves low noise and high dynamic range by means of an adaptive-gain in-pixel circuitry, that has been validated on prototypes. The imager features on-chip Analogue-to-Digital conversion to 12+1 bits, and has a readout speed which is compatible with most of Free Electron Laser Facilities. For direct detection of low-energy x-rays, the imager is back-illuminated and post-processed to achieve 100% fill factor.
Percival: A soft x-ray imager for synchrotron rings and free electron lasers
Alessandro Marras, Cornelia Wunderer, Jonathan Correa, Benjamin Boitrelle, Peter Goettlicher, Manuela Kuhn, Frantisek Krivan, Sabine Lange, Frank Okrent, Igor Shevyakov, Joshua Supra, Maximilian Tennert, Manfred Zimmer, Nicola Guerrini, Ben Marsh, Iain Sedgwick, Giuseppe Cautero, Dario Giuressi, Anastasya Khromova, Ralf Menk, Giovanni Pinaroli, Luigi Stebel, Alan Greer, Tim Nicholls, Ulrik Pedersen, Nicola Tartoni, Hyo Jung Hyun, Kyung Sook Kim, Seung Yu Rah, Heinz Graafsma; Percival: A soft x-ray imager for synchrotron rings and free electron lasers. AIP Conf. Proc. 15 January 2019; 2054 (1): 060060. https://doi.org/10.1063/1.5084691
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