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Search: WFRF:(Okrent Frank)

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1.
  • Marras, Alessandro, et al. (author)
  • Characterization of the Percival detector with soft X-rays
  • 2021
  • In: Journal of Synchrotron Radiation. - 0909-0495 .- 1600-5775. ; 28, s. 131-145
  • Journal article (peer-reviewed)abstract
    • In this paper the back-side-illuminated Percival 2-Megapixel (P2M) detector is presented, along with its characterization by means of optical and X-ray photons. For the first time, the response of the system to soft X-rays (250 eV to 1 keV) is presented. The main performance parameters of the first detector are measured, assessing the capabilities in terms of noise, dynamic range and single-photon discrimination capability. Present limitations and coming improvements are discussed.
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2.
  • Marras, Alessandro, et al. (author)
  • Percival : A soft x-ray imager for synchrotron rings and free electron lasers
  • 2019
  • In: AIP Conference Proceedings. - : American Institute of Physics (AIP). - 0094-243X. - 9780735417823
  • Conference paper (peer-reviewed)abstract
    • 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. 
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