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Träfflista för sökning "WFRF:(Kulis S.) srt2:(2010-2014)"

Sökning: WFRF:(Kulis S.) > (2010-2014)

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1.
  • Afanaciev, K.G., et al. (författare)
  • Investigation of the radiation hardness of GaAs sensors in an electron beam
  • 2012
  • Ingår i: Journal of Instrumentation. - 1748-0221. ; 7:11
  • Tidskriftsartikel (refereegranskat)abstract
    • A compact and finely grained sandwich calorimeter is designed to instrument the very forward region of a detector at a future e+e- collider. The calorimeter will be exposed to low energy e+e - pairs originating from beamstrahlung, resulting in absorbed doses of about one MGy per year. GaAs pad sensors interleaved with tungsten absorber plates are considered as an option for this calorimeter. Several Cr-doped GaAs sensor prototypes were produced and irradiated with 8.5-10 MeV electrons up to a dose of 1.5 MGy. The sensor performance was measured as a function of the absorbed dose.
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2.
  • De Gaspari, Massimiliano, et al. (författare)
  • Design of the analog front-end for the Timepix3 and Smallpix hybrid pixel detectors in 130 nm CMOS technology
  • 2014
  • Ingår i: Journal of Instrumentation. - 1748-0221. ; 9, s. Art. no. C01037-
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper describes a front-end for hybrid pixel readout chips, which was developed for the Timepix3 and Smallpix ASICs. The front-end contains a single-ended preamplifier with a structure for leakage current compensation which can handle both signal polarities, and a single-threshold discriminator with compensation for pixel-to-pixel mismatch. Preamplifier and discriminator are required to be fast, to allow a Time-Of-Arrival (TOA) measurement with a resolution of 1.56 ns. Time-Over-Threshold (TOT) is also measured; the monotonicity of TOT with respect to the input charge is greatly improved as compared to the previous Timepix chip. The analog area is only 55 μm × 13.5 μm. Timepix3 has already been fabricated and the first test results are also presented in this paper.
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