Charge sharing in silicon pixel detectors

Mathieson, K and Passmore, MS and Seller, P and Prydderch, ML and O'Shea, V and Bates, RL and Smith, KM and Rahman, M (2002) Charge sharing in silicon pixel detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 487 (1-2). pp. 113-122. ISSN 0168-9002 (https://doi.org/10.1016/S0168-9002(02)00954-3)

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Abstract

We used a pixellated hybrid silicon X-ray detector to study the effect of the sharing of generated charge between neighbouring pixels over a range of incident X-ray energies, 13–36 keV. The system is a room temperature, energy resolving detector with a Gaussian FWHM of 265 eV at 5.9 keV. Each pixel is 300 μm square, 300 μm deep and is bump bonded to matching read out electronics. The modelling packages MEDICI and MCNP were used to model the complete X-ray interaction and the subsequent charge transport. Using this software a model is developed which reproduces well the experimental results. The simulations are then altered to explore smaller pixel sizes and different X-ray energies. Charge sharing was observed experimentally to be 2% at 13 keV rising to 4.5% at 36 keV, for an energy threshold of 4 keV. The models predict that up to 50% of charge may be lost to the neighbouring pixels, for an X-ray energy of 36 keV, when the pixel size is reduced to 55 μm.

ORCID iDs

Mathieson, K ORCID logoORCID: https://orcid.org/0000-0002-9517-8076, Passmore, MS, Seller, P, Prydderch, ML, O'Shea, V, Bates, RL, Smith, KM and Rahman, M;
  • Item type:Article
    ID code:37540
    Dates:
    Date
    Event
    11 July 2002
    Published
    Notes:3rd International Workshop on Radiation Imaging Detectors, OROSEI, ITALY, SEP 23-27, 2001
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:09 Feb 2012 15:59
    Last modified:11 Nov 2024 10:04
    URI:https://strathprints.strath.ac.uk/id/eprint/37540
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