Charge sharing in silicon pixel detectors

K Mathieson, MS Passmore, P Seller, ML Prydderch, V O'Shea, RL Bates, KM Smith, M Rahman

Research output: Contribution to journalArticle

41 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)113-122
Number of pages10
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume487
Issue number1-2
DOIs
Publication statusPublished - 11 Jul 2002

Fingerprint

Pixels
pixels
Detectors
X rays
Silicon
detectors
silicon
x rays
energy
Full width at half maximum
Charge transfer
Electronic equipment
computer programs
thresholds
room temperature
electronics
simulation
interactions
Temperature

Keywords

  • photonics
  • pixel detectors
  • silicon

Cite this

Mathieson, K ; Passmore, MS ; Seller, P ; Prydderch, ML ; O'Shea, V ; Bates, RL ; Smith, KM ; Rahman, M. / Charge sharing in silicon pixel detectors. In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2002 ; Vol. 487, No. 1-2. pp. 113-122.
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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.",
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Charge sharing in silicon pixel detectors. / Mathieson, K; Passmore, MS; Seller, P; Prydderch, ML; O'Shea, V; Bates, RL; Smith, KM; Rahman, M.

In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 487, No. 1-2, 11.07.2002, p. 113-122.

Research output: Contribution to journalArticle

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T1 - Charge sharing in silicon pixel detectors

AU - Mathieson, K

AU - Passmore, MS

AU - Seller, P

AU - Prydderch, ML

AU - O'Shea, V

AU - Bates, RL

AU - Smith, KM

AU - Rahman, M

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N2 - 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.

AB - 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.

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KW - pixel detectors

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