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Wasi Faruqi
Direct Detection in Silicon : Hybrid Pixel Detector : Medipix2

A semiconductor such as silicon is capable of detecting electrons (and other radiation) very efficiently by the mechanism of electron-hole creation. Provided the newly created electrons can be collected and the resulting signal amplified by low noise electronics, it is possible to use the silicon as an electron detector. A huge effort by the particle physics community has resulted in the evolution of several types of silicon detectors with positional sensitivity for use at the new Large Hadron Collider at CERN. In collaboration with the Medipix group, based at CERN, we have evaluated the properties of a hybrid pixel detector, Medipix2, for use in electron microscopy.

Medipix image 1Medipix image 2
Medipix image 3

Publications related to Medipix work

  1. Prospects for Hybrid Pixel Detectors in Electron Microscopy
    Nucl.Instr. and Meth. 466, 146-154, (2001).

  2. Evaluation of a Hybrid Pixel Detector for Electron Microscopy
    A.R.Faruqi, D.M.Cattermole, R.Henderson, B.Mikulec and C.Raeburn
    Ultramicroscopy, 94, 263-276, (2003).

  3. Applications of Pixel Detectors to Electron Microscopy
    A.R.Faruqi, D.M.Cattermole and C.Raeburn
    Nucl.Instr. and Meth. 513, 317-321, (2003).

  4. Noiseless Direct Detection of Electrons in Medipix2 for Electron Microscopy.
    A.R.Faruqi, R.Henderson and L.Tlustos
    Nucl.Instr. and Meth, 546, 160-163, (2005).

  5. Electron Imaging with Medipix2 Hybrid Pixel Detector
    G.McMullan, D.M.Cattermole, S.Chen, R.Henderson, X.Llopart, C.Summerfield, L.Tlustos and A.R.Faruqi
    Ultramicroscopy, 107, (2007), 401-413.

  6. Electron microscope imaging of single particles using the  Medipix2 detector
    G. McMullan, A. R. Faruqi
    Nucl Instr. and Meth., A591 (2008), 129-133.

  7. Images of paraffin monolayer crystals with perfect contrast: Minimization of beam-induced specimen motion
    R.M. Glaeser, G.McMullan, A.R.Faruqi, R.Henderson
    Ultramicroscopy 111 (2011), 90 - 100.

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