Assessment of Present and Future Large-Scale Semiconductor Detector Systems

Spieler, H.; Häller, E. E.

doi:10.1109/tns.1985.4336867

Cited by 30 publications

(11 citation statements)

References 27 publications

(20 reference statements)

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“…Therefore, the results of measurement with the Timepix device are also valid for the Medipix2. The two important conclusions of the experimental studies were that the charge spread can be described with a 2D Gaussian distribution [14], which was in fact just a con¿rmation of theory [15] and other experimental evaluations [10]. The second important conclusion was that the width of the Gaussian, and therefore also the cluster 1 size, as discussed in [12], was changing almost linearly with the depth of photon interaction.…”

Section: Charge Sharingmentioning

confidence: 60%

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X-ray fluorescence imaging with the Medipix2 single-photon counting detector

Uher

Harvey

Jakůbek

2010

IEEE Nuclear Science Symposuim &Amp; Medical Imaging Conference

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Abstract-Material-resolved X-ray imaging or colour X-ray imaging is of a great interest for many applications ranging from physics, industry to medicine and biology. X-ray Àuorescence offers a method for producing such images if the energies and positions of origin of the Àuorescent photons can be adequately resolved.This paper describes application of the Medipix2 single photon counting imaging detector (256 256 pixels each of 55 55 m size) for this purpose.The basics of the method are explained including details of the energy calibration of all 65 k individual pixels. The effect of charge sharing is discussed and a method for its characterisation based on numerical calculation presented. The charge sharing calculation is then used to generate the Medipix2 detector response matrix, which is subsequently used for analysis of measured spectra in detector pixels.

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Section: Charge Sharingmentioning

confidence: 60%

“…The charge collection in a pixelated silicon sensor was extensively studied with the Timepix detector [12], [13], [15]. The Timepix detector is a descendant of the Medipix2 device.…”

Section: Charge Sharingmentioning

confidence: 99%

X-ray fluorescence imaging with the Medipix2 single-photon counting detector

Uher

Harvey

Jakůbek

2010

IEEE Nuclear Science Symposuim &Amp; Medical Imaging Conference

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“…This indicates that working in over-depletion mode reduces charge sharing [114], [115]. Going below full depletion (17 V detector bias), the SNR decreased to ~19.…”

Section: Systematic Pixel-to-pixel Variationsmentioning

confidence: 98%

Development of segmented semiconductor arrays for quantum imaging

Mikulec

2003

Nuclear Instruments and Methods in Physics Research Section A:

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The field of pixel detectors has grown strongly in recent years through progress in CMOS technology, which permits many hundreds of transistors to be implemented in a square area with a side of 50- This paper gives an introduction into the concept of quantum imaging using direct conversion in segmented semiconductor arrays. An overview of projects from this domain using strip, pad and in particular hybrid pixel detectors will be presented. One of these projects, the Medipix project, is described in more detail. The effect of different correction methods like threshold adjustment and flat field correction is illustrated and new measurement results and images presented.

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“…5). The transverse diffusion of drifting charge carriers was modelled by projecting released charge carriers to the pixel electrode plane using a probability density function whose width depended on the point of generation of each free charge carrier [9]. Additionally, Coulomb repulsion in the charge carrier cloud was taken into account by an enlarged effective diffusion constant.…”

Section: Simulationmentioning

confidence: 99%