Photon detection
Single Photon Counting Pixel Detectors
Direct Conversion — CERN Medipix Technology
- Pixel Size
- 55µm × 55µm (Medipix2/3), 75µm × 75µm (Medipix4)
- Pixel Matrix
- 256 × 256 (Medipix2/3), 512 × 448 (Medipix4)
- Sensitive Area
- 1.4 × 1.4 cm (single chip), up to 6.93 cm² (Medipix4)
Overview
Technical record / 0015
The Medipix family of hybrid pixel detectors is developed by an international collaboration led by designers at CERN. Originally invented for pattern recognition in particle tracing at the LHC, this technology has evolved into a versatile platform for single photon counting across multiple application domains.
Multiple chip generations are available: Medipix2 (256×256 pixels, 55µm pixel size, 1MHz counting rate), Medipix3 (charge summing mode for color imaging), and Timepix3 (simultaneous ToA and ToT measurement with 10ns time binning). All chips are 3-side buttable for tiling into larger arrays.
What Sets This Product Apart
Technical Details
- Pixel Size
- 55µm × 55µm (Medipix2/3), 75µm × 75µm (Medipix4)
- Pixel Matrix
- 256 × 256 (Medipix2/3), 512 × 448 (Medipix4)
- Sensitive Area
- 1.4 × 1.4 cm (single chip), up to 6.93 cm² (Medipix4)
- Energy Range
- From 3 keV upwards
- Maximum Count Rate
- 1 MHz (Medipix2), 826 Mcounts/mm²/s (Medipix3)
- Imaging Rate
- Up to 20 frames per second (continuous read/write)
- CMOS Technology
- 0.13 µm (Medipix3), 65 nm (Medipix4)
- Energy Resolution
- ~2.5 keV FWHM (CdTe, CSM, 60 keV)
- Power Consumption
- 440 mW analog + 450 mW digital (@100 MHz)
- Threshold Adjustment
- 5-bit local adjustment per pixel, 35 e- rms after tuning
Where It Excels
- 01Medical X-ray and gamma-ray imaging
- 02Non-destructive testing and material analysis
- 03Color radiography and spectral imaging
- 04Neutron imaging and diffraction analysis
- 05Space radiation detection and astrophysics
- 06Security scanning and radiation safety monitoring
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