Medipix3

Features

• High spatial, high contrast CMOS pixel readout chip
• Pixel readout: mitigates charge-sharing effect by allocation to the highest collecting charge pixel
• Single photon counting mode (noise suppresion, superior SNR)
• Direct X-ray conversion
• accepts +/- charge
• 2 thresholds, 2 12-bit counters per pixel
• 2 modes of operation: single pixel mode, charge summing mode (in either 55μm pixel configuration or in spectroscopic mode)
• simultaneous (continuous) read/write mode: 1 counter reads out, 1 counter counts (no deadtime) - not in conjunction with spectroscopic mode
• sequential read/write mode: 2 different thresholds
• spectroscopic mode: bonding of 1 chip to 4 pixels linked (110μm sensor matrix) providing larger pixels with 8 independent threshold levels and 8 counters
• noise per pixel: ~60e- RMS (single pixel mode)
• noise per pixel: ~130e- RMS (charge summing mode)
• more radiation-hard than Medipix2, due to CMOS technology

Parameters

• pixel size: 55μm
• CMOS technology: 0.13μm
• count rate per pixel: 300KHz
• active area: 2cm^2
• 256x256 pixel matrix

Applications (projected)

• Multi-spectral X-ray imaging
• synchrotron light sources
• able to operate in any application that currently employs Medipix2
• CT scanners

-- SotirisFragkiskos - 07-Sep-2011