"6" . "Horswell, I." . "Journal of Instrumentation" . "http://dx.doi.org/10.1088/1748-0221/6/01/C01031" . . "9"^^ . . . "X-ray photon-counting detectors consisting of a silicon pixel array sensor bump-bonded to a CMOS electronic readout chip offer several advantages over traditional X-ray detection technologies used for synchrotron applications. They offer high frame rate, dynamic range, count rate capability and signal-to-noise ratio. A survey of the requirements for future synchrotron detectors carried out at the Diamond Light Source synchrotron highlighted the needs for detectors with a pixel size of the order of 50 mu m. Reducing the pixel size leads to an increase of charge-sharing events between adjacent pixels and, therefore, to a degradation of the energy resolution and image quality of the detector. This effect was observed with MEDIPIX2, a photon-counting readout chip with a pixel size of 55 mu m. The lastest generation of the MEDIPIX family, MEDIPIX3, is designed to overcome this charge-sharing effect in an implemented readout operating mode referred to as Charge Summing Mode. MEDIPIX3 has the same pixel size as MEDIPIX2, but it is implemented in an 8-metal 0.13 mu m CMOS technology which enables increased functionality per pixel. The present work focuses on the study of the charge-sharing effect when the MEDIPIX3 is operated in Charge Summing Mode compared to the conventional readout mode, referred to as Single Pixel Mode. Tests of a standard silicon photodiode array bump-bonded to MEDIPIX3 were performed in beamline B16 at the Diamond Light Source synchrotron. A monochromatic micro-focused beam of 2.9 mu m x 2.2 mu m size at 15keV was used to scan a cluster of nine pixels in order to study the charge collection and X-ray count allocation process for each readout mode, Single Pixel Mode and Charge Summing Mode. The study showed that charge-shared events were eliminated when Medipix3 was operated in Charge Summing Mode."@en . . "233042" . . "PHOTON COUNTING MODE; READOUT CHIP WORKING; DIAMOND LIGHT-SOURCE; PIXEL; DETECTORS; PERFORMANCE; ENERGY; 3D"@en . . "Study of charge-sharing in MEDIPIX3 using a micro-focused synchrotron beam" . "Campbell, M." . "Ballabriga, R." . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "0" . . . . "Ture\u010Dek, Daniel" . "RIV/68407700:21670/11:00191135!RIV12-MSM-21670___" . "1748-0221" . . . "Study of charge-sharing in MEDIPIX3 using a micro-focused synchrotron beam"@en . "000291345600036" . "Sawhney, K.J.S." . "Study of charge-sharing in MEDIPIX3 using a micro-focused synchrotron beam"@en . "Marchal, J." . "21670" . "Tartoni, N." . . "X-ray photon-counting detectors consisting of a silicon pixel array sensor bump-bonded to a CMOS electronic readout chip offer several advantages over traditional X-ray detection technologies used for synchrotron applications. They offer high frame rate, dynamic range, count rate capability and signal-to-noise ratio. A survey of the requirements for future synchrotron detectors carried out at the Diamond Light Source synchrotron highlighted the needs for detectors with a pixel size of the order of 50 mu m. Reducing the pixel size leads to an increase of charge-sharing events between adjacent pixels and, therefore, to a degradation of the energy resolution and image quality of the detector. This effect was observed with MEDIPIX2, a photon-counting readout chip with a pixel size of 55 mu m. The lastest generation of the MEDIPIX family, MEDIPIX3, is designed to overcome this charge-sharing effect in an implemented readout operating mode referred to as Charge Summing Mode. MEDIPIX3 has the same pixel size as MEDIPIX2, but it is implemented in an 8-metal 0.13 mu m CMOS technology which enables increased functionality per pixel. The present work focuses on the study of the charge-sharing effect when the MEDIPIX3 is operated in Charge Summing Mode compared to the conventional readout mode, referred to as Single Pixel Mode. Tests of a standard silicon photodiode array bump-bonded to MEDIPIX3 were performed in beamline B16 at the Diamond Light Source synchrotron. A monochromatic micro-focused beam of 2.9 mu m x 2.2 mu m size at 15keV was used to scan a cluster of nine pixels in order to study the charge collection and X-ray count allocation process for each readout mode, Single Pixel Mode and Charge Summing Mode. The study showed that charge-shared events were eliminated when Medipix3 was operated in Charge Summing Mode." . "10.1088/1748-0221/6/01/C01031" . . "Llopart, X." . "Z(MSM6840770029)" . . . . . . "[60668615016A]" . "Gimenez, E. N." . "1"^^ . "8"^^ . . "RIV/68407700:21670/11:00191135" . . "Study of charge-sharing in MEDIPIX3 using a micro-focused synchrotron beam" . .