Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2005 · 17 citations · 12 references
EngineeringBiomedical EngineeringElectrical EngineeringDiagnostic ImagingRadiation DetectionSensorsAdaptive OpticsDetector TechnologyImagingRadiation Imaging DetectorsX-ray DetectionX-ray DetectorsCmos Image SensorsDetector Readout ElectronicsDetectorsMicrochannel Plate DetectorsMicrochannel Plate ReadoutMicrochannel PlatesPhotocathodesPixel Architecture
A new hybrid imaging detector is described that is being developed for the next generation adaptive optics (AO) wavefront sensors. The detector consists of proximity focused microchannel plates (MCPs) read out by pixelated CMOS application specific integrated circuit (ASIC) chips developed at CERN ("Medipix2"). Each Medipix2 pixel has an amplifier, lower and upper charge discriminators, and a 14-bit counter. The 256×256 array can be read out noiselessly (photon counting) in 286 μs. The Medipix2 is abutable on 3 sides to produce 512× (<i>n</i>*256) pixel devices. The readout can be electronically shuttered down to a temporal window of a few microseconds with an accuracy of 10 ns. Good quantum efficiencies can be achieved from the x-ray (open faced with opaque photocathodes) to the optical (sealed tube with semi-transparent GaAs photocathode).
12
An interface board for the control and data acquisition of the Medipix2 chip
David San Segundo Bello, M. van Beuzekom, P. Jansweijer et al. · Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · 2003 · 101 citations
Engineering, Biomedical Engineering, Computer Engineering +16
High resolution cross strip anodes for photon counting detectors
Oswald H. W. Siegmund, Anton S. Tremsin, John V. Vallerga et al. · Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · 2003 · 44 citations
Engineering, Electrical Engineering, Electronic Materials +13