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A High Resolution, High Frame Rate Detector Based on a Microchannel Plate Readout With the Medipix2 Counting CMOS Pixel Chip

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6 Author(s)

The future of ground-based optical astronomy lies with advancements in adaptive optics (AO) to overcome the limitations that the atmosphere places on high resolution imaging. A key technology for AO systems on future very large telescopes are the wavefront sensors (WFS) which detect the optical phase error and send corrections to deformable mirrors. Telescopes with$≫$30 m diameters will require WFS detectors that have large pixel formats (512$times$512), low noise$(≪3 e^-/hboxpixel)$and very high frame rates ($sim$1 kHz). These requirements have led to the idea of a bare CMOS active pixel device (the Medipix2 chip) functioning in counting mode as an anode with noiseless readout for a microchannel plate (MCP) detector and at 1 kHz continuous frame rate. First measurement results obtained with this novel detector are presented both for UV photons and beta particles.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:52 ,  Issue: 4 )

Date of Publication:

Aug. 2005

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