Résumé du preprint DAPNIA-07-207

DAPNIA-07-207
Development of Binary Readout CMOS Monolithic Sensors for MIP Tracking
Y.Degerli, A.Besson, G.Claus, M.Combet, A.Dorokhov, W.Dulinski, M.Goffe, A.Himmi, Y.Li, and F.Orsini
Recently, CMOS Monolithic Active Pixels Sensors (MAPS) have become 
strong candidates for pixel detectors used in high energy physics 
experiments. A very good spatial resolution can be obtained with 
these detectors (lower than 5 microns). A recent fast MAPS chip, 
designed on AMS CMOS 0.35 m Opto process and called MIMOSA16 (HiMAPS2), 
was submitted to foundry in June 2006. The pixel array is addressed row-wise. 
The chip is a 128 x 32 pixels array where 8 columns have analog test 
outputs and 24 have their outputs connected to offset compensated 
discriminator stages. The array is divided in four blocks of pixels with 
different conversion factors and is controlled by a serially programmable 
sequencer. Discriminators have a common adjustable threshold. The 
sequencer operates as a pattern generator which delivers control signals 
both to the pixels and to the column-level discriminators. This chip is the 
basis of the final sensor of the EUDET-JRA1 beam telescope which will be 
installed at DESY in 2009. In this paper, laboratory tests results using a 
55Fe source together with beam tests results made at CERN using 
Minimum Ionizing Particles (MIPs) are presented.

 

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