NDLI: A CMOS active pixel sensor for charged particle detection

Content Provider	IEEE Xplore Digital Library
Author	Matis, H.S. Bieser, F. Kleinfelder, S. Rai, G. Retlere, F. Hans Titter, G. Samuel, K.S. Wurzel, E. Wieman, H. Yamamoto, E.
Copyright Year	2003
Description	Author affiliation: Lawrence Berkeley Nat. Lab., CA, USA (Matis, H.S.)
Abstract	Active Pixel Sensor (APS) technology has shown promise for next-generation vertex detectors. This paper discusses the design and testing of two generations of APS chips. Both are arrays of 128 by 128 pixels, each 20 by 20 /spl mu/m. Each array is divided into sub-arrays in which different sensor structures (4 in the first version and 16 in the second) and/or readout circuits are employed. Measurements of several of these structures under Fe/sup 55/ exposure are reported. The sensors have also been irradiated by 55 MeV protons to test for radiation damage. The radiation increased the noise and reduced the signal. The noise can be explained by shot noise from the increased leakage current and the reduction in signal is due to charge being trapped in the epi layer. Nevertheless, the radiation effect is small for the expected exposures at RHIC and RHIC II. Finally, we describe our concept for mechanically supporting a thin silicon wafer in an actual detector.
Starting Page	259
Ending Page	263
File Size	2118269
Page Count	5
File Format	PDF
ISBN	0780376366
DOI	10.1109/NSSMIC.2002.1239312
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Noise reduction Circuit noise Circuit testing CMOS technology Detectors Semiconductor device measurement Iron Protons Leakage current
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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