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Proceedings Paper

Measurements of Si hybrid CMOS x-ray detector characteristics
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Paper Abstract

The recent development of active pixel sensors as X-Ray focal plane arrays will place them in contention with CCDs on future satellite missions. Penn State University (PSU) is working with Teledyne Imaging Sensors (TIS) to develop X-Ray Hybrid CMOS devices (HCDs), a type of active pixel sensor with fast frame rates, adaptable readout timing and geometry, low power consumption, and inherent radiation hardness. CCDs have been used with great success on the current generation of X-Ray telescopes (e.g. Chandra, XMM, Suzaku, and Swift). However, their bucket-brigade readout architecture, which transfers charge across the chip with discrete component readout electronics, results in clockrate limited readout speeds that cause pileup (saturation) of bright sources and an inherent susceptibility to radiation induced displacement damage that limits mission lifetime. In contrast, HCDs read pixels through the detector substrate with low power, on-chip readout integrated circuits. Faster frame rates, achieved with adaptable readout timing and geometry, will allow the next generation's larger effective area telescopes to observe brighter sources free of pileup. In HCDs, radiation damaged lattice sites affect a single pixel instead of an entire row. The PSU X-ray group is currently testing 4 Teledyne HCDs, with low cross-talk CTIA devices in development. We will report laboratory measurements of HCD readnoise, interpixel-capacitance and its impact on event selection, linearity, and energy resolution as a function of energy.

Paper Details

Date Published: 16 July 2010
PDF: 10 pages
Proc. SPIE 7742, High Energy, Optical, and Infrared Detectors for Astronomy IV, 77420R (16 July 2010); doi: 10.1117/12.856718
Show Author Affiliations
Stephen D. Bongiorno, The Pennsylvania State Univ. (United States)
Abraham D. Falcone, The Pennsylvania State Univ. (United States)
David N. Burrows, The Pennsylvania State Univ. (United States)
Robert Cook, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 7742:
High Energy, Optical, and Infrared Detectors for Astronomy IV
Andrew D. Holland; David A. Dorn, Editor(s)

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