DEPMOS arrays for x-ray imaging

Gerhard Lutz; Rainer H. Richter; Lothar Strueder

doi:10.1117/12.391560

18 July 2000 DEPMOS arrays for x-ray imaging

Gerhard Lutz, Rainer H. Richter, Lothar Strueder

Proceedings Volume 4012, X-Ray Optics, Instruments, and Missions III; (2000) https://doi.org/10.1117/12.391560
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

For future x-ray satellite missions and other applications we propose a novel sensor which is based on the `DEPleted Field Effect Transistor (DEPFET)'. MOS-type DEPFETs (DEPMOS) are employed in prototype designs of pixel detectors ready for production. The device operated on a fully depleted silicon wafer allows an internal charge amplification directly above the position where the signal conversion takes place. A very low gate capacitance of the DEPMOS transistor leads to low noise amplification. In contrast to CCDs neither transfer loss nor `out of time events' can occur in a DEPFET-array. Fast imaging and low power consumption can be achieved by a row by row selection mode. The signal charge stored in a potential minimum below the transistor channel can be read out non destructively and repeatedly. By shifting the charge between two neighboring DEPMOS amplifiers the repeated signal readout leads to significant noise reduction. Concept, design and device simulations are presented and consequences of the expected properties for applications in x-ray imaging are discussed.

Citation Download Citation

Gerhard Lutz, Rainer H. Richter, and Lothar Strueder "DEPMOS arrays for x-ray imaging", Proc. SPIE 4012, X-Ray Optics, Instruments, and Missions III, (18 July 2000); https://doi.org/10.1117/12.391560

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