Microsystem for remote sensing of high energy radiation with associated extremely low photon flux densities

A. Otten; V. K. Jain

doi:10.1117/12.2191389

27 August 2015 Microsystem for remote sensing of high energy radiation with associated extremely low photon flux densities

A. Otten, V. K. Jain

Author Affiliations +

Proceedings Volume 9595, Radiation Detectors: Systems and Applications XVI; 959505 (2015) https://doi.org/10.1117/12.2191389
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

This paper presents a microsystem for remote sensing of high energy radiation in extremely low flux density conditions. With wide deployment in mind, potential applications range from nuclear non-proliferation, to hospital radiation-safety. The daunting challenge is the low level of photon flux densities – emerging from a Scintillation Crystal (SC) on to a ~1 mm-square detector, which are a factor of 10000 or so lower than those acceptable to recently reported photonic chips (including ‘single-photon detection’ chips), due to a combination of low Lux, small detector size, and short duration SC output pulses – on the order of 1 μs. These challenges are attempted to be overcome by the design of an innovative ‘System on a Chip’ type microchip, with high detector sensitivity, and effective coupling from the SC to the photodetector. The microchip houses a tiny n+ diff p-epi photodiode (PD) as well as the associated analog amplification and other related circuitry, all fabricated in 0.5micron, 3-metal 2-poly CMOS technology. The amplification, together with pulse-shaping of the photocurrent-induced voltage signal, is achieved through a tandem of two capacitively coupled, double-cascode amplifiers. Included in the paper are theoretical estimates and experimental results.

Citation Download Citation

A. Otten and V. K. Jain "Microsystem for remote sensing of high energy radiation with associated extremely low photon flux densities", Proc. SPIE 9595, Radiation Detectors: Systems and Applications XVI, 959505 (27 August 2015); https://doi.org/10.1117/12.2191389

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