The overall technical goal of this program, to study the science and technology needed to develop very large area, rugged, high sensitivity, and low power, pixilated, thermal neutron detectors addresses categories 1 and 2 in the Program Description. Very large area detector systems, meters on a side, provide the large aperture needed to quickly scan large containers with high sensitivity. The final goal is to demonstrate a prototype device that incorporates all of the developed technologies. This project builds on our recent work where we demonstrated flexible active matrix backplane electronics and rudimentary amplifiers. There are three technology areas that will be addressed to meet the goals; 1) the neutron conversion layer, 2) the charged particle detection layer, and 3) the high sensitivity active matrix pixel electronics for low parasitic capacitance detection and signal amplification to allow large arrays. For each of the three technologies there are multiple approaches we will pursue to provide both performance and reliability. For the neutron conversion layer our first approach is to evaluate nanoparticles containing 10B and/or 6Li dispersed in a polymer-based matrix in contact with a thin-film sensor (converter-on-diode). Our longer term approach is to evaluate nanoparticles containing 10B and/or 6Li dispersed in a solution processable semiconductor diode (converter-indiode). For the charged particle detection system we will start by developing a fundamental understanding for the current generation and collection in polycarbonate and P3HT organic diodes induced by charged particles. We will also determine the impact of doping the polycarbonate with a semiconductor. To maximize sensitivity while maintaining selectivity we will develop high sensitivity pixel electronics, which will require very low noise amplifiers. We will evaluate new amplifier designs based on thin-film transistors. A significant goal of this project will be developing models to simulate device performance, as well as system performance to evaluate system sensitivity for different detection scenarios.
|Effective start/end date||9/1/12 → 9/30/13|
- US Department of Homeland Security (DHS): $89,399.00