Photonic Device Modeling Using a Neural Network

65118 Photomultiplier tubes currently used in nuclear physics experiments are expensive, are unstable with respect to temperature, require high operating voltages, are sensitive to magnetic fields, and are bulky and fragile. This project will develop solid-state silicon photodiodes that will replace the currently used photomultiplier tubes in nuclear science gamma-ray spectroscopy. These new devices will offer lower cost, higher reliability, insensitivity to magnetic fields, lower noise, lower mass, and less power consumption compared with photomultiplier tubes. In Phase I, prototype silicon photodiodes will be designed, fabricated, and characterized with respect to their performance in response to x-rays, and in response to gamma-rays when coupled with scintillators. Characterization tests will be designed so that the resulting data is relevant to determining the applicability of these new devices to nuclear physics x- and gamma-ray spectroscopy Commercial Applications And Other Benefits as described by awardee: New x- and gamma-ray detectors should have applications in environmental remediation efforts, characterization of nuclear materials, astrophysics, and portable instruments for detecting of weapons grade materials at customs inspection points.