Woodruff School of Mechanical Engineering
NRE 8011/8012 and MP 6011/6012 Seminar
Nuclear & Radiological Engineering and Medical Physics Programs
Advanced Sensors for Nuclear Radiation Detection
Dr. Ge Yang
Assistant Professor- Department of Nuclear Engineering, North Carolina State University
Thursday, October 11, 2018 at 11:00:00 AM
Boggs Building, Room 3-47
Compound semiconductor radiation sensors have attracted a sustained research interest due to their great potential for room-temperature X-ray and gamma-ray detection. These detectors are able to deliver excellent energy-resolution and high detection-efficiency while operating at room temperature. These advantages create great opportunities to use such detectors in a wide range of applications including nonproliferation inspections, nuclear-medical imaging, industrial process monitoring, astronomical phenomenon observations, environmental safety and remediation, and basic physics investigations. Central to the movement of compound semiconductor nuclear sensor technologies have been the development of sensor materials and advanced sensor designs. In this seminar I will focus on several important factors that substantially affect the performance of compound semiconductor sensors and discuss the corresponding solutions to address these challenges. I will present and analyze the test data from a series of characterization experiments and examine their correlation with the integrated device performance. Furthermore the post-growth annealing approach will be introduced, which is a promising method to reduce the effects of material defects and could largely improve the performance of sensor materials. Meanwhile I will also report the latest progress of other types of emerging radiation detector materials currently developed in the Radiation Detector Materials and Devices Group at NC State University.
Dr. Yang received his B.S. (2001), M.S. (2004) and Ph.D. (2007) in materials science and engineering from Northwestern Polytechnical University. Prior to joining the NC State faculty, he spent ten years at U.S. Department of Energy Brookhaven National Laboratory (BNL), working in Radiation Detectors and Nonproliferation R&D Group. During the period, he has been promoted through the ranks (Research Associate, Assistant Scientist, Associate Scientist and Scientist) because of his outstanding performance. Dr. Yangs research has yielded 7 patents, 133 publications in top-ranked scientific journals and conference proceedings, and numerous invited presentations at various professional conferences. He is a two-time recipient of the prestigious R&D 100 Award, in 2009 and 2014, together with his collaborators for developing various compact sensors to detect and image radiation. He is also the co-Finalist of 2017 R&D 100 Award for developing novel electrode material for radiation detectors. Dr. Yangs research interests have revolved around the opportunities at the intersection of nuclear engineering, materials science and engineering and electrical engineering. Special emphasis is placed on developing new materials and devices for improving radiation detection and imaging technologies, which are widely needed in nonproliferation, nuclear security, medical imaging, industrial process monitoring, environmental safety survey and remediation, astronomical observation instrumentation and high energy physics R&D. Dr. Yang is also interested in investigating radiation effects in electronic, optical and structural materials and developing radiation-resistant materials. All of these topics are investigated using both theory and experimental techniques.
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