He has more than 25 years of experience in X-ray powder diffraction. His research focuses on in-situ and high-resolution structural studies on a variety of materials, including polycrystalline thin films, carbon nanotubes, zeolitic catalysts, organic molecular compounds, battery materials, organic-inorganic hybrids and ancient materials. His expertise includes X-ray detectors, diffraction software, and beamline optics hardware. Prior to joining Brookhaven National Laboratory, he worked at the European Synchrotron Radiation Facility (ESRF-France) on developing the benchmark High Resolution Powder Diffraction beamline. He received both his master’s degree in hard condensed matter physics and crystallography and doctorate in radiation physics from the University of Paris.
He is a staff research scientist working in the Nuclear System Design and Analysis Division at Idaho National Laboratory (INL). He has expertise in heat transfer, fluid mechanics, thermal design, thermodynamics and nuclear safety analyses. Over the last few years, he has been researching high temperature heat exchanger design and optimization, system integration and power conversion systems, and safety and reliability for Advanced Reactor Concepts, and also has extensive experience in the design and construction of large-scale experimental systems for nuclear and thermal-hydraulic research. He has more than 12 years of research and development experience in nuclear/thermal engineering and has been involved in several academic, industrial, and cross-discipline national laboratory research projects. He is currently working to develop a new multi-loop, multi-fluid advanced test facility designed to examine thermal hydraulic and materials issues associated with advanced nuclear reactor technologies. He has authored two books; contributed chapters to technical books on advanced reactors, thermal systems and process heat transfer; published over 100 peer-reviewed publications; and served as the INL lead for numerous partnerships. He holds an adjunct faculty appointment in the Department of Mechanical, Aerospace, and Nuclear Engineering at Rensselaer Polytechnic Institute. He obtained his bachelor’s in mechanical engineering with concentration in robotics and controls from Wilkes University in Pennsylvania, a master’s degree in nuclear engineering with a minor in mechanical engineering from Oregon State University, a master’s degree in engineering management from University of Idaho, and doctorate in nuclear engineering from University of Idaho.
His expertise in the solar area is focused on photovoltaic module reliability with emphasis on testing for water ingress and lifetime service prediction. Experimental capabilities in our group, includes sample fabrication in clean room facilities, spectroscopic characterization of water content up to module sized samples in near and mid infrared, and direct determination of water in polymers with Karl Fisher oven drying titration. Modelling capabilities in our group, include numerical simulation of diffusion in polymeric material, ray-tracing modelling through complex structures (including non-linear absorbance, scattering, and optimization), and ab initio simulations of interaction of water with polymers. Our group has been collaborating with solar industry partners to assess water ingress in solar modules as part of product development cycle.
He has more than 10 years of industrial and research experience in automation, instrumentation, and control. He holds a doctorate in nuclear engineering from Texas A&M University, a master’s degree in information technology and automation systems from Esslingen University of Applied Science in Germany, and a bachelor’s degree in mechanical engineering from Jordan University of Science and Technology in Jordan. In 2015, he joined Idaho National Laboratory as a research and development scientist with special focus on nuclear automation, instrumentation, and control. Before earning his doctorate, he worked at Asea Brown Boveri for 6 years and was a lead distributed control systems engineer by 2010. While pursuing his degree, he researched various nuclear engineering topics at Texas A&M University and worked for a year at the International Atomic Energy Agency (IAEA). He also worked for Daimler Chrysler-Mercedes Group and Fraunhofer Institute for Production and Automation in Germany. He is a senior Institute of Electrical and Electronics Engineers (IEEE) member and author of several publications and technical reports. He is also a reviewer of nuclear energy and IEEE journals and U.S. Department of Energy grants.
He is a directorate fellow and department manager at Idaho National Laboratory and dedicated to conducting radiation effects research, leading to the development of radiation tolerant materials, for 25 years. Throughout his career, he has demonstrated a successful multidisciplinary approach, involving extensive experimental investigations, exhaustive post-irradiation microstructural characterization, and theoretical modeling. He has extensive experience using multiple techniques, such as light ions, heavy ions, in-situ ion irradiation/microscopy, and neutron irradiation to conduct research focused on the relationships between radiation damage, material microstructure, and material performance on a broad range of reactor structural materials and nuclear fuels. In addition to this effective multidisciplinary approach, he is a recognized international expert in the nanoscale characterization of irradiated fuels and materials using transmission electron microscopy (TEM) methods. His important contributions include the evaluation of radiation effects in advanced carbide and nitride candidate materials for the Generation IV gas-cooled fast reactor program; characterization of the fission gas superlattice bubbles in irradiated U-Mo fuel; work as a principal investigator on a project that helped scientists to understand the role of irradiated defect development on thermal conductivity degradation in UO2; and evaluation of the radiation stability of advanced oxide dispersion strengthened alloys using ion irradiation that revealed the superior radiation performance of these alloys to high radiation dose. He also leads a team of researchers at Idaho National Laboratory and Brookhaven National Laboratory conducting research under a U.S. Department of Energy Basic Energy Sciences project he initiated on gas bubble self-organization.
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