A5047683776- Molten salt chemistry and electrochemical processes
- Quantum and electron transport phenomena
- Theoretical and Computational Physics
- Physics of Superconductivity and Magnetism
- Inorganic Fluorides and Related Compounds
- Rare-earth and actinide compounds
- Nanoporous metals and alloys
- Electron and X-Ray Spectroscopy Techniques
- Spectral Theory in Mathematical Physics
- Nuclear Materials and Properties
- Machine Learning in Materials Science
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Condensed Matter Physics
- Magnetic Properties of Alloys
- Advanced Materials Characterization Techniques
- Nuclear and radioactivity studies
- Iron-based superconductors research
- Quantum many-body systems
- Advanced Thermodynamics and Statistical Mechanics
- Nuclear reactor physics and engineering
- Metallurgical Processes and Thermodynamics
- Quantum Mechanics and Applications
- Radiation Shielding Materials Analysis
- X-ray Diffraction in Crystallography
- Nuclear Physics and Applications
Massachusetts Institute of Technology
2022-2025
University of Missouri
2021-2023
The use of molten salts as coolants, fuels, and tritium breeding blankets in the next generation fission fusion nuclear reactors benefits from furthering characterization molecular structure halide salts, paving way to predictive capability chemical thermophysical properties salts. Due its neutronic, chemical, thermochemical properties, 2<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><a:mrow><a:mi>Li</a:mi><a:mi...
Molten fluoride salts such as Li 2 BeF 4 (FLiBe) are used in molten salt reactors, fluoride-salt-cooled high-temperature reactors and fusion a fuel solvent, coolant and/or tritium breeding medium. In engineered systems that use salt, solid-state material will be present during melting freezing scenarios, therefore the temperature-dependent properties of solid solid/liquid phase transition merit investigation. To observe behavior state from room temperature to melting, this work neutron X-ray...
Abstract We present computer simulations on a class of percolative systems that forms new universality class. determine the universal critical exponents for this from lattices consisting up to one billion sites. These differ standard in once cluster breaks off lattice spanning cluster, its sites become protected and cannot be removed. demonstrate despite restriction evolution isolated clusters, scaling relationships between remain valid. Protected percolation closely mimics situation...
Understanding and controlling the chemical processes between molten salts alloys is vital for safe operation of molten-salt nuclear reactors. Corrosion in are highly dependent on redox potential solution that changes with presence fission corrosion processes, as such, reactor designers develop electrochemical methods to monitor salt. However, techniques rely deconvolution broad peaks, a process may be imprecise multiple species emerge during operation. Here, we describe situ measurements...
Systems that have been prepared to undergo a second-order phase transition at zero Kelvin, the so-called quantum critical systems, appear fall into two categories: (chemically) heavily doped systems where unusual properties can be related disorder-induced distribution of Kondo shielding temperatures, and (almost) stoichiometric departures from Fermi-liquid theory attributed intrinsic instabilities. Here we show this distinction is not as clear-cut magnetic clusters associated with...
Metallic Kondo Lattice systems that have been prepared to exhibit a competition between ordering of magnetic moments and shielding those by the conduction electrons down absolute zero display unusual low-temperature responses. Here we show dominant response such is caused two quantum effects: zero-point motion ions, size system restricting allowed wavelengths fluctuations. This ions induces broad distribution in temperatures renders assumption uniform heavy-fermion ground state untenable....
We present the results of computer simulations on a class percolative systems, called protected percolation, that violates Harris criterion. The criterion states whether critical behavior at phase transition from disordered state to an ordered will be altered by impurities. incorporate impurities into our test exponents for percolation are find three-dimensional indeed change with in form missing sites and immortal sites. On other hand, both standard two dimensions stable against
Understanding and controlling the physical chemical processes at molten salt‐alloy interfaces is vital for molten‐salt nuclear reactors. Corrosion in salts are highly dependent on redox potential of solution that changes with addition fission corrosion products. Therefore, reactor designers develop online electrochemical methods salt monitoring. But spectroscopy relies deconvolution broad peaks, a process may be imprecise presence multiple species solution. Here, we describe our developments...
Metallic Kondo Lattice systems that have been prepared to exhibit a competition between ordering of magnetic moments and shielding those by the conduction electrons down absolute zero display unusual low-temperature responses. Here we show dominant response such is caused two quantum effects: zero-point motion ions, size system restricting allowed wavelengths fluctuations. This ions induces broad distribution in temperatures renders assumption uniform heavy-fermion ground state untenable....
The use of molten salts as coolants, fuels, and tritium breeding blankets in the next generation fission fusion nuclear reactors benefits from furthering characterization molecular structure halide salts, paving way to predictive capability chemical thermo-physical properties salts. Due its neutronic, chemical, thermo-chemical properties, 2LiF−BeF2 is a candidate salt for several reactor designs. We perform neutron X-ray total scattering measurements determine atomic 2LiF−BeF2. also...
Effects of corrosion products on molten salt properties are a focus many studies motivated by the needs molten-salt nuclear reactors. We demonstrate in-situ measurements from NiCr (80%-20%) foil in FLiNaK. used X-ray absorption spectroscopy (XAS) and combination XAS with electrochemical spectroscopy. Using XAS, we measured both space time distributions Ni Cr ions leaching characterized their valence state local structure. also correlated results simultaneous measurements. demonstrated novel...