A5064400631- Magnetic confinement fusion research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Ionosphere and magnetosphere dynamics
- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Catalysis and Hydrodesulfurization Studies
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Solar and Space Plasma Dynamics
- Mesoporous Materials and Catalysis
- Plasma Diagnostics and Applications
- Crystallography and molecular interactions
- Nuclear Physics and Applications
- Concrete and Cement Materials Research
- Magnetism in coordination complexes
- Dust and Plasma Wave Phenomena
- Catalytic Processes in Materials Science
- Chemical Synthesis and Reactions
- Advanced Photocatalysis Techniques
- Lanthanide and Transition Metal Complexes
- Luminescence Properties of Advanced Materials
- Advanced Nanomaterials in Catalysis
General Atomics (United States)
2018-2025
Zhoukou Normal University
2012-2024
Chongqing University of Posts and Telecommunications
2024
Hunan University
2024
Wuhan University of Technology
2013-2022
University of California, Irvine
2017-2021
The Graduate University for Advanced Studies, SOKENDAI
2012-2017
National Institute for Fusion Science
2016-2017
Zhoukou City Academy of Agricultural Sciences
2015-2016
Xi'an Polytechnic University
2014
DIII-D experiments at low density (n_{e}∼10^{19} m^{-3}) have directly measured whistler waves in the 100-200 MHz range excited by multi-MeV runaway electrons. Whistler activity is correlated with intensity (hard x-ray emission level), occurs novel discrete frequency bands, and exhibits nonlinear limit-cycle-like behavior. The frequencies scale magnetic field strength electron as expected from dispersion relation. modes are stabilized increasing field, which consistent wave-particle...
Gyrokinetic simulations of the fishbone instability in DIII-D tokamak plasmas find that self-generated zonal flows can dominate nonlinear saturation by preventing coherent structures from persisting or drifting energetic particle phase space when mode frequency down-chirps. Results simulation with agree quantitatively, for first time, experimental measurements amplitude and transport. Moreover, fishbone-induced are likely responsible formation an internal transport barrier was observed after...
Abstract Negative triangularity (NT) is a potentially transformative configuration for tokamak-based fusion energy with its high-performance core, edge localized mode (ELM)-free edge, and low-field-side divertors that could readily scale to an integrated reactor solution. Previous NT work on the TCV DIII-D tokamaks motivated installation of graphite-tile armor lower outer wall DIII-D. A dedicated multiple-week experimental campaign was conducted qualify scenario future reactors. During...
Fe2O3 is a promising semiconductor for photoelectrochemical (PEC) water decomposition. However, severe charge recombination problems limit its applications. In this study, F–Fe2O3–x/MoS2 nanorod array photoanode was designed and prepared to facilitate separation. Detailed characterization experimental results showed that F doping in regulated the electronic structure improve conductivity of induced abundant oxygen vacancies increase carrier concentration promote separation bulk. addition,...
Five novel polyoxometalate compounds built on the lacunary Keggin-type polyanion [GeW11O39]8- and trivalent rare earth ions (M = Nd, Sm, Y, Yb), [(CH3)4N]2H1.50[Nd1.50(GeW11O39)(H2O)6]·3H2O (1), [(CH3)4N]2H2.25[Sm1.25(GeW11O39) (H2O)4]·3.75H2O (2), [(CH3)4N]2.50H2.50[Y(GeW11O39)(H2O)2]·4H2O (3), [(CH3)4N]2.50H2.50Yb(GeW11O39)(H2O)2]·3.75H2O (4), [Sm(H2O)7]0.5H0.5[Sm2(GeW11O39)(DMSO)3(H2O)6]·3.5H2O (5) (DMSO dimethyl sulfoxide) have been synthesized characterized by elemental analysis, IR UV...
A series of 3d−4f heterometallic coordination polymers {[CuLn2(pdc)2(SO4)(H2O)6]·H2O}n (Ln = Tb (1), Dy (2); H3pdc 3,5-pyrazoledicarboxylic acid), {[CuLn2(pdc)2(SO4)(H2O)4]·H2O}n Sm (3), Eu (4), Gd (5), (6), (7)) have been hydrothermally synthesized and structurally characterized. The sulfate anions were in situ obtained from oxidation CuSCN during the reaction. Complexes 1−7 are all constructed pyrazole-bridged CuIILnIII dinuclear units anions. 1 2 isostructural possess an infinite...
Transparent and highly luminescent hydrogels synthesized by covalent grafting of lanthanide complexes onto PNIPAM exhibit tunable multi-color luminescence properties.
A novel polycarboxylate superplasticizer (PCE) with a long polyoxyethylene (PEO) chain and terminal carboxylic group was synthesized from modified polyether (SAE-IPEG) to increase its performance in cement. The molecular structure of the PCE characterized by infrared spectroscopy 1H nuclear magnetic resonance (NMR) spectroscopy. cement studied absence presence montmorillonite (Mmt) clay. It found that disperses uniformly without aggregation, which is different significantly conventional...
Relativistic electron (RE) beams at high current density (low safety factor, qa) yet very low free-electron accessed with D2 secondary injection in the DIII-D and JET tokamak are found to exhibit large-scale MHD instabilities that benignly terminate RE beam. In JET, this technique has enabled termination of MA-level currents without measurable first-wall heating. This scenario thus offers an unexpected alternate pathway achieve mitigation collisional dissipation. Benign is explained by two...
Abstract An imaging neutral particle analyser (INPA) diagnostic has been installed and commissioned at the ASDEX Upgrade (AUG) tokamak. The AUG INPA provides energy radially resolved measurements of fast-ion (FI) distribution, complementing existing set which measure confined FI population. To this end, it analyses charge exchange (CX) neutrals produced in reactions between injected by a beam injector. These CX are ionised 20 nm carbon foil deflected towards scintillator machine magnetic...
Abstract Measurements of beam driven Alfvén Eigenmode (AE) activity in matched deuterium (D) and hydrogen (H) DIII-D plasmas show a dramatic difference unstable mode fast ion transport for given injected power. The dependence the AE spectrum reversed magnetic shear on thermal species is investigated current ramp by varying power sequence discharges fixed at density. In general, Reversed Shear Eigenmodes (RSAEs) Toroidal (TAEs) are with sub-Alfvénic D injection while primarily only RSAEs H...
By using the in situ generated octamolybdate as an inorganic building block and tuning spacer length of flexible bis(triazole) ligands, three coordination polymers with different architectures, [CuII(btp)2(H2O)(β-Mo8O26)0.5]·H2O (1) (btp = 1,3-bis(1,2,4-triazol-1-yl)propane), [CuII2(btb)3(H2O)2(ζ-Mo8O26)]·3H2O (2) (btb 1,4-bis(1,2,4-triazol-1-yl)butane), [CuII(bth)2(θ-Mo8O26)0.5]·H2O (3) (bth 1,6-bis(1,2,4-triazol-1-yl)hexane) were synthesized structurally characterized. Compound 1 displays...
A new bursting m=1/n=1 instability (m,n: poloidal and toroidal mode numbers) with rapid frequency chirping down has been observed for the first time in a helical plasma intense perpendicular neutral beam injection. This is destabilized peripheral region by resonant interaction between helically trapped energetic ions resistive interchange mode. large radial electric field induced near edge due to enhanced transport of mode, leads clear change flow, suppression microturbulence, triggering an...
Seven coordination polymers with 3,5-pyrazoledicarboxylic acid (H3pdc) and bridging triazolyl ligands, [Ni3(pdc)2(btb)2(H2O)6]n (1), [Zn2(Hpdc)2(btb)(H2O)2]n (2), {[Ni3(pdc)2(bth)(H2O)8]·2DMF}n (3), [Ni(Hpdc)(bth)]n (4), [Ni3(pdc)2(bth)3(H2O)4]n (5), [Ni(Hpdc)(bth)(H2O)]n (6), {[Zn(Hpdc)(bth)(H2O)]·2H2O}n (7) (btb = 1,4-bis(1,2,4-triazol-1-yl)butane, bth 1,6-bis(1,2,4-triazol-1-yl)hexane), have been hydrothermally or solvothermally synthesized structurally characterized. Complexes 1, 3, 4...
The discharge scenario of high temperature plasma with a helical configuration has significantly progressed. increase central ion due to the reduction wall recycling was clearly observed. peaking heating profile and charge exchange loss energetic ions play an important role for further improvement heat transport in internal barrier (ITB) core. ITB electron have been successfully integrated superposition centrally focused cyclotron plasma, regime comparable (Ti ~ Te) extended. width formed is...
Kinetic instabilities in the MHz range driven by runaway electrons (REs) have been observed for first time during current quench (CQ) disruptions triggered massive injection of argon DIII-D. These are well-correlated with intermittent RE losses beginning formation. The phase is not when power exceeds a threshold. Novel measurements distribution function CQ indicate that appear energy (ERE) 2.5–3 MeV, number modes grows linearly ERE, and their frequencies lie 0.1–3 MHz, below ion cyclotron...
Novel water-soluble lanthanide complexes (Ln(IMI-DPA)3) have been synthesized using the task-specific ionic liquid consisting of a dipicolinic acid motif as sensitizer luminescence. In Ln(IMI-DPA)3, Ln(3+) ions are in 9-fold coordination through six carboxylate oxygen atoms and three nitrogen pyridine units, water molecule is excluded from sphere lanthanides. It found that Ln(IMI-DPA)3 possess bright luminescence, long luminescence lifetime aqueous solution, high thermal stability good...
Novel disruption prevention solutions spanning a range of control regimes are being developed and tested on DIII-D to enable ITER success. First, new real-time algorithm has been for regulating nearness stability limits maintaining safety-margins. Its first application reliable vertical displacement events (VDEs) by adjusting plasma elongation (κ) the inner-gap between inner-wall in response open-loop VDE growth rate (γ) estimators. VDEs were robustly prevented up average rates 800 rad s−1...
By introducing enantiomerically pure mono-bidentate N-donor ligands (LR/LS) into Yb(btfa)3(H2O)2 and Yb(dbm)3(H2O), respectively, two pairs of chiral YbIII enantiomers, namely Yb(btfa)3LR/Yb(btfa)3LS (D-1/L-1) [Yb(dbm)3LR]·[Yb(dbm)3(C2H5OH)]/[Yb(dbm)3LS]·[Yb(dbm)3(C2H5OH)] (D-2/L-2) were isolated, where btfa- = 3-benzoyl-1,1,1-trifluoroacetonate, dbm- dibenzoylmethanate, LR/LS (-)/(+)-4,5-pinenepyridyl-2-pyrazine. D-1/L-1 possess mononuclear structures in which the ions are...