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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Numerical and experimental analysis of the Young’s modulus of cold compacted powder materials
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Dynamic stress-strain response of high-energy ball milled aluminium powder compacts
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Radon measurements with a compact, organic-scintillator-based alpha/beta spectrometer
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PET-RAFT and SAXS: High Throughput Tools To Study Compactness and Flexibility of Single-Chain Polymer Nanoparticles
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Feasibility study of a compact heavy ion source for investigation of laboratory magnetospheric plasma
We are developing a laser ion source to provide a high brightness multi-charged heavy ion beam as a part of the heavy ion beam probe system, which will be used to diagnose plasma potential in the Ring Trap 1 device at the University of Tokyo. As a probe beam, Nb2+ was selected, and a detailed laser irradiation condition was explored. It was found that the laser power density of 1.2 × 109 W/cm2 gives the maximum particle number of Nb2+ per laser energy from a niobium foil target. Essential ablation plasma parameters to design the laser ion source were also obtained. The expected beam current was more than 12 mA/cm2, with a pulse width of 3.1 µs at 200 mm away from the target.
Compact experimental negative triangularity reactor (CENTAUR): A design study for a compact, affordable breakeven tokamak
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A compact dication source for Ba 2+ tagging and heavy metal ion sensor development
Here, we present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time in the ionization region. Barium, lead, and cadmium samples have been used to test the system, with ion currents identified and quantified using a quadrupole mass analyzer. Realization of a clean Ba 2+ ion beam within a bench-top system represents an important technical advance toward the development and characterization of barium tagging systems for neutrinoless double beta decay searches in xenon gas. This system also provides a testbed for investigation of novel ion sensing methodologies for environmental assay applications, with dication beams of Pb 2+ and Cd 2+ also demonstrated for this purpose.
Charged compact boson stars and shells in the presence of a cosmological constant
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A Compact Beam-Forming Network for Switched-Beam Arrays.
Abstract not provided.
Active Phase Correction of Compact High Resolution Silicon Photonic Arrayed Waveguide Gratings.
Abstract not provided.
Tolerance Bound Calculation for Compact Model Calibration Using Functional Data Analysis.
Abstract not provided.
Compact Heat Exchanger Semi-circular Header Burst Pressure and Strain Validation.
Abstract not provided.
High-Mobility Transparent Conducting Oxides for Compact Epsilon-Near-Zero Silicon Photonic Phase Modulators.
Abstract not provided.