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Plasmon, gold nanoparticles, nano devices

Research Reveals Insights Into Optical Properties of Plasmonic Nanostructures

University of Arkansas physicists are able to accurately describe the geometric structure of gold nanobars, enabling more precise coupling of plasmonic nanostructures with light.

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Dynamo, Turbulence, Magnetic Field, von-Kármán-Sodium , Vortex, magnetic energy, dynamo theory, Jacobo Varela, Sacha Brun, Bérengère Dubrulle, Caroline Nore, Oak Ridge National Laboratory, LIMSI, CEA Saclay, University Paris-Saclay, Physics of Plasmas

Understanding Stars: How Tornado-Shaped Flow in a Dynamo Strengthens the Magnetic Field

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A new simulation based on the von-Kármán-Sodium (VKS) dynamo experiment takes a closer look at how the liquid vortex created by the device generates a magnetic field. Researchers investigated the effects of fluid resistivity and turbulence on the collimation of the magnetic field, where the vortex becomes a focused stream. They report their findings this week in the journal Physics of Fluids.

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plasma propulsion, Plasma, neutralizer, exhaust beam, Radio Frequency, radio-frequency self-bias effect, spectrscopy, James Dedrick, Andrew Gibson, Dmytro Rafalskyi, Ane Aanesland, University of York, CNRS - Ecole Polytechnique, Physics of Plasmas

Neptune: Neutralizer-Free Plasma Propulsion

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The most established plasma propulsion concepts are gridded-ion thrusters that accelerate and emit a larger number of positively charged particles than those that are negatively charged. To enable the spacecraft to remain charge-neutral, a “neutralizer” is used to inject electrons to exactly balance the positive ion charge in the exhaust beam. However, the neutralizer requires additional power from the spacecraft and increases the size and weight of the propulsion system. Researchers are investigating how the radio-frequency self-bias effect can be used to remove the neutralizer altogether, and they report their work in this week’s Physics of Plasmas.

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Renewable Fuel, Concrete Beams, Enzyme's 3D Structure, and More in the Engineering News Source

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Plasma, Physics, Lithium, Princeton, Princeton Plasma Physics Laboratory, Tokamak, Deuterium, LTX, MAPP , lithium oxide, NSTX, NSTX-U

Physicists Discover That Lithium Oxide on Tokamak Walls Can Improve Plasma Performance

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A team of physicists has found that a coating of lithium oxide on the inside of fusion machines known as tokamaks can absorb as much deuterium as pure lithium can.

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Good Natural Dust, Charging with Motion, Plasma Stability, and More in the DOE Science News Source

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Mars Talk, the Dangers of Supernovae, Billionth Gamma Ray, and More in the Space News Source

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A Quark Like No Other, Biophysics Plays Key Role in Immune System Signaling and Response, ALMA Reveals Sun in New Light, and MORE in the Physics News Source Sponsored by AIP

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Biofuels Are Not Carbon Neutral, Predicting Jellyfish, Health Issues From Fracking, and More in the Environment News Source

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