Physics

Incoherent combining of fiber lasers developed for directed energy applications

Developed at the U.S. Naval Research Laboratory, Plasma Physics Division, incoherent combining of high power fiber lasers for directed energy (DE) weapons and power beaming have proven effective in laser weapon systems (LaWS) prototypes now being temporarily deployed onboard select Navy ships.

X-rays resurrect 200-year-old lost aria

(Phys.org) —Thanks to scientists at the SLAC National Accelerator Laboratory, audiences can hear a 200-year-old opera by composer Luigi Cherubini in full for the first time in centuries. The scientists blasted X-rays at the damaged musical score to peek at the musical notes hidden beneath a layer of smudgy black.

'Popcorn' particle pathways promise better lithium-ion batteries

Researchers have confirmed the particle-by-particle mechanism by which lithium ions move in and out of electrodes made of lithium iron phosphate, findings that could lead to better performance in lithium-ion batteries in electric vehicles, medical equipment and aircraft.

NASA Schedules Media Events and Coverage for New Solar Mission Launch

NASA's Interface Region Imaging Spectrograph (IRIS) mission is scheduled to launch at 7:27 p.m. PDT (10:27 p.m. EDT) Wednesday, June 26, from Vandenberg Air Force Base in California.

Marks on Martian Dunes May Reveal Tracks of Dry Ice Sleds

NASA research indicates hunks of frozen carbon dioxide -- dry ice -- may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.

Simple theory may explain dark matter

Most of the matter in the universe may be made out of particles that possess an unusual, donut-shaped electromagnetic field called an anapole.

Research team proposes lumpy crust of X-ray pulsars responsible for arrest of spin slowing

(Phys.org) —A trio of researchers working in Spain suggests in a paper published in the journal Nature Physics that the surface of some neutron stars might be "lumpy." Stars with such a surface might help explain, they say, the lack of pulsars with spin periods longer than 12 seconds. After running simulations in their lab, the researchers found that neutron stars with lumpy "pasta-like" surfaces would slow to a certain point then stop slowing with periods remaining constant at near to 12 seconds.

Testing artificial photosynthesis: Fully integrated microfluidic test-bed for solar-driven electrochemical energy conversion systems

Researchers have developed the first fully integrated microfluidic test-bed for evaluating and optimizing solar-driven electrochemical energy conversion systems. This test-bed system has already been used to study schemes for photovoltaic electrolysis of water, and can be readily adapted to study proposed artificial photosynthesis and fuel cell technologies.

Simple theory may explain mysterious dark matter

The reason dark matter, which makes up 85 percent of all the matter in the universe, is invisible could be because it possesses a rare, donut-shaped type of electromagnetism instead of the more exotic forces that have been proposed, according to an analysis by theoretic physicists.

Researchers suggest magicians' mirror tricks could be used as large scale cloaking devices (w/ video)

(Phys.org) —John Howell, a Professor of Physics at the University of Rochester, and his teenage son, have uploaded a paper to the preprint server arXiv in which they suggest that some common magicians' tricks could be used to create large cloaking devices. They describe three types of simple cloaking devices: one made of Plexiglass and water, another of inexpensive lenses, and a third constructed using ordinary mirrors.

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