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Scientists Propose an Explanation for Puzzling Electron Heat Loss in Fusion Plasmas

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Scientist Elena Belova of the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) and a team of collaborators have proposed an explanation for why the hot plasma within fusion facilities called tokamaks sometimes fails to reach the required temperature, even as researchers pump beams of fast-moving neutral atoms into the plasma in an effort to make it hotter.

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Lab Experiment Mimics Early-Stage Planetary Formation Process

Physicists have directly observed, for the first time, how highly charged dust-sized particles attract and capture others to build up clusters particle by particle. This process can lead to the formation of “granular molecules” whose configurations resemble those of simple chemical molecules.

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EMBARGOED

A reporter's PressPass is required to access this story until the embargo expires on 4-Aug-2015 11:00 AM EDT

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Lobster-Eye Imager Detects Soft X-ray Emissions

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This week in the journal Review of Scientific Instruments, from AIP Publishing, the group describes developing and launching their imager, which centers on "Lobster-Eye optics," as well as its capabilities and future applications in space exploration.

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A New Litmus Test for Chaos?

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Researchers from the University of Maryland have come up with a new definition of chaos that applies more broadly than Lyapunov exponents and other previous definitions of chaos. The new definition fits on a few lines, can be easily approximated by numerical methods, and works for a wide variety of chaotic systems.

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Newswise Recommends DOE Science News

Research news from the U.S. Department of Energy Office of Science and DOE-funded laboratories across the U.S.

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Yoichiro Nambu, Nobel-Winning Theoretical Physicist, 1921-2015

University of Chicago Professor Emeritus Yoichiro Nambu, who received a share of the 2008 Nobel Prize in Physics for his theory about the workings of the subatomic world, died July 5 in Osaka, after an acute heart attack. He was 94.

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Mass Map Shines Light on Dark Matter

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An international team of researchers has developed a new map of the distribution of dark matter in the universe using data from the Dark Energy Survey.

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Constant Change

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The fundamental constants that govern the laws of nature are being determined with increasing accuracy. A new paper in this week’s Journal of Physical and Chemical Reference Data outlines the proceedings from this year's Workshop on the Determination of the Fundamental Constants, where scientists convened to share their research of fundamental constants. Ultimately, better definitions of these constants will aid the redefinition of several standard scientific units, including the kilogram and the Kelvin, by 2018.

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It All Comes to Light

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New advances, including light sources, allow for non-destructive techniques for examining old artifacts.