Latest Astrophysical plasma Stories

Iron In The Sun
2013-09-06 08:00:37

AlphaGalileo Foundation Scientists from the Heidelberg Max Planck Institute for Nuclear Physics (MPIK) in cooperation with DESY (Hamburg) at the synchrotron PETRA III have investigated for the first time X-ray absorption of highly charged iron ions. A transportable ion trap developed at MPIK was used for generation and storage of the ions. The high-precision measurements provide important new insight into the role of highly charged ions in astrophysical plasmas, e. g. for radiation...

New Results Pave Way For Future Of X-ray Astrophysics Research
2012-12-13 17:36:02

Lee Rannals for redOrbit.com — Your Universe Online Scientists are paving the way for future X-ray astrophysics research by explaining why observations from orbiting X-ray telescopes do not match theoretical predictions. The team used powerful X-rays from the Linac Coherent Light Source (LCLS) at the U.S. Department of Energy's (DOE) SLAC National Accelerator Laboratory to study and measure a key process at work in extreme plasmas like those found in stars, black holes and...

Magnetic Turbulence Could Cause Solar Wind Temperature Rise
2012-08-19 06:44:46

redOrbit Staff & Wire Reports - Your Universe Online Magnetic turbulence is most likely the reason that solar wind moving away from our sun and our solar system is hotter than it theoretically should be, according to new research from scientists at the University of Warwick. As solar wind leaves the sun and expands beyond the solar system, it should begin to cool off due to the lack of particle collisions to dissipate energy, the university explained in a Friday press release. That...

Extreme Plasma Theories Are Being Put To The Test
2012-08-07 13:20:41

The first controlled studies of extremely hot, dense matter have overthrown the widely accepted 50-year old model used to explain how ions influence each other's behavior in a dense plasma. The results should benefit a wide range of fields, from research aimed at tapping nuclear fusion as an energy source to understanding the inner workings of stars. The study also demonstrates the unique capabilities of the Linac Coherent Light Source (LCLS) X-ray laser at the U.S. Department of Energy...

2011-11-15 19:20:54

Temperature and energy equipartition in cosmic plasmas explained Why the temperatures in the solar wind are almost the same in certain directions, and why different energy densities are practically identical, was until now not clear. With a new approach to calculating instability criteria for plasmas, Bochum researchers lead by Prof. Dr. Reinhard Schlickeiser (Chair for Theoretical Physics IV) have solved both problems at once. They were the first to incorporate the effects of collisions...

2009-12-11 13:10:00

Physicists working in space plasmas have made clever use of the Ulysses spacecraft and the solar minimum to create a massive virtual lab bench to provide a unique test for the science underlying turbulent flows. Researchers have an ideal mathematical model of turbulence in fluids (ideal because the model is of an infinitely large flow). They also have been able to measure how such turbulence builds over time  by measuring how that turbulent flow of material fluctuates as it crosses or...

2009-11-02 11:38:52

Experiments capture behavior of stressed magnetic fields Magnetized plasmas occupy a large fraction of our cosmic universe; they exist on our sun, in the earth's magnetosphere, and in astrophysical plasmas. They also exist in laboratory magnetic fusion grade plasmas, and in other smaller experiments as well. Energy stored in stressed magnetic fields can produce large-scale explosive events that spontaneously evolve and energize particles, owing to unsteady and impulsive local processes in...

2009-09-01 10:59:59

Researchers at the University of Warwick have found what could be the signal of ideal wave "surfing" conditions for individual particles within the massive turbulent ocean of the solar wind.  The discovery could give a new insight into just how energy is dissipated in solar system sized plasmas such as the solar wind and could provide significant clues to scientists developing  fusion power which relies on plasmas.The research, led by Khurom Kiyanai and  Professor Sandra...

2008-11-23 14:58:33

A plasma "“ or ionized gas "“ can be as commonplace as in fluorescent light bulbs, or exotic in the extreme, as a thermonuclear explosion. The Earth's upper atmosphere is a plasma, as are lightning bolts and virtually all stars that light up the night sky.For nearly a hundred years, physicists have worked to develop intricate mathematical theories for dealing with the plasma state, but detailed knowledge about plasma constituents and their precise interaction dynamics has been...

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