Extreme Plasma Theories Put to the Test
2012 08 08

From: ScienceDaily.com

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 (DOE)’s SLAC National Accelerator Laboratory. While researchers have created extremely hot and dense plasmas before, LCLS allows them to measure the detailed properties of these states and test a fundamental class of plasma physics for the first time ever.


The peaks on this chart represent key energy signatures produced in a dense ultrahot plasma, which for the first time allow detailed measurements of the effects of this plasma environment.



Plasma is sometimes referred to as the fourth state of matter -- alongside solid, liquid and gas -- and in this case it was hundreds of times hotter than the surface of the sun (2 million kelvins or 3.6 million degrees Fahrenheit). These measurements, reported by an international team of researchers and published this week in Physical Review Letters, contradict the prevailing model that scientists have used for a half-century to understand the conditions inside plasmas.

"We don’t think this could have been done elsewhere," said Justin Wark, leader of a group at Oxford University that participated in the study. "Having an X-ray laser is key."

The international research team, which made the plasma by targeting super-thin aluminum with X-rays at LCLS, reported its initial results in January. Now, in a second study based on a new analysis of data from the same experiment, the group tackled another question: How are atoms in such a hot, dense plasma affected by their environment?

[...]


Read the full article at: sciencedaily.com







Related Articles
Plasma Rain on the Sun
Huge Magnetic Plasma ’Snake’ Spotted On the Sun
Our Evolving Solar System: Plasma, Polar Reversals, and 2012
Plasma Lasers for Shielding - and Advertising
The World Axis, Cosmic Axis, or Axis Mundi. Plasma Mythology (Video)


Latest News from our Front Page

Ancient Aryan Mummies and Pyramids of China
2014 11 21
After years of controversy and political intrigue, archaeologists using genetic testing have proven that Caucasians roamed China’s Tarim Basin thousands of years before East Asian people arrived. The research, which the Chinese government has appeared to have delayed making public out of concerns of fueling Uighur Muslim separatism in its western-most Xinjiang region, is based on a cache of ancient dried-out ...
Detekt: A New Malware Detection Tool That Can Expose Illegitimate State Surveillance
2014 11 21
Recent years have seen a boom in the adoption of surveillance technology by governments around the world, including spyware that provides its purchasers the unchecked ability to target remote Internet users’ computers, to read their personal emails, listen in on private audio calls, record keystrokes and passwords, and remotely activate their computer’s camera or microphone. EFF, together with Amnesty International, ...
New UK spy chief says tech giants aid terrorism, privacy not ‘absolute right’
2014 11 21
Robert Hannigan, the new head of GCHQ The new head of Britain’s GCHQ, the UK equivalent of the NSA in the U.S., said he believes privacy is not an absolute right and that tech giants must open themselves up to intelligence agencies. “GCHQ is happy to be part of a mature debate on privacy in the digital age,” Hannigan said. “But privacy ...
LOL: Atheist Feminist Pornographer Used as Moral Authority in T-shirt Row
2014 11 21
Dr. Matt Taylor was thrust into the headlines this last week, largely for his lead role in successfully landing a spacecraft on a comet 300 million miles from earth that travels at a speed of 85,000 mph. In short, Taylor and his colleagues pulled off one of the most amazing achievements in contemporary science and space exploration, and in a ...
Forty Years that Unmade France
2014 11 21
Eric Zemmour is a well-known French author and television personality. Of Algerian-Jewish origin, he may seem an unlikely spokesman for French tradition, but he has emerged in recent years as a prominent scourge of ideological orthodoxy. He is unquestionably the most prominent mainstream French commentator who speaks candidly about race. Eric Zemmour This role comes with a price. In 2011 he was ...
More News »