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

Your Smartphone Broadcasts Your Entire Life To The Secret Service
2014 09 23
Intelligence services collect metadata on the communication of all citizens. Politicians would have us believe that this data doesn’t say all that much. A reader of De Correspondent put this to the test and demonstrated otherwise: metadata reveals a lot more about your life than you think. Ton Siedsma is nervous. He made the decision weeks ago, but keeps postponing it. ...
Scots were tricked into voting ‘No’ – Salmond
2014 09 23
London politicians gulled Scottish voters out of independence by making a false “vow” to grant Glasgow extra powers, First Minister Alex Salmond has said. He also raised the prospect of another referendum, saying the break-up is inevitable. Alex Salmond, leader of the ’Yes’ campaign and the outgoing head of the Scottish National Party (SNP), told the BBC’s Sunday Politics program that ...
The Most Terrifying Thing About Ebola
2014 09 23
The disease threatens humanity by preying on humanity. Suspected Ebola patient Finda “Zanabo” prays over her sick family members before being admitted to the Doctors Without Borders Ebola treatment center on Aug. 21, 2014, near Monrovia, Liberia. Photo by John Moore/Getty Images As the Ebola epidemic in West Africa has spiraled out of control, affecting thousands of Liberians, Sierra Leonians, and Guineans, ...
Man bitten by Ebola patient flown to Switzerland
2014 09 22
Swiss authorities say a male nurse who was bitten by an Ebola patient while working in West Africa has been flown to Switzerland as a precaution. The health ministry says the unidentified man was working for an international organization in Sierra Leone when he was bitten by a child infected with Ebola on Saturday. The ministry says the nurse was wearing protective ...
Climate March in New York City Reveals Communists Demanding ’Revolution, Nothing Less’ - Trash the City With Garbage
2014 09 22
Tens-of-thousands of demonstrators took to the streets of New York City Sunday to demand political leaders take action on climate change. While the protest remained peaceful, much of the “People’s Climate March” appeared to be made up of fringe elements of the political left. Dozens of signs denouncing capitalism were spotted at the demonstration, often held by self-proclaimed socialists. “Capitalism is destroying the ...
More News »