Feeds

Plasma boffins' POWERFUL wind now a key clue to fiery Sun

Astrophysical turbulence experienced in lab hotbox

Top 5 reasons to deploy VMware with Tegile

Boffins have attempted to recreate astrophysical turbulence in the laboratory, so they can study the force that forms stars, carries heat across galaxies and troubles the edge of the Earth's magnetosphere.

Using the Large Plasma Device at UCLA, physicists took high resolution images of turbulent plasma in the chamber and were able to test out current theories of what happens when plasma goes wild. They found that the models held good for the scenarios they tested.

Space turbulence is a force that regulates the formation of the stars throughout the galaxy and determines the radiation emitted from the super massive black hole at the center of our galaxy. It also makes the Sun's corona - the fiery haze that surrounds the Sun - up to 1,000 times hotter than the Sun's surface, reaching temperatures of a million degrees Celsius.

A solar prominence, credit NASA

A solar prominence erupts into the Sun's corona. Photo by NASA

Closer to Earth, turbulence caused by violent emissions of charged particles from the Sun creates solar-powered winds that disrupt satellite signals and affect weather on the planet.

The scientists wanted to test out if the modern theory of astrophysical turbulence held good in experiments. According to current theory, turbulent motions in space and astrophysical systems are governed by Alfven waves, which are traveling disturbances of the plasma and magnetic field. The scientists wanted to test what happens in nonlinear interactions between Alfven waves traveling up and down the magnetic field — such as two magnetic waves colliding to create a third wave. The resulting turbulence confirmed what researchers expected about plasma behaviour.

It is almost impossible to measure the effects of astrophysical plasma in space itself - the paper explains that only lab experiments can achieve the controlled conditions and allow scientists to take the high-resolution images necessary.

Toward Astrophysical Turbulence in the Laboratory is published in Physical Review Letters, the journal of the American Physical Society. ®

Beginner's guide to SSL certificates

More from The Register

next story
PORTAL TO ELSEWHERE scried in small galaxy far, far away
Supermassive black hole dominates titchy star formation
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Edge Research Lab to tackle chilly LOHAN's final test flight
Our US allies to probe potential Vulture 2 servo freeze
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
Archaeologists and robots on hunt for more Antikythera pieces
How much of the world's oldest computer can they find?
prev story

Whitepapers

Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.