Feeds

Earth's writhing magnetic field could aid fusion research

Null points for ESA's Cluster

Build a business case: developing custom apps

The European satellite constellation Cluster has reported a first - it has seen a region of the Earth's magnetic field spontaneously reconfiguring itself. As well as breaking new scientific ground, the findings could have a practical application for scientists working on new ways of generating energy.

In space, magnetic field are violent turbulent things - a world away from a familiar bar magnet. Different regions of magnetism behave something like large, plasma containing bubbles, ESA explains. When the bubbles are pushed together, the field lines can deform, then break and reconnect, forming a new, more stable arrangement.

The exact point of the reconnection is called the "null point", and until now, scientists have never been able to observe one.

The actual event happened way back in September 2001 somewhere in the Earth's magnetotail on the night-side of the planet. But the data take so long to process, it is only now that scientists can say with any confidence that they have hit the bullseye and found a null point.

The analysis, led by Dr Xiao from Chinese Academy of Sciences, revealed that the null point existed in a vortex structure about 500km across.

This was totally unexpected, as no previous observations or computer simulations have predicted the null point to have this size or configuration.

This process - magnetic reconnection - is thought to be behind some spectacular phenomena, such as the jets of material ejected from the poles of black holes, the solar flares our own sun produces, and even some of the aurorae in our atmosphere.

But this isn't all about pretty pictures: understanding the process could help researchers developing nuclear fusion technology. The magnetic reconnection events are known to make nuclear fusion rather unpredictable. Better understanding the processes could lead to better reactor design.

Earlier this year, Cluster researchers discovered that space is fizzing. Thousands of bubbles of superheated gas are created at the boundary between Earth's magnetic field and the solar wind, a constant stream of gas from the sun.

Initially the scientists though the bubbles, also known as density holes, were glitches in the instrumentation. "Inside" a bubble, the density of the gas drops by ten times, but the temperature soars from 100,000 degrees to 10,000,000 degrees.

Exactly how the bubbles are formed is not known, but the scientists suspect the shock wave where the solar wind hits our magnetic shield is creating the energy to drive them. ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
China building SUPERSONIC SUBMARINE that travels in a BUBBLE
Shanghai to San Fran in two hours would be a trick, though
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

Top 10 endpoint backup mistakes
Avoid the ten endpoint backup mistakes to ensure that your critical corporate data is protected and end user productivity is improved.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up distributed data
Eliminating the redundant use of bandwidth and storage capacity and application consolidation in the modern data center.
The essential guide to IT transformation
ServiceNow discusses three IT transformations that can help CIOs automate IT services to transform IT and the enterprise
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.