Featured Research

from universities, journals, and other organizations

Highest magnetic fields ever created

Date:
June 28, 2011
Source:
Helmholtz Association of German Research Centres
Summary:
On June 22, 2011, scientists at Helmholtz-Zentrum Dresden-Rossendorf set a new world record for magnetic fields with 91.4 teslas. To reach this record, the researchers developed a coil weighing about 200 kilograms in which electric current create the giant magnetic field -- for a period of a few milliseconds. The coil survived the experiment unscathed.

Magnetic coil.
Credit: Image courtesy of Helmholtz Association of German Research Centres

On June 22, 2011, scientists at Helmholtz-Zentrum Dresden-Rossendorf set a new world record for magnetic fields with 91.4 teslas. To reach this record, Sergei Zherlitsyn and his colleagues at the High Magnetic Field Laboratory Dresden (HLD) developed a coil weighing about 200 kilograms in which electric current create the giant magnetic field -- for a period of a few milliseconds. The coil survived the experiment unscathed. "

Related Articles


With this record, we're not really that interested in reaching top field values, but instead in using it for research in materials science," explains Joachim Wosnitza, the HLD's Director. The scientists are actually proud of being the first user lab worldwide to make such high magnetic fields available for research. The more powerful a magnetic field is, the more precisely the scientists can examine those substances which are used for innovative electronic components or for so-called superconductors which conduct electricity without any resistance. Such high magnetic fields are generated by passing an electric current through a copper coil.

But the magnetic field also influences the electric current because it tries to push the electric current out of the coil. The stronger the current flows, the more powerful these forces are. "At 25 teslas, the copper would be torn apart," Joachim Wosnitza describes a potential scenario of this conflict between the magnetic field and the metal. In comparison: A standard commercial refrigerator magnet has 0.05 teslas.

In order to examine as closely as possible the electric charge in the materials of tomorrow, researchers need higher magnetic fields with, for example, 90 or 100 teslas. "At 100 teslas, though, the Lorentz force inside the copper would generate a pressure which equals 40,000 times the air pressure at sea level," calculates Joachim Wosnitza. These forces would tear copper apart like an explosion. That is why researchers use specific copper alloys which can withstand ten thousand times the atmospheric pressure. They then add a corset made from a special fiber that is typically used for bulletproof vests and which holds the alloy together from the outside. The HZDR technicians wind six of these special wires with corsets into a coil that has a hollow space of 16 millimeters at its center. This permits the generation of 50 teslas within this special coil when a brief but powerful electric pulse flashes through the copper -- a process that is over after a mere 0.02 seconds.

But that's still, though, far away from the world record of 89 teslas which the US Americans held in Los Alamos for several years. And that is why the technicians put a second coil consisting of twelve layers of copper wire around the first one. This wire, though, can only withstand 2,500 times the atmospheric pressure. But protected by a plastic corset, a current pulse lasting only a fifth of a second suffices to create a 40 tesla magnetic field inside the coil. Together with the 50 teslas of the inner coil, this adds up to the world record of more than 90 teslas. Covered by a steel jacket, this double coil has a height of 55 centimeters and a diameter of 32 centimeters; thus, resembling a fairly large water bucket. For several weeks, the HZDR technicians worked on the coil which not only set the world record, but which will also permit many future studies of new materials in the record magnetic field.

For such experiments, researchers are flocking to Dresden not only from Regensburg, Garching, and Karlsruhe, but also from all over Europe. Even Japanese and US American scientists are already making reservations at the HZDR so that they can analyze their materials here. And since today the existing five rooms equipped with similar coils can no longer handle the crowds of researchers, an additional six of these "pulse cells" will be built by 2015. Magnetic-field research at the HZDR actually continues to expand even after the world record.


Story Source:

The above story is based on materials provided by Helmholtz Association of German Research Centres. Note: Materials may be edited for content and length.


Cite This Page:

Helmholtz Association of German Research Centres. "Highest magnetic fields ever created." ScienceDaily. ScienceDaily, 28 June 2011. <www.sciencedaily.com/releases/2011/06/110628112314.htm>.
Helmholtz Association of German Research Centres. (2011, June 28). Highest magnetic fields ever created. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2011/06/110628112314.htm
Helmholtz Association of German Research Centres. "Highest magnetic fields ever created." ScienceDaily. www.sciencedaily.com/releases/2011/06/110628112314.htm (accessed October 31, 2014).

Share This



More Matter & Energy News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Jaguar Land Rover Opens $800 Million Factory in Britain

Jaguar Land Rover Opens $800 Million Factory in Britain

AFP (Oct. 30, 2014) British luxury car manufacturer Jaguar Land Rover opened a $800 million engine manufacturing centre in western England, creating 1,400 jobs. Duration: 00:45 Video provided by AFP
Powered by NewsLook.com
SkyCruiser Concept Claims to Solve Problem With Flying Cars

SkyCruiser Concept Claims to Solve Problem With Flying Cars

Buzz60 (Oct. 30, 2014) A start-up company called Krossblade says its SkyCruiser concept flying car solves the problem with most flying car concepts. Mara Montalbano (@maramontalbano) explains. Video provided by Buzz60
Powered by NewsLook.com
Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Reuters - Innovations Video Online (Oct. 29, 2014) A Swedish amputee who became the first person to ever receive a brain controlled prosthetic arm is able to manipulate and handle delicate objects with an unprecedented level of dexterity. The device is connected directly to his bone, nerves and muscles, giving him the ability to control it with his thoughts. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Robots Get Funky on the Dance Floor

Robots Get Funky on the Dance Floor

AP (Oct. 29, 2014) Dancing, spinning and fighting robots are showing off their agility at "Robocomp" in Krakow. (Oct. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins