Engineers and technicians in late December completed testing of a 36-tesla magnet. (Tesla is a measure of magnetic-field strength; the new magnet is more than 1,200 times stronger than a typical refrigerator magnet.)
This achievement reestablishes the magnet lab as the world-record holder for the highest-field “resistive” magnet — a type of electromagnet that uses electricity to generate high magnetic fields. The new magnet — actually an upgrade to an existing one — bests the previous record of 35 tesla, jointly held by the magnet lab and the Grenoble High Magnetic Field Laboratory in France.
“This latest world record is a credit to the ingenuity of the magnet lab’s engineers,” said Nathanael Fortune, chairman of the National High Magnetic Field Laboratory’s User Committee and an associate professor of physics at Smith College in Massachusetts. “The magnet lab’s competitive edge in science and technology depends on continuous enhancements to the lab’s facilities, and users will be thrilled to reach higher fields without increasing the amount of electric power required to get there.”
Engineers at the magnet lab are driven to push magnetic fields as high as possible: They never stop fine-tuning, tinkering and rethinking their magnet designs. This explains why the laboratory holds numerous records — 13 at last count — for strength of field and other key measures of high-magnetic-field research.
Resistive magnets are built in-house at the magnet lab using so-called Florida Bitter technology pioneered by researchers there. Circular plates of copper sheet metal are stamped with cooling holes; insulators with the same pattern are placed between the plates and stacked to make a coil. Voltage is then run across the coil and current flows to make a magnetic field in the center. Because of the limits of available materials (both to conduct current and to minimize stress on the coils), engineers were stuck at 35 tesla for about four years.
But magnet lab engineers discovered that by adjusting the stacking pattern of the Bitter plates, they could increase the magnetic field without increasing stress on the coils. This cost-neutral modification means a higher magnetic field can be created using the same amount of power, 20 megawatts. By comparison, the magnet at the Grenoble High Magnetic Field Laboratory achieves its 35 tesla using 22.5 megawatts of power.
The 36-tesla magnet, which has a 32-millimeter (1.25-inch) experimental space, will be used primarily for physics and materials science research.
Jingping Chen, manager of the resistive magnet program at the magnet lab, said the upgrade of the magnet is just a start, and that major upgrades are planned for many of the resistive magnets at the laboratory.
“We believe this magnet has the potential to reach even higher fields,” Chen said. “We plan to upgrade our other 35-tesla magnet this year as well. And our wider-bore, 31-tesla magnets will be upgraded to around 33 tesla — which will be a new record in the 50-millimeter (1.97-inch) category.”
The National High Magnetic Field Laboratory develops and operates state-of-the-art, high-magnetic-field facilities that faculty and visiting scientists and engineers use for research. The laboratory is sponsored by the National Science Foundation and the state of Florida. To learn more, visit www.magnet.fsu.edu.CONTACT: Mark Bird; (850) 644-7789, firstname.lastname@example.org
Mark Bird | Newswise Science News
When helium behaves like a black hole
22.03.2017 | University of Vermont
Astronomers hazard a ride in a 'drifting carousel' to understand pulsating stars
22.03.2017 | International Centre for Radio Astronomy Research
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
22.03.2017 | Materials Sciences
22.03.2017 | Physics and Astronomy
22.03.2017 | Materials Sciences