12/11/2021 sixteen 0
Different kinds of rare earth magnets serve one of the most key roles in the field of contemporary Physics. The magnetic fields they generate keep the plasma in the chambers of thermonuclear reactors that are experimental by assisting them. particle flows are increased and directed into the accelerator tunnels, for instance. But not all of the existing electro rare earth magnets are equipped with the same features however, and recent research and engineers at Fermi National Laboratory have developed a new superconducting electromagnet, with superior characteristics to the ones that was previously developed in this direction.
In places like the Large Hadron Collider, which is the most efficient particle accelerator currently, rare earth magnets need to generate an average field of 8 Tesla. The magnet output to the operating mode works smooth at 0.006 Tesla per second, and takes approximately 20 minutes. In particle accelerators with rare earth magnets that are wrapped in copper , the magnetic field builds up in a faster speed. For example, the rare earth magnets found in the Japanese accelerator J-PARC that generates the most powerful neutron flux, are capable of boosting the strength of the field at speeds of 70 Tesla per second. Similarly, the rare earth magnets that are part of the Fermi lab accelerator, at a rate of 30 Tesla per second.
One of the challenges which makes it challenging to boost the field of superconducting rare earth magnets in high-speed operation is the appearance of “hot spots” in the windings the size of which increases with increasing current and generated magnetic field. The temperature at these hot spots is rapidly rising due to an increase in current. The magnet’s effectiveness is affected or ceases to work when it switches between a superconducting and the normal state of electrical resistance.
Researchers from the Fermi laboratory have discovered a solution in the form of the substance YBCO it is a complicated compound consisting of barium, yttrium copper and oxygen, a well-known superconductor with high temperatures. magnet windings, that can be used at temperatures as high as 20 Kelvin are made of this material. They are capable of supporting currents as high as 1000 amps.
The first prototype of a high temperature electromagnet demonstrated that it can provide a speed of up to around 290 Tesla per second, with a maximum field strength of 0.5 Tesla. Of course, such a magnetic field strength is not the 8 Tesla required for particle accelerators, however researchers are convinced that they still have the capability to improve the current that flows through magnetic fields and, as a result increasing the strength of the magnetic field generated.
The Fermi Laboratory continues to work with its new technology.
It is intended to test various operating modes, and later upgrade the power source. Perhaps, in the near future you will encounter something similar
rare earth magnets
are to be put in experimental facilities, including neutrino detectors, as well as the next generation collider with a 100-kilometer circle. Future Circular Collider.