▲ The latest simulation experiments show that it should be possible to create a magnetic field of 1 million Tesla
Beijing time October 10 news, according to foreign media reports, the latest research shows that scientists should be able to create a “super magnetic field” on the earth, equivalent to the magnetic field strength of black holes and neutron stars .
According to the latest research report by Masakatsu Murakami and his colleagues at Osaka University, Japan, bombarding microtubes with lasers can generate a very strong magnetic field, which will be of great significance for the development of basic physics, materials science and astronomy research. On October 6, this research paper was published in the open access journal “Scientific Reports” .
Most of the magnetic fields on the earth, even artificial ones, are not particularly strong. Magnetic resonance imaging (MRI) used in hospitals usually produces 1 Tesla (equivalent to 10,000 Gauss). In comparison, the magnetic field generated by the compass needle swinging northward is 0.3-0.5 Gauss, which is the magnetic field produced by some MRI equipment. Up to 10.5 Tesla (105,000 Gauss). In 2018, scientists used lasers in the laboratory to create a magnetic field of up to 1,200 Tesla. After that, scientists never exceeded the “limiting magnetic field.”
The latest simulation experiments show that it should be possible to create a magnetic field of 1 million Tesla. Masakatsu Murakami and the research team found through computer simulation and modeling experiments that it can be activated by firing super-strong laser pulses in a hollow tube with a diameter of only a few microns. The electrons on the tube wall cause the electrons to jump into the cavity in the center of the hollow tube, causing centripetal bursts in the hollow tube. The interaction of these hot electrons and the centripetal explosion of the hollow tube caused the current to flow. This flow of charge formed a magnetic field. The researchers found that in this case, the current can amplify the existing magnetic field by two to three orders of magnitude.
This super magnetic field will not last long and will disappear after about 10 nanoseconds. But for modern physics experiments, this is already ample time, because modern physics often studies those particles that disappear instantly and the corresponding conditions.
Masakatsu Murakami and the research team will further use supercomputer simulations to confirm that these super magnetic fields can be realized by modern technology. Their calculations show that generating super magnetic fields under realistic conditions requires a pulse energy of 0.1-1 J, and a total power of 10-100 Gigabytes. A watt laser system (1 gigawatt equals 1 trillion watts). According to a report in Science in 2018, European extreme light infrastructure has deployed 10 trillion watt lasers, and Chinese scientists plan to build 100 trillion watt lasers, which are called “super laser stations.”
Super-strong magnetic fields have many applications in the field of fundamental physics, including searching for dark matter. American scientific media have reported that super-strong magnets can also confine the plasma in a fusion reactor to a smaller area, laying the foundation for future fusion energy sources.
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