Scientists from the University of Tokyo partially destroyed the laboratory during the experiment, but managed not only to obtain a super-strong magnetic field, but also to prove the effectiveness of a new method of obtaining it. Its author, Shojiro Takeyama, hoped to reach the 700 Tesla level, but instead, all 1200 Tesla raged inside the 40 microseconds installation. For a minute, that's 400 times more powerful than modern MRI machines and 50 million times stronger than the Earth's magnetic field.
Takeyama set out to develop a method for generating super-powerful magnetic fields. This is extremely important for studying the behavior of particles on a nanoscale - they decided to generate a magnetic field by the method of electromagnetic compression of a stream with a huge current strength. During the experiment, 3.2 MJ of energy was expended, although scientists prepared a 5 MJ charge, but did not dare to use this power entirely. As it turned out, they did the right thing.
The experimental setup consisted of a large single coil connected to an array of capacitors, inside which a thin liner was inserted — a tiny copper tube with a wall thickness of 1.5 mm. At startup, power was fed to the coil through 480 individual cables, passing 40 million amperes per microsecond, creating a powerful magnetic field that induced a counter current in the liner and another magnetic field. A thin liner under the influence of powerful fields began to "explode inward" at a speed of 5 km / s, compressing the magnetic field.
As a result of the experiment, both the liner and the main coil were destroyed by the explosion, as calculated. However, Takeyama built a steel bunker around it based on an impact force of 700 tons, but the explosion turned out to be one and a half times stronger, which caused some elements of the installation to be torn off the mountings, and the doors were warped. But all the equipment is easy to repair, and now Japanese scientists are preparing a new experiment, where they are going to use all 5 MJ of energy and hope to reach 1500 Tesla.