Succeeded to generate a powerful magnetic field of the world's highest '1200 Tesla', the state of the experiment was completely SF movie

The University of Tokyo research group succeeded in generating a strong magnetic field of 1,200 Tesla which is 400 times the MRI. This is the world's highest record exceeding the record of the past as an experiment to produce a highly controllable magnetic field carried out indoors. The state of the experiment has been published on YouTube, and the state of the scene like the science fiction movie is talked about.

The world's highest magnetic field of 1200 tesla recorded indoors - the beginning of unknown strong magnetic field science |
http://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=6034

Magnetic Field Record Set With a Bang: 1,200 Tesla - IEEE Spectrum
https://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/magnetic-field-record-set-with-a-bang-1200-tesla

In January 2018, the research team of the University of Tokyo succeeded in generating the world's highest magnetic field of 985 Tesla using the new experimental equipment. It was a big leap because the previous record was 730 Tesla in 2011, but a record of 1200 Tesla was announced anew on "September 17" Review of Scientific Instruments ".

Record indoor magnetic field of 1200 T generated by electromagnetic flux-compression: Review of Scientific Instruments: Vol 89, No 9
https://aip.scitation.org/doi/full/10.1063/1.5044557

The state of the experiment can be seen from the following movie. An explosion has occurred just after the generation of a strong magnetic field, and it looks like a science fiction film.

Magnetic Field Record Set With a Bang: 1200 Tesla - YouTube


This is the experimental apparatus. No change will occur about 3 seconds after the movie starts ... ...

The screen blanks with sudden big explosion sounds. It seems like an accident site when looking at only this, but it seems that explosion often occurs in the experiment.

Sparks scatter ... ...

Explosion once again shortly.

However, it settled down in a few seconds.

The magnetic field of 1200 Tesla is 400 times the MRI. Professor Shojirou Okayama of the University of Tokyo Physical Institute who is the one who carried out the experiment said that he thought that the maximum record of this device would be about 700 Tesla, but it was decided that results far exceeded it.

The method of generating a strong magnetic field is broadly divided into " magnetic flux concentration method " and "one turn coil method". This time we used the "electromagnetic concentration method" in which magnetic flux passed through a metal cylinder is compressed by electromagnetic force in the magnetic flux concentration method. Since the magnetic flux inside the cylinder can not leak to the outside, a strong magnetic field will eventually occur in a small space.

Specifically, the magnitude of the initial magnetic field in the experiment was 3.2 Tesla, which was almost the same as inside the MRI. A metallic cylinder (liner) having a length of 12 cm and a thickness of 1.5 mm is installed in a coil made of iron (main coil), and electric charge is discharged to the main coil via 480 cables. It clearly caught that it exceeded 600 Tesla after 40.3 microseconds and 1200 Tesla per 40.7 microseconds as the liner shrinks.

The experimental equipment was covered with an iron enclosure so that it can withstand shock waves and was designed to withstand a shock wave of 700 Tesla. However, since we did not assume a strong magnetic field of 1,200 Tesla at the beginning of the experiment, the door of the enclosure was destroyed in the experiment, "Professor Takayama says," We will make more powerful next time " .

The research group has completed the 1,000 Tesla class magnetic superconducting ultra-high magnetic field generator under the plan of "Ministry of Education, Culture, Sports, Science and Technology, Ministry of Education, Culture, Sports, Science and Technology. The movement of electrons is restricted under a strong magnetic field, and more accurate measurement is possible than ever, so new discoveries of solid physics are expected.

With this device, we have acquired powerful means to elucidate the unknown solid physical quantum phenomenon with semiconductors, nanomaterials, organic substances, superconductors, magnetic substances In the world of strong magnetic field generation by human knowledge It can be said that we are opening a page of new history, "researchers said.