At Yasushi Ono Laboratory Hongo Group, in addition to the TS-6 spherical torus uniting experimental device with a large radius of 0.2 m and a high magnetic field (~ 0.5T), the TS-4U spherical torus uniting experimental device with a large radius of 0.5 m also has a high magnetic field. The torus plasma combined heating experiment is in full swing, and all the contractors, teachers, and students have refurbished the internal coil, which has become unable to withstand the high magnetic field experiment, with a high magnetic field type coil. The work to open the inside of the TS-4U is done occasionally, but this time, a high magnetic field coil that has a poroidal winding in addition to the toroidal winding called a flux core is set, and a total of two types of internal coils are placed on the central symmetric axis. Installed a high magnetic field torus coil and solenoid coil. With the high magnetic field flux core, not only the high magnetic field tocamac but also the generation of FRC (magnetic field reversal coordination) by the union of the high magnetic field spheromac, and the generation of ultra-high beta spherical tocamac by applying a toroidal magnetic field to the FRC also develops the high magnetic field region. Will be possible. The future focus of the high magnetic field tokamak plasma coalescence that achieved a high ion temperature of over keV is to grasp the interesting ultra-high beta configuration generated after coalescence, and interesting phenomena such as the formation of absolute minimal magnetic field coordination have already been found. I will. We plan to proceed with the verification in collaboration with the ST-40 experiment of the British fusion venture.
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